10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

(Mark One)
☒	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2022

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from              to             

Commission File Number: 001-35480

Enphase Energy, Inc.

(Exact name of registrant as specified in its charter)

Delaware	20-4645388
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

47281 Bayside Parkway

Fremont, CA 94538

(Address of principal executive offices, including zip code)

(877) 774-7000

(Registrant’s telephone number, including area code)

Not Applicable

(Former name, former address and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, $0.00001 par value per share	ENPH	Nasdaq Global Market

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒ No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒ No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an “emerging growth company.” See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act:

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes  ☐ No  ☒

As of July 21, 2022, there were 135,457,275 shares of the registrant’s common stock outstanding, $0.00001 par value per share.

Enphase Energy, Inc. | 2022 Form 10-Q | 1

ENPHASE ENERGY, INC.

FORM 10-Q FOR THE QUARTERLY PERIOD ENDED JUNE 30, 2022

TABLE OF CONTENTS

		Page
	PART I. FINANCIAL INFORMATION
Item 1.	Financial Statements (Unaudited)	3
	Condensed Consolidated Balance Sheets	3
	Condensed Consolidated Statements of Operations	4
	Condensed Consolidated Statements of Comprehensive Income	5
	Condensed Consolidated Statements of Stockholders’ Equity	6
	Condensed Consolidated Statements of Cash Flows	7
	Notes to Condensed Consolidated Financial Statements	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	37
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	47
Item 4.	Controls and Procedures	48
	PART II. OTHER INFORMATION
Item 1.	Legal Proceedings	49
Item 1A.	Risk Factors	49
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	49
Item 3.	Defaults Upon Senior Securities	50
Item 4.	Mine Safety Disclosures	50
Item 5.	Other Information	50
Item 6.	Exhibits	51
	Signature	52

    

Enphase Energy, Inc. | 2022 Form 10-Q | 2

PART I. FINANCIAL INFORMATION

Item 1.    Financial Statements (Unaudited)

ENPHASE ENERGY, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except par value)
(Unaudited)

	As of
	June 30, 2022		December 31, 2021
ASSETS
Current assets:
Cash and cash equivalents	$	495,473	$	119,316
Marketable securities	752,328		897,335
Accounts receivable, net of allowances of $740 and $1,590 at June 30, 2022 and December 31, 2021, respectively	312,451		333,626
Inventory	130,266		74,400
Prepaid expenses and other assets	45,474		37,784
Total current assets	1,735,992		1,462,461
Property and equipment, net	86,778		82,167
Operating lease, right of use asset, net	16,987		14,420
Intangible assets, net	96,887		97,758
Goodwill	197,004		181,254
Other assets	129,153		118,726
Deferred tax assets, net	174,307		122,470
Total assets	$	2,437,108	$	2,079,256
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	90,398	$	113,767
Accrued liabilities	197,919		157,912
Deferred revenues, current	74,067		62,670
Warranty obligations, current (includes $24,772 and $14,612 measured at fair value at June 30, 2022 and December 31, 2021, respectively)	29,197		19,395
Debt, current	88,429		86,052
Total current liabilities	480,010		439,796
Long-term liabilities:
Deferred revenues, non-current	217,095		187,186
Warranty obligations, non-current (includes $49,151 and $36,395 measured at fair value at June 30, 2022 and December 31, 2021, respectively)	67,354		53,982
Other liabilities	23,864		16,530
Debt, non-current	1,197,786		951,594
Total liabilities	1,986,109		1,649,088
Commitments and contingencies (Note 10)
Stockholders’ equity:
Common stock, $0.00001 par value, 300,000 shares authorized; and 135,426 shares and 133,894 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	1		1
Additional paid-in capital	713,473		837,924
Accumulated deficit	(251,230)		(405,737)
Accumulated other comprehensive loss	(11,245)		(2,020)
Total stockholders’ equity	450,999		430,168
Total liabilities and stockholders’ equity	$	2,437,108	$	2,079,256

See Notes to Condensed Consolidated Financial Statements.

Enphase Energy, Inc. | 2022 Form 10-Q | 3

ENPHASE ENERGY, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share data)
(Unaudited)

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
Net revenues	$	530,196	$	316,057	$	971,488	$	617,811
Cost of revenues	311,191		188,256		575,510		367,061
Gross profit	219,005		127,801		395,978		250,750
Operating expenses:
Research and development	39,256		22,708		74,975		44,526
Sales and marketing	53,588		25,586		94,932		45,208
General and administrative	32,125		20,107		70,211		40,230
Total operating expenses	124,969		68,401		240,118		129,964
Income from operations	94,036		59,400		155,860		120,786
Other income (expense), net
Interest income	796		98		1,256		171
Interest expense	(2,168)		(12,506)		(4,904)		(19,835)
Other expense, net	(456)		(633)		(2,597)		(60)
Loss on partial settlement of convertible notes	—		(13)		—		(56,382)
Total other expense, net	(1,828)		(13,054)		(6,245)		(76,106)
Income before income taxes	92,208		46,346		149,615		44,680
Income tax (provision) benefit	(15,232)		(6,995)		(20,818)		26,369
Net income	$	76,976	$	39,351	$	128,797	$	71,049
Net income per share:
Basic	$	0.57	$	0.29	$	0.96	$	0.53
Diluted	$	0.54	$	0.28	$	0.91	$	0.49
Shares used in per share calculation:
Basic	135,196		135,094		134,768		133,209
Diluted	143,725		141,533		143,602		144,022

See Notes to Condensed Consolidated Financial Statements.

Enphase Energy, Inc. | 2022 Form 10-Q | 4

ENPHASE ENERGY, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In thousands)
(Unaudited)

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
Net income	$	76,976	$	39,351	$	128,797	$	71,049
Other comprehensive income (loss):
Foreign currency translation adjustments	(2,570)		1,284		(2,306)		1,490
Marketable securities
Change in net unrealized loss	(1,351)		—		(6,919)		—
Less: reclassification adjustment for net losses included in net income	—		—		—		—
Net change, net of income tax benefit of $475 and $2,431 for the three and six months ended June 30, 2022, respectively	(1,351)		—		(6,919)		—
Comprehensive income	$	73,055	$	40,635	$	119,572	$	72,539

    

See Notes to Condensed Consolidated Financial Statements.

Enphase Energy, Inc. | 2022 Form 10-Q | 5

ENPHASE ENERGY, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(In thousands)
(Unaudited)

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
Common stock and paid-in capital
Balance, beginning of period	$	666,512	$	751,689	$	837,925	$	534,745
Cumulative-effect adjustment to Additional paid-in capital related to the adoption of ASU 2020-06	—		—		(207,967)		—
Issuance of common stock from exercise of equity awards	4,183		3,428		4,587		3,642
Payment of withholding taxes related to net share settlement of equity awards	(5,463)		(7,813)		(14,807)		(16,998)
Equity component of convertible notes issued, net of tax	—		8		—		207,970
Cost of convertible notes hedge related to the convertible notes issued, net of tax	—		—		—		(213,322)
Sale of warrants related to the convertible notes issued	—		—		—		220,800
Equity component of partial settlement of convertible notes	—		(74)		—		(966,557)
Cost of reacquired equity component on partial settlement of convertible notes	—		62		—		962,176
Stock-based compensation expense	48,242		15,312		93,736		30,156
Balance, end of period	$	713,474	$	762,612	$	713,474	$	762,612
Accumulated deficit
Balance, beginning of period	$	(328,206)	$	(19,488)	$	(405,737)	$	(51,186)
Cumulative-effect adjustment to accumulated deficit related to the adoption of ASU 2020-06	—		—		25,710		—
Net income	76,976		39,351		128,797		71,049
Repurchase of common stock	—		(200,000)		—		(200,000)
Balance, end of period	$	(251,230)	$	(180,137)	$	(251,230)	$	(180,137)
Accumulated other comprehensive income (loss)
Balance, beginning of period	$	(7,324)	$	640	$	(2,020)	$	434
Foreign currency translation adjustments	(2,570)		1,284		(2,306)		1,490
Change in net unrealized loss on marketable securities, net of tax	(1,351)		—		(6,919)		—
Balance, end of period	$	(11,245)	$	1,924	$	(11,245)	$	1,924
Total stockholders' equity, ending balance	$	450,999	$	584,399	$	450,999	$	584,399

See Notes to Condensed Consolidated Financial Statements.

Enphase Energy, Inc. | 2022 Form 10-Q | 6

ENPHASE ENERGY, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)
(Unaudited)

	Six Months Ended June 30,
	2022		2021
Cash flows from operating activities:
Net income	$	128,797	$	71,049
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	30,805		13,154
Provision for doubtful accounts	131		271
Asset impairment	1,200		—
Non-cash interest expense	4,025		19,463
Loss on partial settlement of convertibles notes	—		56,382
Deemed repayment of convertible notes attributable to accreted debt discount	—		(15,585)
Change in fair value of debt securities	129		(2,369)
Stock-based compensation	100,861		30,156
Deferred income taxes	15,617		(30,127)
Changes in operating assets and liabilities:
Accounts receivable	27,546		(98,531)
Inventory	(55,866)		4,008
Prepaid expenses and other assets	(21,352)		(15,194)
Accounts payable, accrued and other liabilities	10,228		46,890
Warranty obligations	22,878		14,025
Deferred revenues	38,094		47,909
Net cash provided by operating activities	303,093		141,501
Cash flows from investing activities:
Purchases of property and equipment	(21,066)		(26,368)
Investments in private companies	—		(45,000)
Business acquisitions, net of cash acquired	(27,680)		(55,239)
Purchases of marketable securities	(60,061)		—
Maturities of marketable securities	193,033		—
Net cash provided by (used in) investing activities	84,226		(126,607)
Cash flows from financing activities:
Issuance of convertible notes, net of issuance costs	—		1,188,439
Purchase of convertible note hedges	—		(286,235)
Sale of warrants	—		220,800
Principal payments and financing fees on debt	—		(1,422)
Partial repurchase of convertible notes	—		(289,312)
Proceeds from exercise of equity awards and employee stock purchase plan	4,587		3,642
Repurchase of common stock	—		(200,000)
Payment of withholding taxes related to net share settlement of equity awards	(14,807)		(16,998)
Net cash provided by (used in) financing activities	(10,220)		618,914
Effect of exchange rate changes on cash and cash equivalents	(942)		(926)
Net increase in cash and cash equivalents	376,157		632,882
Cash and cash equivalents—Beginning of period	119,316		679,379
Cash and cash equivalents—End of period	$	495,473	$	1,312,261
Supplemental cash flow disclosure:
Supplemental disclosures of non-cash investing and financing activities:
Purchases of property and equipment included in accounts payable	$	2,783	$	4,175
Purchases of property and equipment through tenant improvement allowance	$	748	$	—
Contingent consideration in connection with the acquisition	$	—	$	3,596

See Notes to Condensed Consolidated Financial Statements.

Enphase Energy, Inc. | 2022 Form 10-Q | 7

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1.    DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

Description of Business

Enphase Energy, Inc. (the “Company”) is a global energy technology company. The Company delivers smart, easy-to-use solutions that manage solar generation, storage and communication on one platform. The Company revolutionized the solar industry with its microinverter technology and produces a fully integrated solar-plus-storage solution.

Basis of Presentation and Consolidation

The accompanying condensed consolidated financial statements are presented in accordance with accounting principles generally accepted in the United States (“GAAP”). The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.

Unaudited Interim Financial Information

These accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) for interim financial reporting. In the opinion of management, these unaudited condensed consolidated financial statements reflect all adjustments, consisting of normal recurring items, considered necessary to present fairly the Company’s financial condition, results of operations, comprehensive income, stockholders’ equity and cash flows for the interim periods indicated. The results of operations for the three and six months ended June 30, 2022 are not necessarily indicative of the operating results for the full year.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Significant estimates and assumptions reflected in the financial statements include revenue recognition, allowance for doubtful accounts, stock-based compensation, deferred compensation arrangements, inventory valuation, accrued warranty obligations, fair value of investments, debt derivatives, convertible notes and contingent consideration, fair value of acquired intangible assets and goodwill, useful lives of acquired intangible assets and property and equipment, incremental borrowing rate for right-of-use assets and lease liability. These estimates are based on information available as of the date of the financial statements; therefore, actual results could differ materially from those estimates due to risks and uncertainties, including uncertainty in the ongoing semiconductor supply and logistics constraints, and the continuing COVID-19 pandemic.

The year-end condensed consolidated balance sheet data was derived from audited financial statements but does not include all disclosures required by accounting principles generally accepted in the United States. The Company filed audited consolidated financial statements, which included all information and notes necessary for such a complete presentation in conjunction with its Annual Report on Form 10-K for the fiscal year ended December 31, 2021 filed with the SEC on February 11, 2022 (the “Form 10‑K”).

Summary of Significant Accounting Policies

There have been no changes to the Company’s significant accounting policies as described in Note 2, “Summary of Significant Accounting Policies” of the notes to consolidated financial statements included in Part II, Item 8 of the Form 10-K, other than as a result of the Company’s adoption of the new accounting guidance related to convertible senior notes, effective January 1, 2022, as discussed in “Recently Adopted Accounting Pronouncements” below.

Enphase Energy, Inc. | 2022 Form 10-Q | 8

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Recently Adopted Accounting Pronouncements

In August 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-06, “Debt - Debt with Conversion and Other Options (subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (subtopic 815-40)” (“ASU 2020-06”), which reduces the number of accounting models in subtopic ASC 470-20 that require separate accounting for embedded conversion features. As a result, a convertible debt instrument will be accounted for as a single liability measured at its amortized cost as long as no other features require bifurcation and recognition as derivatives. By removing those separation models, the effective interest rate of convertible debt instruments will be closer to the coupon interest rate. Further, the diluted net income per share calculation for convertible instruments will require the Company to use the if-converted method. The treasury stock method should no longer be used to calculate diluted net income per share for convertible instruments.

The Company adopted ASU 2020-06 in the annual period beginning January 1, 2022, on a modified retrospective basis. Upon adoption of ASU 2020-06, the Company is no longer required to bifurcate the conversion feature related to the issuance of $575.0 million aggregate principal amount of its 0.0% convertible senior notes due 2028 (the “Notes due 2028”) and $632.5 million aggregate principal amount of its 0.0% convertible senior notes due 2026 (the “Notes due 2026”) in equity. Instead, the Company combined the previously separated equity component with the liability component, which together is now classified as debt, thereby eliminating the subsequent amortization of the debt discount. Similarly, the portion of issuance costs previously allocated to equity was reclassified to the carrying value of debt and amortized over the remaining terms of the convertible senior notes. Accordingly, the Company recorded a net decrease to additional paid-in capital by $207.9 million, net of tax to remove the equity component separately recorded for the conversion features associated with the convertible senior notes and equity component associated with the issuance costs, an increase to the carrying value of its convertible debt instrument by $244.5 million to reflect the full principal amount of the convertible senior notes outstanding net of issuance costs, a decrease to deferred tax liability of $62.3 million, and a decrease to accumulated deficit by $25.7 million, net of tax in the Company’s consolidated balance sheet with no impact on the Company’s consolidated statements of operations.

Also upon adoption of ASU 2020-06, the Company is no longer utilizing the treasury stock method for earnings per share impact for 0.25% convertible senior notes due 2025 (the “Notes due 2025”), the Notes due 2026 and the Notes due 2028 (together, the “Convertible Senior Notes”). Instead, the Company is applying the if-converted method when reporting the number of potentially dilutive shares of common stock as the Company may at its election, settle its Convertible Senior Notes through payment or delivery, as the case may be, in cash, shares of its common stock or a combination of cash and shares of its common stock. Further, the Company under the relevant sections of the indentures, irrevocably may elect to settle principal in cash and any excess in cash or shares of the Company’s common stock for its Convertible Senior Notes. If and when the Company makes such election, there will be no adjustment to the net income and the Company will use the average share price for the period to determine the potential number of shares to be issued based upon assumed conversion to be included in the diluted share count.

Recently Issued Accounting Pronouncements

Not Yet Effective

In October 2021, the FASB issued ASU 2021-08, "Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers" (“ASU 2021-08”). ASU 2021-08 requires an acquirer in a business combination to recognize and measure contract assets and contract liabilities acquired in a business combination in accordance with ASC 606, “Revenue from Contracts with Customers,” as if it had originated the contracts. ASU 2021-08 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022. Early adoption is permitted. The Company does not expect the adoption of ASU 2021-08 to have a significant impact on its condensed consolidated financial statements and plans to adopt the standard effective January 1, 2023.

Enphase Energy, Inc. | 2022 Form 10-Q | 9

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

2.    REVENUE RECOGNITION

Disaggregated Revenue

The Company has one major business activity, which is the design, manufacture and sale of solutions for the solar photovoltaic (“PV”) industry. Disaggregated revenue by primary geographical market and timing of revenue recognition for the Company’s single product line are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Primary geographical markets:
U.S.	$	422,628	$	254,576	$	792,120	$	502,358
International	107,568		61,481		179,368		115,453
Total	$	530,196	$	316,057	$	971,488	$	617,811
Timing of revenue recognition:
Products delivered at a point in time	$	511,865	$	302,100	$	936,014	$	590,971
Products and services delivered over time	18,331		13,957		35,474		26,840
Total	$	530,196	$	316,057	$	971,488	$	617,811

Contract Balances

Receivables, and contract assets and contract liabilities from contracts with customers, are as follows:

	June 30, 2022		December 31, 2021
	(In thousands)
Receivables	$	312,451	$	333,626
Short-term contract assets (Prepaid expenses and other assets)	26,537		23,508
Long-term contract assets (Other assets)	78,139		69,583
Short-term contract liabilities (Deferred revenues, current)	74,067		62,670
Long-term contract liabilities (Deferred revenues, non-current)	217,095		187,186

The Company receives payments from customers based upon contractual billing schedules. Accounts receivable are recorded when the right to consideration becomes unconditional. Contract assets include deferred product costs and commissions associated with the deferred revenue and will be amortized along with the associated revenue. The Company had no asset impairment charges related to contract assets in the six months ended June 30, 2022.

Significant changes in the balances of contract assets (prepaid expenses and other assets) as of June 30, 2022 are as follows (in thousands):

Contract Assets
Contract Assets, beginning of period	$	93,091
Amount recognized	(13,156)
Increase	24,741
Contract Assets, end of period	$	104,676

Contract liabilities are recorded as deferred revenue on the accompanying condensed consolidated balance sheets and include payments received in advance of performance obligations under the contract and are realized when the associated revenue is recognized under the contract.

Enphase Energy, Inc. | 2022 Form 10-Q | 10

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Significant changes in the balances of contract liabilities (deferred revenues) as of June 30, 2022 are as follows (in thousands):

Contract Liabilities
Contract Liabilities, beginning of period	$	249,856
Revenue recognized	(35,474)
Increase due to billings	76,780
Contract Liabilities, end of period	$	291,162

Remaining Performance Obligations

Estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially unsatisfied at the end of the reporting period are as follows:

	June 30, 2022
	(In thousands)
Fiscal year:
2022 (remaining six months)	$	38,983
2023	68,667
2024	62,924
2025	55,770
2026	40,141
Thereafter	24,677
Total	$	291,162

3.    OTHER FINANCIAL INFORMATION

    Inventory

Inventory consists of the following:

	June 30, 2022		December 31, 2021
	(In thousands)
Raw materials	$	25,559	$	25,429
Finished goods	104,707		48,971
Total inventory	$	130,266	$	74,400

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ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

    Accrued Liabilities

Accrued liabilities consist of the following:

	June 30, 2022		December 31, 2021
	(In thousands)
Salaries, commissions, incentive compensation and benefits	$	14,670	$	13,062
Customer rebates and sales incentives	116,647		79,038
Freight	17,788		20,522
Operating lease liabilities, current	3,804		3,830
Liability due to supply agreements	12,278		14,653
Contingent consideration	—		3,710
Post combination expense accrual	7,585		8,602
VAT payable	10,952		7,231
Other	14,195		7,264
Total accrued liabilities	$	197,919	$	157,912

4.    BUSINESS COMBINATIONS

Acquisition of SolarLeadFactory, LLC. (“SolarLeadFactory”)

On March 14, 2022, the Company completed the acquisition of 100% of the shares of SolarLeadFactory, a privately-held company. SolarLeadFactory provides high quality leads to solar installers. As part of the purchase price, the Company paid approximately $26.1 million in cash on March 14, 2022.

The acquisition has been accounted for as a business combination under the acquisition method, and accordingly, the total purchase price is allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their respective fair values on the acquisition date.

In addition to the purchase price summarized above, the Company will be obligated to issue up to approximately $10.0 million in shares of common stock of the Company payable in the second quarter of 2023, subject to achievement of certain operational targets. As the additional payments require continuous employment of certain key employees of SolarLeadFactory and are subject to other conditions, these payments are being accounted for as post-combination expense and will be recognized ratably over the one-year period presuming conditions will be met.

The following table summarizes the preliminary estimated fair values of the assets acquired and liabilities assumed at the acquisition date, which are subject to change within the measurement period as the fair value assessments are finalized (in thousands):

Cash and cash equivalents	$	1,426
Net tangible assets acquired	813
Intangible assets	11,200
Goodwill	12,612
Net assets acquired	$	26,051

The excess of the consideration paid over the fair values assigned to the assets acquired and liabilities assumed represents the goodwill resulting from the acquisition. Goodwill is primarily attributable to expected synergies in the Company’s solar offerings and cross-selling opportunities. The entire goodwill amount is expected to be deductible for U.S. federal income tax purposes over 15 years.

Enphase Energy, Inc. | 2022 Form 10-Q | 12

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Intangible assets consist primarily of developed technology and customer relationships. Developed technology intangible attributable to developed technology includes a combination of unpatented technology, trade secrets, computer software and research processes that represent the foundation for the existing and planned new products to facilitate the generation of new content. Customer relationships intangible relates to SolarLeadFactory’s ability to sell current and future offerings, as well as products built around the current offering, to its existing customers.

The following table shows the fair value of the separately identifiable intangible assets at the time of acquisition and the period over which each intangible asset will be amortized:

	Preliminary Fair Value		Useful Life
	(In thousands)		(Years)
Developed technology	$	3,600	5
Customer relationships	7,600		5
Total identifiable intangible assets	$	11,200

Pro forma financial information has not been presented for the SolarLeadFactory acquisition as the impact to the Company’s condensed consolidated financial statements was not material.

The Company incurred and accrued costs related to acquisition of $0.4 million that were recorded in general and administrative expenses in the accompanying condensed consolidated statements of operations for the six months ended June 30, 2022.

5.    GOODWILL AND INTANGIBLE ASSETS

The Company’s goodwill as of June 30, 2022 and December 31, 2021 are as follows:

Goodwill	June 30, 2022		December 31, 2021
	(In thousands)
Goodwill, beginning of period	$	181,254	$	24,783
Goodwill acquired	16,378		156,390
Currency translation adjustment	(628)		81
Goodwill, end of period	$	197,004	$	181,254

The Company’s purchased intangible assets as of June 30, 2022 and December 31, 2021 are as follows:

	June 30, 2022								December 31, 2021
	Gross		Additions		Accumulated Amortization		Net		Gross		Additions		Accumulated Amortization		Net
	(In thousands)
Intangible assets:
Other indefinite-lived intangibles	$	286	$	—	$	—	$	286	$	286	$	—	$	—	$	286
Intangible assets with finite lives:
Developed technology	38,650		3,600		(12,834)		29,416		13,100		25,550		(8,958)		29,692
Customer relationships	41,021		7,600		(15,273)		33,348		26,421		14,600		(11,448)		29,573
Trade names	37,700		—		(3,863)		33,837		—		37,700		(93)		37,607
Order backlog	600		—		(600)		—		—		600		—		600
Total purchased intangible assets	$	118,257	$	11,200	$	(32,570)	$	96,887	$	39,807	$	78,450	$	(20,499)	$	97,758

Enphase Energy, Inc. | 2022 Form 10-Q | 13

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Amortization expense related to finite-lived intangible assets are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Developed technology	$	2,010	$	891	$	3,876	$	1,690
Customer relationships	2,067		1,532		3,825		2,462
Trade names	1,885		85		3,770		147
Order backlog	323		—		600		—
Total amortization expense	$	6,285	$	2,508	$	12,071	$	4,299

Amortization of developed technology is recorded to cost of sales and customer relationships and trade names is recorded to sales and marketing expense.

The expected future amortization expense of intangible assets as of June 30, 2022 is presented below (in thousands):

	June 30, 2022
Fiscal year:
2022 (remaining six months)	$	11,926
2023	24,096
2024	21,299
2025	19,984
2026	16,425
Thereafter	2,871
Total	$	96,601

Enphase Energy, Inc. | 2022 Form 10-Q | 14

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

6.    CASH EQUIVALENTS AND MARKETABLE SECURITIES

The cash equivalents and marketable securities consist of the following:

	As of June 30, 2022
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Cash Equivalents		Marketable Securities
	(In thousands)
Money market funds	$	432,946	$	—	$	—	$	432,946	$	432,946	$	—
Certificates of Deposit	3,126		—		(24)		3,102		—		3,102
Commercial paper	121,294		—		(224)		121,070		—		121,070
Corporate notes and bonds	144,438		1		(3,189)		141,250		—		141,250
U.S. Treasuries	39,551		1		(8)		39,544		—		39,544
U.S. Government agency securities	456,128		—		(8,766)		447,362		—		447,362
Total	$	1,197,483	$	2	$	(12,211)	$	1,185,274	$	432,946	$	752,328

	As of December 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Cash Equivalents		Marketable Securities
	(In thousands)
Money market funds	$	35,789	$	—	$	—	$	35,789	$	35,789	$	—
Certificates of Deposit	16,001		—		(2)		15,999		6,000		9,999
Commercial paper	215,964		—		(114)		215,850		26,997		188,853
Corporate notes and bonds	199,244		—		(872)		198,372		760		197,612
U.S. Treasuries	14,999		—		(1)		14,998		—		14,998
U.S. Government agency securities	487,743		—		(1,870)		485,873		—		485,873
Total	$	969,740	$	—	$	(2,859)	$	966,881	$	69,546	$	897,335

The following table summarizes the contractual maturities of the Company’s cash equivalents and marketable securities as of June 30, 2022:

	Amortized Cost		Fair Value
	(In thousands)
Due within one year	$	1,023,275	$	1,017,129
Due within one to three years	174,208		168,145
Total	$	1,197,483	$	1,185,274

All available-for-sale securities have been classified as current, based on management's intent and ability to use the funds in current operations.

Enphase Energy, Inc. | 2022 Form 10-Q | 15

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

7.    WARRANTY OBLIGATIONS

The Company’s warranty activities were as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Warranty obligations, beginning of period	$	83,579	$	54,553	$	73,377	$	45,913
Accruals for warranties issued during period	11,311		3,319		20,221		7,213
Changes in estimates	17,063		4,269		21,975		11,924
Settlements	(6,590)		(2,757)		(12,471)		(5,687)
Increase due to accretion expense	1,828		1,104		3,343		2,047
Other	(10,641)		(550)		(9,895)		(1,472)
Warranty obligations, end of period	96,551		59,938		96,551		59,938
Less: current portion	(29,197)		(15,009)		(29,197)		(15,009)
Non-current	$	67,354	$	44,929	$	67,354	$	44,929

Changes in Estimates

In the three months ended June 30, 2022, the Company recorded $17.1 million in warranty expense from change in estimates, of which $13.3 million relates to continuing analysis of field performance data and diagnostic root-cause failure analysis primarily for Enphase IQ™ Battery storage systems and $3.8 million is due to an increase in labor reimbursement rates. In the three months ended June 30, 2021, the Company recorded $4.3 million in warranty expense from change in estimates, of which $2.9 million relates to the timing of cost reduction assumptions for replacement products and $1.4 million relates to continuing analysis of field performance data and diagnostic root-cause failure analysis primarily for its prior generation products.

In the six months ended June 30, 2022, the Company recorded $22.0 million in warranty expense from change in estimates, of which $13.3 million relates to continuing analysis of field performance data and diagnostic root-cause failure analysis primarily for Enphase IQ™ Battery storage systems, $4.9 million is related to an increase in expedited freight costs and replacement costs and $3.8 million is due to an increase in labor reimbursement rates. In the six months ended June 30, 2021, the Company recorded $11.9 million in warranty expense from change in estimates, of which $7.7 million relates to continuing analysis of field performance data and diagnostic root-cause failure analysis primarily for its prior generation products, $2.9 million relates to the timing of cost reduction assumptions for replacement products and $1.3 million relates to the other cost assumption changes.

8.    FAIR VALUE MEASUREMENTS

The accounting guidance defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities recorded at fair value, the Company considers the principal or most advantageous market in which it would transact and considers assumptions that market participants would use when pricing the asset or liability, such as inherent risk, transfer restrictions, and risk of nonperformance.

The fair value hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. An asset’s or liability’s categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Three levels of inputs may be used to measure fair value:

•Level 1 - Valuations based on quoted prices in active markets for identical assets or liabilities that the Company is able to access. Since valuations are based on quoted prices that are readily and regularly available in an active market, valuation of such assets or liabilities do not entail a significant degree of judgment.

•Level 2 - Valuations based on one or more quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly.

Enphase Energy, Inc. | 2022 Form 10-Q | 16

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

•Level 3 - Valuations based on inputs that are unobservable and significant to the overall fair value measurement.

The following table presents assets and liabilities measured at fair value on a recurring basis using the above input categories:

	June 30, 2022						December 31, 2021
	(In thousands)
	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents:
Money market funds	$	432,946	$	—	$	—	$	35,789	$	—	$	—
Certificates of deposit	—		—		—		—		6,000		—
Commercial paper	—		—		—		—		26,997		—
Corporate notes and bonds	—		—		—		—		760		—
Marketable securities:
Certificates of deposit	—		3,102		—		—		9,999		—
Commercial paper	—		121,070		—		—		188,853		—
Corporate notes and bonds	—		141,250		—		—		197,612		—
U.S. Government agencies	—		447,362		—		—		485,873		—
U.S. Treasuries	—		39,544		—		—		14,998		—
Other assets
Investments in debt securities	—		—		40,913		—		—		41,042
Total assets measured at fair value	$	432,946	$	752,328	$	40,913	$	35,789	$	931,092	$	41,042
Liabilities:
Accrued liabilities
Contingent consideration	$	—	$	—	$	—	$	—	$	—	$	3,710
Warranty obligations
Current	—		—		24,772		—		—		14,612
Non-current	—		—		49,151		—		—		36,395
Total warranty obligations measured at fair value	—		—		73,923		—		—		51,007
Total liabilities measured at fair value	$	—	$	—	$	73,923	$	—	$	—	$	54,717

Notes due 2028, Notes due 2026 and Notes due 2025

The Company carries the Notes due 2028 and Notes due 2026 at face value less issuance costs on its condensed consolidated balance sheets, and Notes due 2025 at face value less unamortized discount and issuance costs on its condensed consolidated balance sheets. As of June 30, 2022, the fair value of the Notes due 2028, Notes due 2026 and Notes due 2025 was $568.2 million, $611.9 million and $256.5 million, respectively. The fair value as of June 30, 2022 was determined based on the closing trading price per $100 principal amount as of the last day of trading for the period. The Company considers the fair value of the Notes due 2028, Notes due 2026 and Notes due 2025 to be a Level 2 measurement as they are not actively traded.

Investments in debt securities

In January 2021, the Company invested approximately $25.0 million in a privately-held company. The Company concluded the investment qualifies as an investment in a debt security, as it accrues interest and principal plus accrued interest becomes payable back to the Company at certain dates unless it is converted to equity at a pre-determined price. As the investment includes a conversion option, the Company has elected to account for this investment under the fair value option and any change in fair value of the investment is recognized in “Other income (expense), net” in the Company’s condensed consolidated statement of operations for that period. Further, the Company has concluded that the Company’s investment in a debt security is considered to be a Level 3 measurement due to the use of significant unobservable inputs in the valuation model. The fair value was

Enphase Energy, Inc. | 2022 Form 10-Q | 17

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

determined using discounted cash flow methodology and assumptions include implied yield and change in estimated term of investment being held-to-maturity.

In September 2021, the Company invested approximately $13.0 million in secured convertible promissory notes issued by the stockholders of a privately-held company. The investment qualifies as an investment in a debt security and will accrete interest and principal plus accrued interest that becomes payable at certain dates unless it is converted to equity at a pre-determined price. As the investment includes a conversion option, the Company has elected to account for this investment under the fair value option and any change in fair value of the investment is recognized in “Other income (expense), net” in the Company’s condensed consolidated statement of operations for that period. Further, the Company has concluded that the Company’s investment in a debt security is considered a Level 3 measurement due to the use of significant unobservable inputs in the valuation model. Principal plus accrued interest receivable of the investment approximates the fair value.

Investment in debt securities are recorded in “Other assets” on the accompanying condensed consolidated balance sheet as of June 30, 2022. The changes in the balance in investments in debt securities during the period are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Balance at beginning of period	$	39,926	$	26,437	$	41,042	$	—
Investment	—		20,000		—		45,000
Fair value adjustments included in other (expense) income, net	987		932		(129)		2,369
Balance at end of period	$	40,913	$	47,369	$	40,913	$	47,369

Contingent consideration

The estimated fair value of the contingent consideration incurred in connection with the Company’s acquisition of Sofdesk Inc. is considered a Level 3 measurement due to the use of significant unobservable inputs. These unobservable inputs include probability assessment of expected future customer count over the period in which the obligation is expected to be settled. The value was determined using a discounted risk-neutral expected (probability-weighted) cash flow methodology. The resulting expected contingent consideration payment is discounted back to present value using the Company’s cost of debt. The fair value of contingent consideration arrangement is reassessed quarterly based on assumptions used in the Company’s latest projections and input provided by management. Any change in the fair value estimate, which could include accretion of interest expense due to passage of time as well as any changes in the inputs to the model, is recorded in the Company’s condensed consolidated statement of operations for that period.

Enphase Energy, Inc. | 2022 Form 10-Q | 18

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

The following table reflects the activity for the Company’s contingent consideration liabilities measured at fair value using Level 3 inputs for the six months ended June 30, 2022:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Balance at beginning of period	$	—	$	3,540	$	3,710	$	—
Addition	—		—		—		3,500
Fair value adjustments included in other income (expense), net	—		56		15		96
Paid	—		—		(3,725)		—
Balance at end of period	$	—	$	3,596	$	—	$	3,596

Warranty obligations.

Fair Value Option for Warranty Obligations Related to Products Sold Since January 1, 2014

The Company estimates the fair value of warranty obligations by calculating the warranty obligations in the same manner as for sales prior to January 1, 2014 and applying an expected present value technique to that result. The expected present value technique, an income approach, converts future amounts into a single current discounted amount. In addition to the key estimates of failure rates, claim rates and replacement costs, the Company used certain Level 3 inputs which are unobservable and significant to the overall fair value measurement. Such additional assumptions included a discount rate based on the Company’s credit-adjusted risk-free rate and compensation comprised of a profit element and risk premium required of a market participant to assume the obligation.

The following table provides information regarding changes in nonfinancial liabilities related to the Company’s warranty obligations measured at fair value on a recurring basis using significant unobservable inputs designated as Level 3 for the periods indicated:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Balance at beginning of period	$	61,586	$	33,319	$	51,007	$	28,736
Accruals for warranties issued during period	11,120		3,319		19,890		7,213
Changes in estimates	14,692		2,755		18,591		5,338
Settlements	(4,668)		(1,910)		(8,724)		(3,825)
Increase due to accretion expense	1,828		1,104		3,343		2,047
Other	(10,636)		(550)		(10,185)		(1,472)
Balance at end of period	$	73,923	$	38,037	$	73,923	$	38,037

Quantitative and Qualitative Information about Level 3 Fair Value Measurements

As of June 30, 2022 and December 31, 2021, the significant unobservable inputs used in the fair value measurement of the Company’s liabilities designated as Level 3 are as follows, of which the monetary impact for change in discount rate is captured in “Other” in the table above:

			Percent Used (Weighted Average)
Item Measured at Fair Value	Valuation Technique	Description of Significant Unobservable Input	June 30, 2022	December 31, 2021
Warranty obligations for products sold since January 1, 2014	Discounted cash flows	Profit element and risk premium	16%	15%
		Credit-adjusted risk-free rate	16%	12%

Enphase Energy, Inc. | 2022 Form 10-Q | 19

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Sensitivity of Level 3 Inputs - Warranty Obligations

Each of the significant unobservable inputs is independent of the other. The profit element and risk premium are estimated based on requirements of a third-party participant willing to assume the Company’s warranty obligations. The credit‑adjusted risk‑free rate (“discount rate”) is determined by reference to the Company’s own credit standing at the fair value measurement date. Increasing the profit element and risk premium input by 100 basis points would result in a $0.6 million increase to the liability. Decreasing the profit element and risk premium by 100 basis points would result in a $0.6 million reduction of the liability. Increasing the discount rate by 100 basis points would result in a $2.5 million reduction of the liability. Decreasing the discount rate by 100 basis points would result in a $2.8 million increase to the liability.

9.    DEBT

The following table provides information regarding the Company’s debt:

	June 30, 2022		December 31, 2021
	(In thousands)
Convertible notes
Notes due 2028	$	575,000	$	575,000
Less: unamortized debt discount	—		(143,636)
Less: unamortized debt issuance costs	(7,359)		(5,775)
Carrying amount of Notes due 2028 (1)	567,641		425,589
Notes due 2026	632,500		632,500
Less: unamortized debt discount	—		(104,755)
Less: unamortized debt issuance costs	(7,312)		(6,678)
Carrying amount of Notes due 2026 (1)	625,188		521,067
Notes due 2025	102,175		102,175
Less: unamortized debt discount	(12,447)		(14,584)
Less: unamortized debt issuance costs	(1,299)		(1,539)
Carrying amount of Notes due 2025	88,429		86,052
Notes due 2023	5,000		5,000
Less: unamortized issuance costs	(43)		(62)
Carrying amount of Notes due 2023	4,957		4,938
Total carrying amount of debt	1,286,215		1,037,646
Less: current portion of convertible notes	(88,429)		(86,052)
Debt, non-current	$	1,197,786	$	951,594

(1)    The net carrying amount was increased on January 1, 2022 as a result of the adoption of ASU 2020-06. Refer to Note 2, Summary of Significant Accounting Policies, in this Quarterly Report on Form 10-Q for further information.

Enphase Energy, Inc. | 2022 Form 10-Q | 20

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Convertible Senior Notes due 2028

On March 1, 2021, the Company issued $575.0 million aggregate principal amount of the Notes due 2028. The Notes due 2028 will not bear regular interest, and the principal amount of the Notes due 2028 will not accrete. The Notes due 2028 are general unsecured obligations and are governed by an indenture between the Company and U.S. Bank National Association, as trustee. The Notes due 2028 will mature on March 1, 2028, unless earlier repurchased by the Company or converted at the option of the holders. The Company received approximately $566.4 million in net proceeds, after deducting the initial purchasers’ discount, from the issuance of the Notes due 2028.

The initial conversion rate for the Notes due 2028 is 3.5104 shares of common stock per $1,000 principal amount of the Notes due 2028 (which represents an initial conversion price of approximately $284.87 per share). The conversion rate for the Notes due 2028 will be subject to adjustment upon the occurrence of certain specified events but will not be adjusted for any accrued and unpaid special interest, if any. In addition, if a make-whole fundamental change or a redemption with respect to the Notes due 2028 occurs prior to the maturity date, under certain circumstances as specified in the relevant indenture, the Company will increase the conversion rate for the Notes due 2028 by a number of additional shares of the Company’s common stock for a holder that elects to convert its notes in connection with such make-whole fundamental change or redemption. Upon conversion, the Company will settle conversions of the Notes due 2028 through payment or delivery, as the case may be, of cash, shares of its common stock or a combination of cash and shares of its common stock, at the Company’s election.

The Company may not redeem the Notes due 2028 prior to September 6, 2024. The Company may redeem for cash all or any portion of the Notes due 2028, at the Company’s election, on or after September 6, 2024, if the last reported sale price of the Company’s common stock has been greater than or equal to 130% of the conversion price then in effect for the Notes due 2028 (i.e. $370.33, which is 130% of the current conversion price for the Notes due 2028) for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period ending on, and including, the trading day immediately preceding the date on which the Company provides notice of redemption. The redemption price will equal 100% of the principal amount of the Notes due 2028 to be redeemed, plus accrued and unpaid special interest, if any to, but excluding, the relevant redemption date. No sinking fund is provided for the Notes due 2028.

The Notes due 2028 may be converted on any day prior to the close of business on the business day immediately preceding September 1, 2027, in multiples of $1,000 principal amount, at the option of the holder only under any of the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on June 30, 2021 (and only during such calendar quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price for the Notes due 2028 (i.e., $370.33 which is 130% of the current conversion price for the Notes due 2028) on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the “Measurement Period”) in which the “trading price” (as defined in the relevant indenture) per $1,000 principal amount of notes for each trading day of the Measurement Period was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate for the Notes due 2028 on each such trading day; (3) if the Company calls any or all of the Notes due 2028 for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events. On and after September 1, 2027 until the close of business on the second scheduled trading day immediately preceding the maturity date of March 1, 2028, holders of the Notes due 2028 may convert their notes at any time, regardless of the foregoing circumstances. Upon the occurrence of a fundamental change (as defined in the relevant indenture), holders may require the Company to repurchase all or a portion of their Notes due 2028 for cash at a price equal to 100% of the principal amount of the notes to be repurchased plus any accrued and unpaid special interest, if any, to, but excluding, the fundamental change repurchase date.

In accounting for the issuance of the Notes due 2028 on March 1, 2021, the Company separated the Notes due 2028 into liability and equity components. The carrying amount of the liability component of approximately $415.0 million was calculated by using a discount rate of 4.77%, which was the Company’s borrowing rate on the date of the issuance of the Notes due 2028 for a similar debt instrument without the conversion feature. The carrying amount of the equity component of approximately $160.0 million, representing the

Enphase Energy, Inc. | 2022 Form 10-Q | 21

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

conversion option, was determined by deducting the fair value of the liability component from the par value of the Notes due 2028. The equity component of the Notes due 2028 was included in additional paid-in capital in the condensed consolidated balance sheet through December 31, 2021 and was not remeasured. The difference between the principal amount of the Notes due 2028 and the liability component (the “debt discount”) was amortized to interest expense using the effective interest method over the term of the Notes due 2028 through December 31, 2021.

Through December 31, 2021, the Company separated the Notes due 2028 into liability and equity components which resulted in a tax basis difference associated with the liability component that represents a temporary difference. The Company recognized the deferred taxes of $40.1 million for the tax effect of that temporary difference as an adjustment to the equity component included in additional paid-in capital in the condensed consolidated balance sheet.

Debt issuance costs for the issuance of the Notes due 2028 were approximately $9.1 million, consisting of initial purchasers' discount and other issuance costs. In accounting for the transaction costs, the Company allocated the total amount incurred to the liability and equity components using the same proportions as the proceeds from the Notes due 2028. Transaction costs attributable to the liability component were approximately $6.6 million, which were recorded as debt issuance cost (presented as contra debt in the condensed consolidated balance sheet) and are being amortized to interest expense over the term of the Notes due 2028. The transaction costs attributable to the equity component were approximately $2.5 million and were netted with the equity component in stockholders’ equity.

Following the adoption of ASU 2020-06 as of January 1, 2022, the Company no longer records the conversion feature of Notes due 2028 in equity. Instead, the Company combined the previously separated equity component with the liability component, which together is now classified as debt, thereby eliminating the subsequent amortization of the debt discount as interest expense. Similarly, the portion of issuance costs previously allocated to equity was reclassified to the carrying amount of Notes due 2028 and is amortized over the remaining term of the notes. Accordingly, the Company recorded a net decrease to additional paid-in capital by approximately $117.3 million, net of tax to remove the equity component separately recorded for the conversion features associated with the Notes due 2028 and equity component associated with the issuance costs, an increase of approximately $141.3 million in the carrying value of Notes due 2028 to reflect the full principal amount of the Notes due 2028, net of issuance costs, a decrease to deferred tax liability of approximately $36.0 million, and a decrease to accumulated deficit of approximately $12.0 million, net of tax in the Company’s consolidated balance sheet with no impact on the Company’s consolidated statements of operations. As of June 30, 2022, the unamortized deferred issuance cost for the Notes due 2028 was $7.4 million on the condensed consolidated balance sheet.

The following table presents the total amount of interest cost recognized in the statement of operations relating to the Notes due 2028:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Amortization of debt discount	$	—	$	4,872	$	—	$	6,483
Amortization of debt issuance costs	327		236		643		315
Total interest cost recognized	$	327	$	5,108	$	643	$	6,798

Notes due 2028 Hedge and Warrant Transactions

In connection with the offering of the Notes due 2028, the Company entered into privately-negotiated convertible note hedge transactions (“Notes due 2028 Hedge”) pursuant to which the Company has the option to purchase a total of approximately 2.0 million shares of its common stock (subject to anti-dilution adjustments), which is the same number of shares initially issuable upon conversion of the Notes due 2028, at a price of $284.87 per share, which is the initial conversion price of the Notes due 2028. The total cost of the convertible note hedge transactions was approximately $161.6 million. The convertible note hedge transactions are expected generally to reduce potential dilution to the Company’s common stock upon any conversion of the Notes due 2028 and/or offset

Enphase Energy, Inc. | 2022 Form 10-Q | 22

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

any cash payments the Company is required to make in excess of the principal amount of converted notes, as the case may be.

Additionally, the Company separately entered into privately-negotiated warrant transactions (the “2028 Warrants”) whereby the Company sold warrants to acquire approximately 2.0 million shares of the Company’s common stock (subject to anti-dilution adjustments) at an initial strike price of $397.91 per share. The Company received aggregate proceeds of approximately $123.4 million from the sale of the 2028 Warrants. If the market value per share of the Company’s common stock, as measured under the 2028 Warrants, exceeds the strike price of the 2028 Warrants, the 2028 Warrants will have a dilutive effect on the Company’s earnings per share, unless the Company elects, subject to certain conditions, to settle the 2028 Warrants in cash. Taken together, the purchase of the Notes due 2028 Hedge and the sale of the 2028 Warrants are intended to reduce potential dilution from the conversion of the Notes due 2028 and to effectively increase the overall conversion price from $284.87 to $397.91 per share. The 2028 Warrants are only exercisable on the applicable expiration dates in accordance with the Notes due 2028 Hedge. Subject to the other terms of the 2028 Warrants, the first expiration date applicable to the Notes due 2028 Hedge is June 1, 2028, and the final expiration date applicable to the Notes due 2028 Hedge is July 27, 2028.

Given that the transactions meet certain accounting criteria, the Notes due 2028 Hedge and the 2028 Warrants transactions are recorded in stockholders’ equity, and they are not accounted for as derivatives and are not remeasured each reporting period.

Convertible Senior Notes due 2026

On March 1, 2021, the Company issued $575.0 million aggregate principal amount of the Notes due 2026. In addition, on March 12, 2021, the Company issued an additional $57.5 million aggregate principal amount of the Notes due 2026 pursuant to the initial purchasers’ full exercise of the over-allotment option for additional Notes due 2026. The Notes due 2026 will not bear regular interest, and the principal amount of the Notes due 2026 will not accrete. The Notes due 2026 are general unsecured obligations and are governed by an indenture between the Company and U.S. Bank National Association, as trustee. The Notes due 2026 will mature on March 1, 2026, unless earlier repurchased by the Company or converted at the option of the holders. The Company received approximately $623.0 million in net proceeds, after deducting the initial purchasers’ discount, from the issuance of the Notes due 2026.

The initial conversion rate for the Notes due 2026 is 3.2523 shares of common stock per $1,000 principal amount of the Notes due 2026 (which represents an initial conversion price of approximately $307.47 per share). The conversion rate for the Notes due 2026 will be subject to adjustment upon the occurrence of certain specified events but will not be adjusted for accrued and unpaid interest. In addition, if a make-whole fundamental change or a redemption with respect to the Notes due 2026 occurs prior to the maturity date, under certain circumstances as specified in the relevant indenture, the Company will increase the conversion rate for the Notes due 2026 by a number of additional shares of the Company’s common stock for a holder that elects to convert its notes in connection with such make-whole fundamental change or redemption. Upon conversion, the Company will settle conversions of Notes due 2026 through payment or delivery, as the case may be, of cash, shares of its common stock or a combination of cash and shares of its common stock, at the Company’s election.

The Company may not redeem the Notes due 2026 prior to the September 6, 2023. The Company may redeem for cash all or any portion of the Notes due 2026, at the Company’s election, on or after September 6, 2023, if the last reported sale price of the Company’s common stock has been greater than or equal to 130% of the conversion price then in effect for the Notes due 2026 (i.e., $399.71, which is 130% of the current conversion price for the Notes due 2026) for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading day period ending on, and including, the trading day immediately preceding the date on which the Company provides notice of redemption. The redemption price will equal 100% of the principal amount of the Notes due 2026 to be redeemed, plus accrued and unpaid special interest, if any, to, but excluding, the relevant redemption date for the Notes due 2026. The redemption price will be increased as described in the relevant indentures by a number of additional shares of the Company in connection with such optional redemption by the Company. No sinking fund is provided for the Notes due 2026.

The Notes due 2026 may be converted on any day prior to the close of business on the business day immediately preceding September 1, 2025, in multiples of $1,000 principal amount, at the option of the holder only

Enphase Energy, Inc. | 2022 Form 10-Q | 23

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

under any of the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on June 30, 2021 (and only during such calendar quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price of the Notes due 2026 (i.e., $399.71, which is 130% of the current conversion price for the Notes due 2026) on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the “measurement period”) in which the “trading price” (as defined in the relevant indenture) per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate for Notes due 2026 on each such trading day; (3) if the Company calls any or all of the Notes due 2026 for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events. On and after September 1, 2025 until the close of business on the second scheduled trading day immediately preceding the maturity date of March 1, 2026, holders of the Notes due 2026 may convert their notes at any time, regardless of the foregoing circumstances. Upon the occurrence of a fundamental change (as defined in the relevant indenture), holders may require the Company to repurchase all or a portion of their Notes due 2026 for cash at a price equal to 100% of the principal amount of the notes to be repurchased plus any accrued and unpaid special interest, if any, to, but excluding, the fundamental change repurchase date.

In accounting for the issuance of the Notes due 2026 on March 1, 2021, the Company separated the Notes due 2026 into liability and equity components. The carrying amount of the liability component of approximately $509.0 million was calculated by using a discount rate of 4.44%, which was the Company’s borrowing rate on the date of the issuance of the Notes due 2026 for a similar debt instrument without the conversion feature. The carrying amount of the equity component of approximately $123.5 million, representing the conversion option, was determined by deducting the fair value of the liability component from the par value of the Notes due 2026. The equity component of the Notes due 2026 was included in additional paid-in capital in the condensed consolidated balance sheet through December 31, 2021 and was not remeasured. The difference between the principal amount of the Notes due 2026 and the liability component (the “debt discount”) was amortized to interest expense using the effective interest method over the term of the Notes due 2026 through December 31, 2021.

Through December 31, 2021, the Company separated the Notes due 2026 into liability and equity components which resulted in a tax basis difference associated with the liability component that represents a temporary difference. The Company recognized the deferred taxes of $31.0 million for the tax effect of that temporary difference as an adjustment to the equity component included in additional paid-in capital in the condensed consolidated balance sheet.

Debt issuance costs for the issuance of the Notes due 2026 were approximately $10.0 million, consisting of initial purchasers' discount and other issuance costs. In accounting for the transaction costs, the Company allocated the total amount incurred to the liability and equity components using the same proportions as the proceeds from the Notes due 2026. Transaction costs attributable to the liability component were approximately $8.0 million, which were recorded as debt issuance cost (presented as contra debt in the condensed consolidated balance sheet) and are being amortized to interest expense over the term of the Notes due 2026. The transaction costs attributable to the equity component were approximately $2.0 million and were netted with the equity component in stockholders’ equity.

Following the adoption of ASU 2020-06 as of January 1, 2022, the Company no longer records the conversion feature of Notes due 2026 in equity. Instead, the Company combined the previously separated equity component with the liability component, which together is now classified as debt, thereby eliminating the subsequent amortization of the debt discount. Similarly, the portion of issuance costs previously allocated to equity was reclassified to the carrying amount debt and is amortized over the remaining term of the notes. Accordingly, the Company recorded a net decrease to additional paid-in capital by approximately $90.6 million, net of tax to remove the equity component separately recorded for the conversion features associated with the Notes due 2026 and equity component associated with the issuance costs, an increase of approximately $103.2 million in the carrying value of its Notes due 2026 to reflect the full principal amount of the Notes due 2026 outstanding net of issuance costs, a decrease to deferred tax liability of approximately $26.3 million, and a decrease to accumulated deficit of

Enphase Energy, Inc. | 2022 Form 10-Q | 24

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

approximately $13.7 million, net of tax in the Company’s consolidated balance sheet with no impact on the Company’s consolidated statements of operations. As of June 30, 2022, the unamortized deferred issuance cost for the Notes due 2026 was $7.3 million on the condensed consolidated balance sheet.

The following table presents the total amount of interest cost recognized in the statement of operations relating to the Notes due 2026:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Amortization of debt discount	$	—	$	5,587	$	—	$	7,373
Amortization of debt issuance costs	502		404		987		539
Total interest cost recognized	$	502	$	5,991	$	987	$	7,912

Notes due 2026 Hedge and Warrant Transactions

In connection with the offering of the Notes due 2026 (including in connection with the issuance of additional Notes due 2026 upon the initial purchasers’ exercise of their over-allotment option), the Company entered into privately-negotiated convertible note hedge transactions (the “Notes due 2026 Hedge”) pursuant to which the Company has the option to purchase a total of approximately 2.1 million shares of its common stock (subject to anti-dilution adjustments), which is the same number of shares initially issuable upon conversion of the Notes due 2026, at a price of $307.47 per share, which is the initial conversion price of the Notes due 2026. The total cost of the Notes due 2026 Hedge was approximately $124.6 million. The Notes due 2026 Hedge are expected generally to reduce potential dilution to the Company’s common stock upon any conversion of the Notes due 2026 and/or offset any cash payments the Company is required to make in excess of the principal amount of converted notes, as the case may be.

Additionally, the Company separately entered into privately-negotiated warrant transactions, including in connection with the issuance of additional Notes due 2026 upon the initial purchasers’ exercise of their over-allotment option (the “2026 Warrants”), whereby the Company sold warrants to acquire approximately 2.1 million shares of the Company’s common stock (subject to anti-dilution adjustments) at an initial strike price of $397.91 per share. The Company received aggregate proceeds of approximately $97.4 million from the sale of the 2026 Warrants. If the market value per share of the Company’s common stock, as measured under the 2026 Warrants, exceeds the strike price of the 2026 Warrants, the 2026 Warrants will have a dilutive effect on the Company’s earnings per share, unless the Company elects, subject to certain conditions, to settle the 2026 Warrants in cash. Taken together, the purchase of the Notes due 2026 Hedge and the sale of the 2026 Warrants are intended to reduce potential dilution from the conversion of the Notes due 2026 and to effectively increase the overall conversion price from $307.47 to $397.91 per share. The 2026 Warrants are only exercisable on the applicable expiration dates in accordance with the 2026 Warrants. Subject to the other terms of the 2026 Warrants, the first expiration date applicable to the Warrants is June 1, 2026, and the final expiration date applicable to the 2026 Warrants is July 27, 2026.

Given that the transactions meet certain accounting criteria, the Notes due 2026 hedge and the 2026 Warrants transactions are recorded in stockholders’ equity, and they are not accounted for as derivatives and are not remeasured each reporting period.

Enphase Energy, Inc. | 2022 Form 10-Q | 25

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Convertible Senior Notes due 2025

On March 9, 2020, the Company issued $320.0 million Notes due 2025. The Notes due 2025 are general unsecured obligations and bear interest at an annual rate of 0.25% per year, payable semi-annually on March 1 and September 1 of each year, beginning September 1, 2020. The Notes due 2025 are governed by an indenture between the Company and U.S. Bank National Association, as trustee. The Notes due 2025 will mature on March 1, 2025, unless earlier repurchased by the Company or converted at the option of the holders. The Company may not redeem the notes prior to the maturity date, and no sinking fund is provided for the notes. The Notes due 2025 may be converted, under certain circumstances as described below, based on an initial conversion rate of 12.2637 shares of common stock per $1,000 principal amount (which represents an initial conversion price of $81.54 per share). The conversion rate for the Notes due 2025 will be subject to adjustment upon the occurrence of certain specified events but will not be adjusted for accrued and unpaid interest. In addition, upon the occurrence of a make-whole fundamental change (as defined in the relevant indenture), the Company will, in certain circumstances, increase the conversion rate by a number of additional shares for a holder that elects to convert its notes in connection with such make-whole fundamental change. The Company received approximately $313.0 million in net proceeds, after deducting the initial purchasers’ discount, from the issuance of the Notes due 2025.

The Notes due 2025 may be converted prior to the close of business on the business day immediately preceding September 1, 2024, in multiples of $1,000 principal amount, at the option of the holder only under the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on June 30, 2020 (and only during such calendar quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the “measurement period”) in which the “trading price” (as defined in the relevant indenture) per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate on each such trading day; or (3) upon the occurrence of specified corporate events. On and after September 1, 2024 until the close of business on the second scheduled trading day immediately preceding the maturity date of March 1, 2025, holders may convert their notes at any time, regardless of the foregoing circumstances. Upon the occurrence of a fundamental change (as defined in the relevant indenture), holders may require the Company to repurchase all or a portion of their Notes due 2025 for cash at a price equal to 100% of the principal amount of the notes to be repurchased plus any accrued and unpaid interest to, but excluding, the fundamental change repurchase date.

As of June 30, 2022 and December 31, 2021, the sale price of the Company’s common stock was greater than or equal to $106.00 (130% of the notes conversion price) for at least 20 trading days (whether consecutive or not) during a period of 30 consecutive trading days preceding the quarter-ended June 30, 2022 and December 31, 2021. As a result, as of July 1, 2022, the Notes due 2025 are convertible at the holders’ option through September 30, 2022. Accordingly, the Company classified the net carrying amount of the Notes due 2025 of $88.4 million and $86.1 million as Debt, current on the condensed consolidated balance sheet as of June 30, 2022 and December 31, 2021, respectively. From July 1, 2022 through the date this Quarterly Report on Form 10-Q is available to be issued, the Company has not received any requests for conversion of the Notes due 2025.

For the period from March 9, 2020, the issuance date, through May 19, 2020, the number of authorized and unissued shares of the Company’s common stock that are not reserved for other purposes was less than the maximum number of underlying shares that would be required to settle the Notes due 2025 into equity. Accordingly, unless and until the Company had a number of authorized shares that were not issued or reserved for any other purpose that equaled or exceeded the maximum number of underlying shares (the “Share Reservation Condition”), the Company would have been required to pay to the converting holder in respect of each $1,000 principal amount of notes being converted solely in cash in an amount equal to the sum of the daily conversion values for each of the 20 consecutive trading days during the related observation period. However, following satisfaction of the Share Reservation Condition, the Company could settle conversions of notes through payment or delivery, as the case may be, of cash, shares of the Company’s common stock or a combination of cash and shares of its common stock, at the Company’s election. As further discussed below, the Company satisfied the Share Reservation Condition during May 2020.

Enphase Energy, Inc. | 2022 Form 10-Q | 26

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

In accounting for the issuance of the Notes due 2025, on March 9, 2020, the conversion option of the Notes due 2025 was deemed an embedded derivative requiring bifurcation from the Notes due 2025 (the “host contract”) and separate accounting as an embedded derivative liability, as a result of the Company not having the necessary number of authorized but unissued shares of its common stock available to settle the conversion option of the Notes due 2025 in shares. The proceeds from the Notes due 2025 were first allocated to the embedded derivative liability and the remaining proceeds were then allocated to the host contract. On March 9, 2020, the carrying amount of the embedded derivative liability of $68.7 million representing the conversion option was determined using the Binomial Lattice model and the remaining $251.3 million was allocated to the host contract. The difference between the principal amount of the Notes due 2025 and the fair value of the host contract (the “debt discount”) is amortized to interest expense using the effective interest method over the term of the Notes due 2025.

On May 20, 2020, at the Company’s annual meeting of stockholders, the stockholders approved an amendment to the Amended and Restated Certificate of Incorporation to increase the number of authorized shares of the Company’s common stock, par value $0.00001 per share, from 150,000,000 shares to 200,000,000 shares (the “Amendment”). The Amendment became effective upon filing with the Secretary of State of Delaware on May 20, 2020. As a result, the Company satisfied the Share Reservation Condition. The Company may now settle the Notes due 2025 and warrants issued in conjunction with the Notes due 2025 (the “2025 Warrants”) through payment or delivery, as the case may be, of cash, shares of its common stock or a combination of cash and shares of its common stock, at the Company’s election. Accordingly, on May 20, 2020, the embedded derivative liability was remeasured at a fair value of $116.3 million and was then reclassified to additional paid-in-capital in the condensed consolidated balance sheet in the second quarter of 2020 and is no longer remeasured as long as it continues to meet the conditions for equity classification. The Company recorded the change in the fair value of the embedded derivative in other expense, net in the condensed consolidated statement of operations during the year ended December 31, 2020.

The Company separated the Notes due 2025 into liability and equity components which resulted in a tax basis difference associated with the liability component that represents a temporary difference. The Company recognized the deferred taxes of $0.2 million for the tax effect of that temporary difference as an adjustment to the equity component included in additional paid-in capital in the condensed consolidated balance sheet.

Debt issuance costs for the issuance of the Notes due 2025 were approximately $7.6 million, consisting of initial purchasers' discount and other issuance costs. In accounting for the transaction costs, the Company allocated the total amount incurred to the Notes due 2025 host contract. Transaction costs were recorded as debt issuance cost (presented as contra debt in the condensed consolidated balance sheet) and are being amortized to interest expense over the term of the Notes due 2025.

Partial repurchase of Notes due 2025

Concurrently with the offering of the Notes due 2026 and Notes due 2028, the Company entered into separately- and privately-negotiated transactions to repurchase approximately $217.7 million aggregate principal amount of the Notes due 2025. The Company paid $217.7 million in cash and issued approximately 1.67 million shares of its common stock to the holders of the repurchased notes with an aggregate fair value of $302.7 million, representing the conversion value in excess of the principal amount of the Notes due 2025, which were fully offset by shares received from the Company’s settlement of the associated note hedging arrangements discussed below. The total amount of $217.7 million paid to partially settle the repurchases of the Notes due 2025 was allocated between the liability and equity components of the amount extinguished by determining the fair value of the liability component immediately prior to the note repurchases and allocating that portion of the conversion price to the liability component in the amount of $184.5 million. The residual of the conversion price of $4.3 million of the repurchased Notes due 2025, net of inducement loss of $37.5 million for additional shares issued, was allocated to the equity component of the repurchased Notes due 2025 as an increase of additional paid-in capital. The fair value of the note settlement for such repurchases was calculated using a discount rate of 4.35%, representing an estimate of the Company's borrowing rate at the date of repurchase with a remaining expected life of approximately 4.1 years. As part of the settlement of the repurchase of the Notes due 2025, the Company wrote-off the $38.5 million unamortized debt discount and $4.1 million debt issuance cost apportioned to the principal amount of Notes due 2025 repurchased. The Company recorded a loss on partial settlement of the repurchased Notes due 2025 of $9.4 million in Other income (expense), net in the six months ended June 30, 2021, representing the difference between the consideration attributed to the liability component and the sum of the net carrying amount of the liability

Enphase Energy, Inc. | 2022 Form 10-Q | 27

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

component and unamortized debt issuance costs. Further, the Company also recorded loss on inducement of $37.5 million in Other income (expense), net in the six months ended June 30, 2021, representing the difference between the fair value of the shares that would have been issued under the original conversion terms with respect to the repurchased Notes due 2025.

During the second quarter of 2021, $0.1 million in aggregate principal amount of the Notes due 2025 were converted, and the principal amount of the converted Notes due 2025 was repaid in cash. In connection with such conversions during the second quarter of 2021, the Company also issued 485 shares of its common stock to the holders of the converted Notes due 2025, with an aggregate fair value of $0.1 million, representing the conversion value in excess of the principal amount of the Notes due 2025, which were fully offset by shares received from the settlements of the associated note hedging arrangements. Following the repurchase transactions summarized above, as of June 30, 2022, $102.2 million aggregate principal amount of the Notes due 2025 remained outstanding.

The following table presents the total amount of interest cost recognized relating to the Notes due 2025:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Contractual interest expense	$	64	$	64	$	128	$	214
Amortization of debt discount	1,088		1,033		2,137		3,422
Amortization of debt issuance costs	123		122		241		416
Total interest cost recognized	$	1,275	$	1,219	$	2,506	$	4,052

The derived effective interest rate on the Notes due 2025 host contract was determined to be 5.18%, which remains unchanged from the date of issuance. The remaining unamortized debt discount was $12.4 million as of June 30, 2022, and will be amortized over approximately 2.7 years from June 30, 2022.

Notes due 2025 Hedge and Warrant Transactions

In connection with the offering of the Notes due 2025, the Company entered into privately-negotiated convertible note hedge transactions (the “Notes due 2025 Hedge”) pursuant to which the Company has the option to purchase a total of approximately 3.9 million shares of its common stock (subject to anti-dilution adjustments), which is the same number of shares initially issuable upon conversion of the notes, at a price of $81.54 per share, which is the initial conversion price of the Notes due 2025. The total cost of the convertible note hedge transactions was approximately $89.1 million. The convertible note hedge transactions are expected generally to reduce potential dilution to the Company’s common stock upon any conversion of the Notes due 2025 and/or offset any cash payments the Company is required to make in excess of the principal amount of converted notes, as the case may be.

Additionally, the Company separately entered into privately-negotiated warrant transactions in connection with the offering of the Notes due 2025 whereby the Company sold the 2025 Warrants to acquire approximately 3.9 million shares of the Company’s common stock (subject to anti-dilution adjustments) at an initial strike price of $106.94 per share. The Company received aggregate proceeds of approximately $71.6 million from the sale of the 2025 Warrants. If the market value per share of the Company’s common stock, as measured under the 2025 Warrants, exceeds the strike price of the 2025 Warrants, the 2025 Warrants will have a dilutive effect on the Company’s earnings per share, unless the Company elects, subject to certain conditions, to settle the 2025 Warrants in cash. Taken together, the purchase of the convertible note hedges in connection with the Notes due 2025 Hedge and the sale of the 2025 Warrants are intended to reduce potential dilution from the conversion of the Notes due 2025 and to effectively increase the overall conversion price from $81.54 to $106.94 per share. The 2025 Warrants are only exercisable on the applicable expiration dates in accordance with the agreements relating to each of the 2025 Warrants. Subject to the other terms of the 2025 Warrants, the first expiration date applicable to the 2025 Warrants is June 1, 2025, and the final expiration date applicable to the 2025 Warrants is September 23, 2025.

Enphase Energy, Inc. | 2022 Form 10-Q | 28

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

During the first quarter of 2021, in connection with the repurchase of $217.7 million aggregate principal amount of the Notes due 2025 summarized above, the Company entered into partial unwind agreements with respect to certain of the Notes due 2025 Hedge and the 2025 Warrants. In connection with these unwind transactions, the Company received shares of the Company’s common stock as a termination payment for the portion of the Notes due 2025 Hedge that were unwound, and the Company issued shares of its common stock as a termination payment for the portion of the 2025 Warrants that were unwound. As a result of the unwind agreements for the Notes due 2025 Hedge and the 2025 Warrants, the Company received 1.9 million of the Company’s common stock from the Notes due 2025 Hedge settlement and issued 1.8 million of the Company’s common stock from the 2025 Warrants that were unwound. Following the unwind transactions summarized above, as of June 30, 2022, options to purchase approximately 1.3 million shares of common stock remained outstanding under the Notes due 2025 Hedge, and 2025 Warrants exercisable to purchase approximately 1.3 million shares remained outstanding.

For the period from March 9, 2020, the issuance date of the Notes due 2025 Hedge and 2025 Warrants, through May 19, 2020, the number of authorized and unissued shares of the Company’s common stock that are not reserved for other purposes was less than the maximum number of underlying shares that will be required to settle the Notes due 2025 through the delivery of shares of the Company’s common stock. Accordingly, the Notes due 2025 Hedge and 2025 Warrants could only be settled on net cash settlement basis. As a result, the Notes due 2025 Hedge and 2025 Warrants were classified as a Convertible notes hedge asset and 2025 Warrants liability, respectively, in the condensed consolidated balance sheet and the change in fair value of derivatives was included in other expense, net in the condensed consolidated statement of operations.

On May 20, 2020, at the Company’s annual meeting of stockholders, the stockholders approved the Amendment and satisfied the Share Reservation Condition (as discussed above), and as a result, the Convertible notes hedge asset and the 2025 Warrants liabilities were remeasured at a fair value of $117.1 million and $96.4 million, respectively, and were then reclassified to additional paid-in-capital in the condensed consolidated balance sheet in the second quarter of 2020 and is no longer remeasured as long as they continue to meet the conditions for equity classification. The change in the fair value of the Convertible notes hedge asset and the 2025 Warrants liability were recorded in other expense, net in the condensed consolidated statements of operations during the six months ended June 30, 2021.

Convertible Senior Notes due 2023

In August 2018, the Company sold $65.0 million aggregate principal amount of 4.0% convertible senior notes due 2023 (the “Notes due 2023”) in a private placement. On May 30, 2019, the Company entered into separately and privately-negotiated transactions with certain holders of the Notes due 2023 resulting in the repurchase and exchange, as of June 5, 2019, of $60.0 million aggregate principal amount of the notes in consideration for the issuance of 10,801,080 shares of common stock and separate cash payments totaling $6.0 million. As of both June 30, 2022 and December 31, 2021, $5.0 million aggregate principal amount of the Notes due 2023 remained outstanding.

The remaining outstanding Notes due 2023 are general unsecured obligations and bear interest at a rate of 4.0% per year, payable semi-annually on February 1 and August 1 of each year. The Notes due 2023 are governed by an indenture between the Company and U.S. Bank National Association, as trustee. The remaining outstanding Notes due 2023 will mature on August 1, 2023, unless earlier repurchased by the Company or converted at the option of the holders. The Company may not redeem the remaining Notes due 2023 prior to the maturity date, and no sinking fund is provided for such notes. The remaining Notes due 2023 are convertible, at a holder’s election, in multiples of $1,000 principal amount, into shares of the Company’s common stock based on the applicable conversion rate. The initial conversion rate for such notes is 180.018 shares of common stock per $1,000 principal amount of notes (which is equivalent to an initial conversion price of approximately $5.56 per share). The conversion rate and the corresponding conversion price are subject to adjustment upon the occurrence of certain events but will not be adjusted for any accrued and unpaid interest. Holders of the remaining Notes due 2023 who convert their notes in connection with a make-whole fundamental change (as defined in the applicable indenture) are, under certain circumstances, entitled to an increase in the conversion rate. Additionally, in the event of a fundamental change, holders of the remaining Notes due 2023 may require the Company to repurchase all or a portion of their notes at a price equal to 100% of the principal amount of notes, plus any accrued and unpaid interest, including any additional interest to, but excluding, the repurchase date. Holders may convert all or any

Enphase Energy, Inc. | 2022 Form 10-Q | 29

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

portion of their Notes due 2023 at their option at any time prior to the close of business on the business day immediately preceding the maturity date, in multiples of $1,000 principal amount.

The following table presents the amount of interest cost recognized relating to the contractual interest coupon and the amortization of debt issuance costs of the Notes due 2023:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Contractual interest expense	$	50	$	50	$	100	$	100
Amortization of debt issuance costs	10		10		20		20
Total interest costs recognized	$	60	$	60	$	120	$	120

10.    COMMITMENTS AND CONTINGENCIES

Operating Leases

The Company leases office facilities under noncancelable operating leases that expire on various dates through 2032, some of which may include options to extend the leases for up to 12 years.

The components of lease expense are presented as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Operating lease costs	$	2,052	$	1,815	$	3,989	$	3,446

The components of lease liabilities are presented as follows:

	June 30, 2022		December 31, 2021
	(In thousands except years and percentage data)
Operating lease liabilities, current (Accrued liabilities)	$	3,804	$	3,830
Operating lease liabilities, non-current (Other liabilities)	16,181		11,920
Total operating lease liabilities	$	19,985	$	15,750
Supplemental lease information:
Weighted average remaining lease term	5.8 years		5.9 years
Weighted average discount rate	6.3%		7.4%

Supplemental cash flow and other information related to operating leases, are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	1,325	$	1,425	$	2,843	$	2,786
Non-cash investing activities:
Lease liabilities arising from obtaining right-of-use assets	$	—	$	—	$	6,742	$	—

Enphase Energy, Inc. | 2022 Form 10-Q | 30

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Undiscounted cash flows of operating lease liabilities as of June 30, 2022 are as follows:

	Lease Amounts
	(In thousands)
Year:
2022 (remaining six months)	$	2,417
2023	5,141
2024	4,281
2025	3,577
2026	2,618
Thereafter	5,825
Total lease payments	23,859
Less: imputed lease interest	(3,874)
Total lease liabilities	$	19,985

Purchase Obligations

The Company has contractual obligations related to component inventory that its contract manufacturers procure on its behalf in accordance with its production forecast as well as other inventory related purchase commitments. As of June 30, 2022, these purchase obligations totaled approximately $439.4 million.

Litigation

From time-to-time, the Company may be involved in litigation relating to claims arising out of its operations, the ultimate disposition of which could have a material adverse effect on its operations, financial condition or cash flows. The Company is not currently involved in any material legal proceedings; however, the Company may be involved in material legal proceedings in the future. Such matters are subject to uncertainty and there can be no assurance that such legal proceedings will not have a material effect on its business, results of operations, financial position or cash flows.

Enphase Energy, Inc. | 2022 Form 10-Q | 31

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

11.    STOCK-BASED COMPENSATION

Stock-based Compensation Expense

Stock-based compensation expense for all stock-based awards, which includes stock options, restricted stock units (“RSUs”) and performance-based stock units (“PSUs”), expected to vest is measured at fair value on the date of grant and recognized ratably over the requisite service period.

In addition, as part of certain business acquisitions, the Company is obligated to issue shares of common stock of the Company as payment subject to achievement of certain targets. For such payments, the Company records stock-based compensation classified as post-combination expense ratably over the measurement period presuming the targets will be met.

The following table summarizes the components of total stock-based compensation expense included in the condensed consolidated statements of operations for the periods presented:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Cost of revenues	$	3,131	$	1,060	$	5,638	$	2,042
Research and development	16,266		5,467		29,995		11,216
Sales and marketing	22,176		5,335		35,233		8,872
General and administrative	11,491		3,450		29,995		8,026
Total	$	53,064	$	15,312	$	100,861	$	30,156

The following table summarizes the various types of stock-based compensation expense for the periods presented:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Stock options, RSUs and PSUs	$	47,228	$	14,361	$	91,340	$	28,201
Employee stock purchase plan	1,014		951		2,396		1,955
Post combination expense accrual (Accrued liabilities)	4,822		—		7,125		—
Total	$	53,064	$	15,312	$	100,861	$	30,156

As of June 30, 2022, there was approximately $319.8 million of total unrecognized stock-based compensation expense related to unvested equity awards, which are expected to be recognized over a weighted-average period of 2.3 years.

Enphase Energy, Inc. | 2022 Form 10-Q | 32

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Equity Awards Activity

Stock Options

The following table summarizes stock option activity:

	Number of Shares Outstanding	Weighted- Average Exercise Price per Share		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value (1)
	(In thousands)			(Years)	(In thousands)
Outstanding at December 31, 2021	2,264	$	1.90
Granted	—	—
Exercised	(360)	1.74			$	65,153
Canceled	(1)	8.82
Outstanding at June 30, 2022	1,903	$	1.93	2.4	$	367,918
Vested and expected to vest at June 30, 2022	1,903	$	1.93	2.4	$	367,918
Exercisable at June 30, 2022	1,903	$	1.93	2.4	$	367,918

(1)    The intrinsic value of options exercised is based upon the value of the Company’s stock at exercise. The intrinsic value of options outstanding, vested and expected to vest, and exercisable as of June 30, 2022 is based on the closing price of the last trading day during the period ended June 30, 2022. The Company’s stock fair value used in this computation was $195.24 per share.

The following table summarizes information about stock options outstanding at June 30, 2022:

	Options Outstanding				Options Exercisable
Range of Exercise Prices	Number of Shares	Weighted- Average Remaining Life	Weighted- Average Exercise Price		Number of Shares	Weighted- Average Exercise Price
	(In thousands)	(Years)			(In thousands)
$0.70 —– $1.11	479	2.8	$	0.80	479	$	0.80
$1.29 —– $1.29	1,000	2.2	1.29		1,000	1.29
$1.31 —– $5.53	380	2.0	2.15		380	2.15
$14.58 —– $14.58	33	3.8	14.58		33	14.58
$64.17 —– $64.17	11	4.8	64.17		11	64.17
Total	1,903	2.4	$	1.93	1,903	$	1.93

Enphase Energy, Inc. | 2022 Form 10-Q | 33

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Restricted Stock Units

The following table summarizes RSU activity:

	Number of Shares Outstanding	Weighted- Average Fair Value per Share at Grant Date		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value (1)
	(In thousands)			(Years)	(In thousands)
Outstanding at December 31, 2021	2,786	$	100.73
Granted	561	175.97
Vested	(916)	67.21			$	151,219
Canceled	(113)	139.67
Outstanding at June 30, 2022	2,318	130.32		1.2	$	452,664
Expected to vest at June 30, 2022	2,318	$	130.32	1.2	$	452,556

(1)    The intrinsic value of RSUs vested is based upon the value of the Company’s stock when vested. The intrinsic value of RSUs outstanding and expected to vest as of June 30, 2022 is based on the closing price of the last trading day during the period ended June 30, 2022. The Company’s stock fair value used in this computation was $195.24 per share.

Performance Stock Units

The following summarizes PSU activity:

	Number of Shares Outstanding	Weighted- Average Fair Value per Share at Grant Date		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value (1)
	(In thousands)			(Years)	(In thousands)
Outstanding at December 31, 2021	445	$	169.82
Granted	392	192.72
Vested	(303)	168.88			$	51,393
Canceled	(176)	170.96
Outstanding at June 30, 2022	358	$	195.14	0.7	$	69,900
Expected to vest at June 30, 2022	358	$	195.14	0.7	$	69,900

(1)    The intrinsic value of PSUs vested is based upon the value of the Company’s stock when vested. The intrinsic value of PSUs outstanding and expected to vest as of June 30, 2022 is based on the closing price of the last trading day during the period ended June 30, 2022. The Company’s stock fair value used in this computation was $195.24 per share.

12.    INCOME TAXES

For the three months ended June 30, 2022 and 2021, the Company’s income tax provision of $15.2 million and $7.0 million, respectively, on a net income before income taxes of $92.2 million and $46.3 million, respectively, and for the six months ended June 30, 2022, the Company’s income tax provision of $20.8 million on a net income before income taxes of $149.6 million was calculated using the annualized effective tax rate method and was primarily due to projected tax expense in the U.S. and foreign jurisdictions that are profitable, partially offset by tax deduction from employee stock compensation reported as a discrete event.

For the six months ended June 30, 2021, the Company’s income tax benefit of $26.4 million, on a net income before income taxes of $44.7 million calculated using the annualized effective tax rate method, was primarily due to tax deduction in the first quarter of 2021 from employee stock compensation reported as a discrete event, partially offset by projected tax expense in the U.S. and foreign jurisdictions that are profitable.

For the three and six months ended June 30, 2022 and 2021, in accordance with FASB guidance for interim reporting of income tax, the Company has computed its benefit (provision) for income taxes based on a projected annual effective tax rate while excluding loss jurisdictions which cannot be benefited.

Enphase Energy, Inc. | 2022 Form 10-Q | 34

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

13.    NET INCOME PER SHARE

Basic net income per share is computed by dividing net income by the weighted average number of shares of common stock outstanding during the period. Diluted net income per share is computed in a similar manner, but it also includes the effect of potential common shares outstanding during the period, when dilutive. Potential common shares include stock options, RSUs, PSUs, shares to be purchased under the Company’s 2011 Employee Stock Purchase Plan (the “ESPP”), the Notes due 2023, 1.0% convertible senior notes due 2024 (the “Notes due 2024”), Notes due 2025, Notes due 2026, Notes due 2028, and warrant transactions in connection with the offering of the Notes due 2024 (the “2024 Warrants”), 2025 Warrants, 2026 Warrants and the 2028 Warrants. See Note 9, “Debt,” for additional information about the Company’s outstanding notes.

The following table presents the computation of basic and diluted net income per share for the periods presented:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands, except per share data)
Numerator:
Net income	$	76,976	$	39,351	$	128,797	$	71,049
Convertible Senior Notes interest and financing costs, net	662		45		1,304		89
Adjusted net income	$	77,638	$	39,396	$	130,101	$	71,138
Denominator:
Shares used in basic per share amounts:
Weighted average common shares outstanding	135,196		135,094		134,768		133,209
Shares used in diluted per share amounts:
Weighted average common shares outstanding	135,196		135,094		134,768		133,209
Effect of dilutive securities:
Employee stock-based awards	3,042		4,554		3,399		5,177
Notes due 2023	900		900		900		900
Notes due 2024	—		45		—		1,506
2024 Warrants	—		43		—		1,268
Notes due 2025	—		557		—		1,137
2025 Warrants	512		340		460		825
Notes due 2026	2,057		—		2,057		—
Notes due 2028	2,018		—		2,018		—
Weighted average common shares outstanding for diluted calculation	143,725		141,533		143,602		144,022
Basic and diluted net income per share
Net income per share, basic	$	0.57	$	0.29	$	0.96	$	0.53
Net income per share, diluted	$	0.54	$	0.28	$	0.91	$	0.49

For the three and six months ended June 30, 2022, the dilutive effect of potentially dilutive common shares is reflected in diluted earnings per share by application of the treasury stock method for stock options, RSUs, PSUs, the 2025 Warrants, the 2026 Warrants and the 2028 Warrants. To the extent these potential common shares are antidilutive, they are excluded from the calculation of diluted net income per share.

Enphase Energy, Inc. | 2022 Form 10-Q | 35

ENPHASE ENERGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

For the three and six months ended June 30, 2022, due to adoption of ASU 2020-06 on January 1, 2022, the Company is no longer utilizing the treasury stock method for earnings per share impact for the Notes due 2025, Notes due 2026 and Notes due 2028. Instead, the Company is applying the if-converted method when reporting the number of potentially dilutive shares of common stock as the Company may at its election, settle its Convertible Senior Notes through payment or delivery, as the case may be, in cash, shares of its common stock or a combination of cash and shares of its common stock. Under this method, diluted earnings per share is determined by assuming that all of the Convertible Senior Notes were converted into shares of the Company’s common stock at the beginning of the reporting period.

Further, the Company under the relevant sections of the indentures, irrevocably may elect to settle principal in cash and any excess in cash or shares of the Company’s common stock for its Notes due 2025, Notes due 2026 and Notes due 2028. If and when the Company makes such election, there will be no adjustment to the net income and the Company will use the average share price for the period to determine the potential number of shares to be issued based upon assumed conversion to be included in the diluted share count.

Diluted earnings per share for the three and six months ended June 30, 2021 includes the dilutive effect of stock options, RSUs, PSUs, shares to be purchased under the ESPP, the Notes due 2023, the Notes due 2024, the 2024 Warrants, the Notes due 2025 and the 2025 Warrants. Certain common stock issuable under stock options, RSUs, PSUs, the Notes due 2026, the 2026 Warrants, the Notes due 2028 and the 2028 Warrants have been omitted from the diluted net income per share calculation because including such shares would have been antidilutive.

The following outstanding shares of common stock equivalents were excluded from the calculation of the diluted net income per share attributable to common stockholders because their effect would have been antidilutive:

	Three Months Ended June 30,		Six Months Ended June 30,
	2022	2021	2022	2021
	(In thousands)
Employee stock-based awards	572	178	598	88
Notes due 2028	—	1,902	—	1,234
2028 Warrants	2,425	3,457	2,735	2,264
Notes due 2026	—	2,255	—	1,468
2026 Warrants	2,471	3,457	2,788	2,264
Notes due 2025	1,253	—	1,253	—
Total	6,721	11,249	7,374	7,318

14.    RELATED PARTY

In 2018, a member of the Company’s board of directors and one of its principal stockholders, Thurman John Rodgers, purchased $5.0 million aggregate principal amount of the Notes due 2023 in a concurrent private placement. As of both June 30, 2022 and December 31, 2021, $5.0 million aggregate principal amount of the Notes due 2023 were outstanding. For additional information related to this purchase, see Note 9, “Debt,” for additional information related to this purchase.

Enphase Energy, Inc. | 2022 Form 10-Q | 36

Item 2.    Management’s Discussion and Analysis of Financial Condition and Results of Operations

Forward-Looking Statements

The following discussion and analysis of our financial condition and results of operations should be read together with our condensed consolidated financial statements and related notes appearing elsewhere in this Quarterly Report on Form 10-Q. This discussion contains forward-looking statements reflecting our current expectations and involves risks and uncertainties. In some cases, you can identify forward-looking statements by terminology such as “may,” “will,” “should,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “intend,” “potential” or “continue” or the negative of these terms or other comparable terminology. Such statements, include but are not limited to statements regarding our expectations as to future financial performance; expense levels; liquidity sources; the capabilities and performance of our technology and products and planned changes; timing of new product releases; our business strategies, including anticipated trends; growth and developments in markets in which we target; the anticipated market adoption of our current and future products; performance in operations, including component supply management; product quality and customer service; risks related to the ongoing COVID-19 pandemic; geo-political events, such as the conflict in Ukraine; and the anticipated benefits and risks relating to our recent acquisitions. You should be aware that the forward-looking statements contained in this report are based on our current views and assumptions, and are subject to known and unknown risks, uncertainties and other factors that may cause actual events or results to differ materially. For a discussion identifying some of the important factors that could cause actual results to vary materially from those anticipated in the forward-looking statements, see below, those discussed in the section entitled “Risk Factors” herein and those included in our Annual Report on Form 10-K for the year ended December 31, 2021 filed on February 11, 2022 (the “Form 10-K”). Unless the context requires otherwise, references in this report to “Enphase,” “we,” “us” and “our” refer to Enphase Energy, Inc. and its consolidated subsidiaries.

Business Overview

We are a global energy technology company. We deliver smart, easy-to-use solutions that manage solar generation, storage and communication on one platform. We revolutionized the solar industry with our microinverter technology and we produce a fully integrated solar-plus-storage solution. As of June 30, 2022, we have shipped more than 48 million microinverters, and approximately 2.5 million Enphase residential and commercial systems have been deployed in more than 140 countries.

The Enphase® Energy System™, powered by IQ® Microinverters and IQ™ Batteries, our current generation integrated solar, storage and energy management offering, enables self-consumption and delivers our core value proposition of yielding more energy, simplifying design and installation, and improving system uptime and reliability. The IQ family of microinverters, like all of our previous microinverters, is fully compliant with NEC 2014 and 2017 rapid shutdown requirements. Unlike string inverters, this capability is built-in, with no additional equipment necessary.

The Enphase Energy System brings a high technology, networked approach to solar generation plus energy storage, by leveraging our design expertise across power electronics, semiconductors and cloud-based software technologies. Our integrated approach to energy solutions maximizes a home’s energy potential while providing advanced monitoring and remote maintenance capabilities. The Enphase Energy System with IQ uses a single technology platform for seamless management of the whole solution, enabling rapid commissioning with the Enphase® Installer App; consumption monitoring with IQ™ Gateway with IQ Combiner+™, Enphase® App, a cloud-based energy management platform, and our IQ™ Battery. System owners can use the Enphase App to monitor their home’s solar generation, energy storage and consumption from any web-enabled device. Unlike some of our competitors, who utilize a traditional inverter, or offer separate components of solutions, we have built-in system redundancy in both photovoltaic generation and energy storage, eliminating the risk that comes with a single point of failure. Further, the nature of our cloud-based, monitored system allows for remote firmware and software updates, enabling cost-effective remote maintenance and ongoing utility compliance.

In March 2022, we completed the acquisition of SolarLeadFactory, LLC. (“SolarLeadFactory”), a privately-held company. SolarLeadFactory provides high quality leads to solar installers. As part of the purchase price, we paid approximately $26.1 million in cash on March 14, 2022. In addition to the purchase price paid, we are obligated to pay up to approximately $10.0 million in shares of our common stock in the second quarter of 2023 subject to achievement of certain operational and employment targets.

Further details on the above acquisition may be found in Note 4, “Business Combinations,” in the notes to the condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.

Enphase Energy, Inc. | 2022 Form 10-Q | 37

Impact of the COVID-19 Pandemic

We continue to monitor, evaluate and respond to developments relating to the COVID-19 pandemic, which has resulted in, and is expected to continue to result in manufacturing or supply chain problems, disruptions in local and global economies, volatility in the global financial markets, overall reductions in demand, delays in payment, restrictions on the shipment of our products, or other ramifications. We have reopened some of our offices, but a majority of our employees continue to work remotely. We continue to take meaningful precautions in accordance with relevant guidelines to protect the health and safety of our employees. The extent of the continuing impact of COVID-19 on our operational and financial performance will depend on various developments, including the duration and spread of the virus and its variants, impact on our end-customers’ spending, volume of sales, impact on our partners, suppliers and employees, and actions that may be taken by governmental authorities, including the effects of recent government-mandated lockdowns in several cities in China. If the COVID-19 pandemic or its adverse effects become more severe or prevalent or are prolonged in the locations where we, our customers, suppliers or manufacturers conduct business, or we experience more pronounced disruptions in our business or operations, or in economic activity and demand for our products and services generally, our business and results of operations in future periods could be materially adversely affected. Further information relating to the risks and uncertainties related to the ongoing COVID-19 pandemic may be found in Part I, Item 1A “Risk Factors” of the Form 10-K.

Supply Chain Constraints

Due to increased demand across a range of industries, the global supply chain and the semiconductor industry have experienced significant disruptions in recent periods. We have seen supply chain challenges and logistics constraints increase, including component shortages, which have, in certain cases, caused delays in critical components and inventory, longer lead times, and have resulted in increased costs. We believe these supply chain challenges will persist for the foreseeable future. In addition, the impact of inflation on the price of components, raw materials and labor has increased.

We continue to work to mitigate the effects from supply chain constraints. Given the dynamic nature of these circumstances on our ongoing business, results of operations and overall financial performance, the full impact of COVID-19 and other macroeconomic factors, including the conflict in Ukraine, cannot be reasonably estimated at this time. In the event we are unable to mitigate the impact of delays and/or price increases in raw materials, electronic components and freight, it could delay the manufacturing and installation of our products, which would adversely impact our cash flows and results of operations, including revenue and gross margin.

Products

Our Enphase IQ Battery storage systems, with usable and scalable capacity of 10.1 kWh and 3.4 kWh, based on Ensemble OS™ energy management technology, which powers the world’s first grid-independent microinverter-based storage system to customers in North America, have been shipping since the second quarter of 2020. The Enphase IQ Battery storage systems feature our embedded grid-forming microinverters that enable the Always-On capability that keeps homes powered when the grid goes down, and the ability to save money when the grid is up. These systems are now compatible with both new and existing Enphase IQ solar systems with M-series™, IQ6™ and IQ7™ microinverters. In January 2021, we announced expanded compatibility of the Enphase® Energy System™ with our M-series microinverters and string inverters. The expanded compatibility provides approximately 300,000 additional Enphase system owners with the possibility of achieving grid-agnostic energy resilience through the Enphase Upgrade Program. The program provides solar installers the opportunity to renew engagements with the installed base of Enphase system owners through microinverter, solar, and energy storage upgrades, and reflects our continued commitment to reliability, service, and long-term customer relationships. We currently ship our Enphase IQ Battery storage systems to customers in North America, Germany and Belgium. Enphase IQ Batteries in Germany and Belgium can be installed with both single-phase and three-phase third-party solar energy inverters, enabling homeowners to upgrade their existing home solar systems with a residential battery storage solution that reduces costs while providing increased self-reliance. We plan to introduce Enphase IQ Batteries in other European countries throughout 2022.

During the second quarter of 2021, we introduced IQ™ Load Controller for our Enphase IQ Battery storage systems. Load control allows homeowners to decide what gets power in their home in the event of a grid outage, with the ability to choose up to four loads. These loads will be on when the grid is present and shed automatically in the event of a grid failure. We began shipping our IQ Load Controller, which includes updated features, in December 2021.

Enphase Energy, Inc. | 2022 Form 10-Q | 38

Our Enphase Energy System integrates with most leading models of home standby AC generators, providing enhanced performance and a glitch-free transition for homeowners during power outages. Homeowners can also monitor real-time power flow, start and stop their generator remotely, set quiet hours to prevent their generator from operating until their batteries fall below a designated threshold, and control it all with the Enphase® App. The new feature functions without a generator automatic transfer switch and is designed to eliminate the power glitches that reset home electronic appliances when switching to generator power.

We began shipping our Enphase Energy System with IQ8™ microinverters in the fourth quarter of 2021 to customers in North America. Our investment in custom application specific integrated circuit chips has resulted in a software-defined microinverter smart enough to form a microgrid. Many homeowners often assume that their solar systems will function if the sun is shining, even during a power outage. This has unfortunately not been true until the introduction of IQ8. Now, with IQ8 homeowners can realize the true promise of solar — to make and use their own power. IQ8 solar microinverters can provide Sunlight Backup™ during an outage, even without a battery.

In the second quarter of 2022 the Enphase IQ8 Microinverter-based system was certified by UL, a global safety science leader, for the new North American safety and grid interconnection standards for connecting solar inverters, energy storage systems, and distributed energy resources to the grid.

We participate in the ConnectedSolutions program, which is an incentive program implemented by two utilities in the Northeast region of the United States to reduce electrical demand during high-use periods. Enphase Storage customers in Connecticut, Massachusetts and Rhode Island can sign-up, monitor, track money earned, and control participation in the program using the Enphase App. We announced during the third quarter of 2021 our participation in Hawaiian Electric’s Battery Bonus grid services program. This program offers a new incentive for homeowners on the island of Oahu to install a new home battery. During the fourth quarter of 2021, we announced our participation in the Arizona Public Service (“APS”) residential battery services program. The APS program offers homeowners who install Enphase IQ Batteries in its service territory the chance to participate and earn money through one-time, upfront incentives. In addition, we announced during the first quarter of 2022 that the Vermont-based utility Green Mountain Power (“GMP”) will offer Enphase Energy Systems to its customers in a cutting-edge battery lease grid services pilot program. Homeowners can also enroll in GMP’s “Bring Your Own Device” grid services program, which enables customers with their own Enphase Energy Systems to participate and earn an up-front incentive. These grid services programs enable utilities to leverage the IQ Battery instead of turning on polluting peaker plants, while generating an income stream for the IQ Battery owner. Facilitating grid services participation for our customers intended to reduce the lifetime cost of IQ Batteries and help drive increased demand.

Results of Operations

Net Revenues

	Three Months Ended June 30,				Change in				Six Months Ended June 30,				Change in
	2022		2021		$		%		2022		2021		$		%
	(In thousands, except percentages)
Net revenues	$	530,196	$	316,057	$	214,139	68	%	$	971,488	$	617,811	$	353,677	57	%

Three months ended June 30, 2022 and 2021

Net revenues increased by 68%, or $214.1 million, in the three months ended June 30, 2022, as compared to the same period in 2021, driven primarily by a 42% increase in microinverter units volume shipped and a 205% increase in Enphase IQ Battery Megawatt-hour (“MWh”) shipped. In the three months ended June 30, 2022, consumer demand increased and component supply improved as we sold approximately 3.3 million microinverter units, as compared to approximately 2.4 million units in the three months ended June 30, 2021. In the three months ended June 30, 2022, we also increased shipments of our Enphase IQ Batteries to customers in the United States and Europe to 132.4 MWh as compared to 43.4 MWh shipped in the same period in 2021. The average selling price of our microinverter products increased by 18% in the three months ended June 30, 2022, as compared to the same period in 2021, primarily driven by a favorable product mix as we sold more IQ8 and IQ7+™ microinverters relative to IQ7 microinverters in the three months ended June 30, 2022 and increased prices for our product offerings in the second half of 2021 to partially offset the impact of higher logistics costs and component costs from global supply chain pricing pressures.

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Six months ended June 30, 2022 and 2021

Net revenues increased by 57%, or $353.7 million, in the six months ended June 30, 2022, as compared to the same period in 2021, driven primarily by a 28% increase in microinverter units volume shipped and a 196% increase in Enphase IQ Battery MWh shipped. In the six months ended June 30, 2022, consumer demand increased and component supply improved, as we sold approximately 6.2 million microinverter units, as compared to approximately 4.8 million units in the six months ended June 30, 2021. In the six months ended June 30, 2022, we also increased shipments of our Enphase IQ Batteries to customers in the United States and Europe to 252.8 MWh, as compared to 85.4 MWh shipped in the same period in 2021. The average selling price of our microinverter products increased by 16% in the six months ended June 30, 2022, as compared to the same period in 2021, primarily driven by a favorable product mix, as we sold more IQ8 and IQ7+ microinverters relative to IQ7 microinverters in the six months ended June 30, 2022 and increased prices for our product offerings in the second half of 2021 to partially offset the impact of higher logistics costs and component costs from global supply chain pricing pressures.

Cost of Revenues and Gross Margin

	Three Months Ended June 30,						Change in				Six Months Ended June 30,						Change in
	2022			2021			$		%		2022			2021			$		%
	(In thousands, except percentages)
Cost of revenues	$	311,191		$	188,256		$	122,935	65	%	$	575,510		$	367,061		$	208,449	57	%
Gross profit	$	219,005		$	127,801		$	91,204	71	%	$	395,978		$	250,750		$	145,228	58	%
Gross margin	41.3		%	40.4		%			0.9	%	40.8		%	40.6		%			0.2	%

Three months ended June 30, 2022 and 2021

Cost of revenues increased by 65%, or $122.9 million, in the three months ended June 30, 2022, as compared to the same period in 2021, primarily due to higher volume of microinverter units sold, higher Enphase IQ Battery MWh shipped, higher shipping costs of our products due to supply chain disruptions and constraints globally. The increase was also due to $1.4 million higher amortization of developed technology and $2.1 million higher stock-based compensation.

Gross margin increased by 0.9 percentage points in the three months ended June 30, 2022, as compared to the same period in 2021. The increase was primarily due to product mix as we sold more IQ8 and IQ7+™ microinverters relative to IQ7 microinverters in the three months ended June 30, 2022, an increase in average selling prices driven by favorable product mix and price increases to our products, as well as cost management effort. This increase was partially offset by higher shipping costs of our products due to supply chain disruptions globally in combination with semiconductor supply constraints, $1.4 million higher amortization of developed technology and $2.1 million higher stock-based compensation.

Six months ended June 30, 2022 and 2021

Cost of revenues increased by 57%, or $208.4 million, in the six months ended June 30, 2022, as compared to the same period in 2021, primarily due to higher volume of microinverter units sold, higher Enphase IQ Battery MWh shipped and higher shipping costs of our products due to supply chain disruptions and constraints globally. The increase was also due to $2.7 million higher amortization of developed technology and $3.6 million higher stock-based compensation.

Gross margin increased by 0.2 percentage points in the six months ended June 30, 2022, as compared to the same period in 2021. The increase was primarily due to product mix, as we sold more IQ8 and IQ7+ microinverters relative to IQ7 microinverters in the six months ended June 30, 2022, an increase in average selling prices driven by favorable product mix and price increases to our products, as well as cost management effort. The increase was partially offset by higher shipping costs of our products due to supply chain disruptions globally in combination with semiconductor supply constraints, $2.7 million higher amortization of developed technology and $3.6 million higher stock-based compensation.

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Research and Development

	Three Months Ended June 30,						Change in				Six Months Ended June 30,						Change in
	2022			2021			$		%		2022			2021			$		%
	(In thousands, except percentages)
Research and development	$	39,256		$	22,708		$	16,548	73	%	$	74,975		$	44,526		$	30,449	68	%
Percentage of net revenues	7		%	7		%					8		%	7		%

Three months ended June 30, 2022 and 2021

Research and development expense increased by 73%, or $16.5 million, in the three months ended June 30, 2022, as compared to the same period in 2021. The increase was primarily due to $16.3 million of higher personnel-related expenses and $0.2 million of outside consulting services and equipment expense associated with our investment in the development, introduction and qualification of new product innovation. The increase in personnel-related expenses was primarily due to hiring and retention programs for employees in New Zealand, India and the United States, which increased total compensation costs, including stock-based compensation. The amount of research and development expenses may fluctuate from period to period due to the differing levels and stages of development activity.

Six months ended June 30, 2022 and 2021

Research and development expense increased by 68%, or $30.4 million, in the six months ended June 30, 2022, as compared to the same period in 2021. The increase was primarily due to $28.4 million of higher personnel-related expenses and $1.6 million of outside consulting services and equipment expense associated with our investment in the development, introduction and qualification of new product innovation. The increase in personnel-related expenses was primarily due to hiring and retention programs for employees in New Zealand, India and the United States, which increased total compensation costs, including stock-based compensation. The amount of research and development expenses may fluctuate from period to period due to the differing levels and stages of development activity.

Sales and Marketing

	Three Months Ended June 30,						Change in				Six Months Ended June 30,						Change in
	2022			2021			$		%		2022			2021			$		%
	(In thousands, except percentages)
Sales and marketing	$	53,588		$	25,586		$	28,002	109	%	$	94,932		$	45,208		$	49,724	110	%
Percentage of net revenues	10		%	8		%					10		%	7		%

Three months ended June 30, 2022 and 2021

Sales and marketing expense increased by 109%, or $28.0 million, in the three months ended June 30, 2022, as compared to the same period in 2021. The increase was primarily due to $25.4 million of higher personnel-related expenses from increased headcount as a result of our efforts to improve customer experience, to provide 24/7 support along with a field service desk for installers and Enphase system owners globally, and to support our business growth in the United States and international expansion in Europe. In addition, annual retention programs for employees also resulted in the increase in total compensation costs, including stock-based compensation. The increase in sales and marketing expense in the three months ended June 30, 2022, as compared to the same period in 2021, was also attributable to $2.0 million higher amortization of intangible assets acquired through business combinations and $0.6 million of higher professional services and facility costs to enable business growth.

Six months ended June 30, 2022 and 2021

Sales and marketing expense increased by 110%, or $49.7 million, in the six months ended June 30, 2022, as compared to the same period in 2021. The increase was primarily due to $42.9 million of higher personnel-related expenses from increased headcount as a result of our efforts to improve customer experience, to provide 24/7 support along with a field service desk for installers and Enphase system owners globally, and to support our business growth in the United States and international expansion in Europe. In addition, annual retention programs

Enphase Energy, Inc. | 2022 Form 10-Q | 41

for employees also resulted in the increase in total compensation costs, including stock-based compensation. The increase in sales and marketing expense in the six months ended June 30, 2022, as compared to the same period in 2021, was also attributable to $4.4 million higher amortization of intangible assets acquired through business combinations and $2.3 million of higher professional services and facility costs to enable business growth

General and Administrative

	Three Months Ended June 30,						Change in				Six Months Ended June 30,						Change in
	2022			2021			$		%		2022			2021			$		%
	(In thousands, except percentages)
General and administrative	$	32,125		$	20,107		$	12,018	60	%	$	70,211		$	40,230		$	29,981	75	%
Percentage of net revenues	6		%	6		%					7		%	7		%

Three months ended June 30, 2022 and 2021

General and administrative expense increased by 60%, or $12.0 million, in the three months ended June 30, 2022, as compared to the same period in 2021. The increase was primarily due to $7.1 million of higher personnel-related expenses from increased headcount increasing total compensation costs, including stock-based compensation and post business combination employment-related expense, $2.6 million of investments in technological infrastructure and other operational and facilities costs to support scalability of our business growth, $1.5 million of higher legal and professional services and $1.2 million of asset impairment, partially offset by a $0.5 million decrease in acquisition-related costs.

Six months ended June 30, 2022 and 2021

General and administrative expense increased by 75%, or $30.0 million, in the six months ended June 30, 2022, as compared to the same period in 2021. The increase was primarily due to $25.0 million of higher personnel-related expenses as a result of an increase in headcount increasing total compensation costs, including stock-based compensation and post business combination employment-related expense, $4.6 million of investments in technological infrastructure and other operational and facilities costs to support scalability of our business growth, $2.1 million of higher legal and professional services and $1.2 million of asset impairment, partially offset by a decrease of $3.1 million of acquisition-related costs.

Other Income (Expense), Net

	Three Months Ended June 30,				Change in				Six Months Ended June 30,				Change in
	2022		2021		$		%		2022		2021		$		%
	(In thousands, except percentages)
Interest income	$	796	$	98	$	698	712	%	$	1,256	$	171	$	1,085	635	%
Interest expense	(2,168)		(12,506)		10,338		(83)	%	(4,904)		(19,835)		14,931		(75)	%
Other expense, net	(456)		(633)		177		(28)	%	(2,597)		(60)		(2,537)		4,228	%
Loss on partial settlement of convertible notes	—		(13)		13		(100)	%	—		(56,382)		56,382		(100)	%
Total other expense, net	$	(1,828)	$	(13,054)	$	11,226	(86)	%	$	(6,245)	$	(76,106)	$	69,861	(92)	%

Three months ended June 30, 2022 and 2021

Interest income of $0.8 million in the three months ended June 30, 2022 increased, as compared to $0.1 million for the three months ended June 30, 2021, was primarily due to an increase in interest rates earned on cash, cash equivalents and marketable securities in the three months ended June 30, 2022, as compared to the same period in 2021.

Cash interest expense

Cash interest expense in each of the three months ended June 30, 2022 and 2021 totaled $0.1 million. Cash interest expense in the three months ended June 30, 2022 primarily includes $0.1 million interest incurred with the Notes due 2025 and Notes due 2023. Cash interest expense in the three months ended June 30, 2021 primarily

Enphase Energy, Inc. | 2022 Form 10-Q | 42

includes approximately $0.1 million coupon interest incurred with our Notes due 2025, Notes due 2024 and Notes due 2023 and less than approximately $0.1 million accretion of interest expense on contingent consideration.

Non-cash interest expense

Non-cash interest expense of $2.1 million in the three months ended June 30, 2022 primarily related to $2.1 million for the debt discount amortization with our Notes due 2025 and amortization of debt issuance costs with our Notes due 2023, Notes due 2025, Notes due 2026 and Notes due 2028. Non-cash interest expense of $12.3 million in the three months ended June 30, 2021 primarily relates to $12.3 million for the debt discount and amortization of debt issuance costs with our Notes due 2024, Notes due 2025, Notes due 2026 and Notes due 2028 and less than approximately $0.1 million relates to the amortization of debt issuance costs associated with Notes due 2023.

Other expense, net of $0.5 million expense in the three months ended June 30, 2022 relates to a $1.5 million net loss related to foreign currency denominated monetary assets and liabilities, partially offset by $1.0 million non-cash net gain related to change in the fair value of debt securities. Other (expense) income, net of $0.6 million expense in the three months ended June 30, 2021, relates to a $1.5 million net loss related to foreign currency exchange and remeasurement, partially offset by $0.9 million non-cash gain related to the change in the fair value of debt securities.

Six months ended June 30, 2022 and 2021

Interest income of $1.3 million in the six months ended June 30, 2022 increased, as compared to $0.2 million for the six months ended June 30, 2021, primarily due to an increase in interest rates earned on cash, cash equivalents and marketable securities in the six months ended June 30, 2022, as compared to the same period in 2021.

Cash interest expense

Cash interest expense in the six months ended June 30, 2022 and 2021 totaled $0.9 million and $0.4 million, respectively. Cash interest expense in the six months ended June 30, 2022 primarily includes $0.8 million interest incurred with the Notes due 2025 and Notes due 2023, and $0.1 million accretion of interest expense on contingent consideration for an acquisition. Cash interest expense in the six months ended June 30, 2021 primarily includes $0.3 million coupon interest incurred with our Notes due 2025, Notes due 2024 and Notes due 2023 and $0.1 million accretion of interest expense on contingent consideration.

Non-cash interest expense

Non-cash interest expense of $4.0 million in the six months ended June 30, 2022 primarily related to $4.0 million for the debt discount amortization with our Notes due 2025 and amortization of debt issuance costs with our Notes due 2023, Notes due 2025, Notes due 2026 and Notes due 2028. Non-cash interest expense of $19.5 million in the six months ended June 30, 2021 primarily relates to $19.4 million for the debt discount and amortization of debt issuance costs with our Notes due 2024, Notes due 2025, Notes due 2026 and Notes due 2028 and less than $0.1 million relates to the amortization of debt issuance costs associated with Notes due 2023.

Other expense, net of $2.6 million expense in the six months ended June 30, 2022 relates to $2.2 million net loss related to foreign currency denominated monetary assets and liabilities, $0.3 million impairment of note receivable and $0.1 million non-cash net loss related to change in the fair value of debt securities. Other (expense) income, net of less than $0.1 million expense in the six months ended June 30, 2021, related to a $2.4 million net loss related to foreign currency exchange and remeasurement, partially offset by $2.3 million non-cash gain related to change in the fair value of debt securities.

Loss on partial settlement of convertible notes recorded in the six months ended June 30, 2021 primarily related to the $9.5 million non-cash loss on partial settlement of $87.1 million aggregate principal amount of the Notes due 2024, $9.5 million non-cash loss on partial settlement of $217.8 million aggregate principal amount of the Notes due 2025 and $37.5 million non-cash inducement loss incurred on repurchase of Notes due 2025. We did not have any such loss in the six months ended June 30, 2022.

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Income Tax (Provision) Benefit

	Three Months Ended June 30,				Change in				Six Months Ended June 30,				Change in
	2022		2021		$		%		2022		2021		$		%
	(In thousands, except percentages)
Income tax (provision) benefit	$	(15,232)	$	(6,995)	$	(8,237)	118	%	$	(20,818)	$	26,369	$	(47,187)	(179)	%

Three months ended June 30, 2022 and 2021

The income tax provision of $15.2 million in the three months ended June 30, 2022 increased, as compared to the income tax provision of $7.0 million in the same period in 2021, both calculated using the annualized effective tax rate method, primarily due to higher projected tax expense in U.S. and foreign jurisdictions that are more profitable in 2022 compared to 2021, partially offset by tax deduction from employee stock-based compensation.

Six months ended June 30, 2022 and 2021

The income tax provision of $20.8 million in the six months ended June 30, 2022 was calculated using the annualized effective tax rate method, primarily relates to higher projected tax expense in U.S. and foreign jurisdictions that are more profitable in 2022, partially offset by tax deduction from employee stock-based compensation.

The income tax benefit of $26.4 million for the six months ended June 30, 2021 was calculated using the annualized effective tax rate method, primarily relates to higher tax deduction from employee stock-based compensation, partially offset by higher projected tax expense in foreign jurisdictions that are profitable in 2021.

Liquidity and Capital Resources

Sources of Liquidity

As of June 30, 2022, we had $1.3 billion in net working capital, including cash, cash equivalents and marketable securities of $1.2 billion, of which approximately $1.2 billion were held in the United States. Our cash, cash equivalents and marketable securities primarily consist of U.S. treasuries, money market mutual funds, corporate notes and bonds and both interest-bearing and non-interest-bearing deposits, with the remainder held in various foreign subsidiaries. We consider amounts held outside the United States to be accessible and have provided for the estimated U.S. income tax liability associated with our foreign earnings.

	Six Months Ended June 30,				Change in
	2022		2021		$		%
	(In thousands, except percentages)
Cash, cash equivalents and marketable securities	$	1,247,801	$	1,312,261	$	(64,460)	(5)	%
Total Debt	1,286,215		1,014,140		272,075		27	%

Our cash, cash equivalents and marketable securities decreased by $64.5 million in the six months ended June 30, 2022, compared to the same period in 2021, primarily due to use of cash to fund acquisitions, repurchase shares of our common stock, make investments in private companies, and make payments of withholding taxes related to net share settlement of equity awards, partially offset by cash generated from operations.

Total carrying amount of debt increased by $272.1 million in the six months ended June 30, 2022, as compared to the same period in 2021, primarily due to adoption of ASU 2020-06 as of January 1, 2022, partially offset by repayment of the Notes due 2024 and partial repayment of the Notes due 2025. Refer to Note 1, “Description of Business and Basis of Presentation - Recently Adopted Accounting Pronouncements” in this Quarterly Report on Form 10-Q for further information on adoption of ASU 2020-06.

We had net operating loss carryforwards for federal and California income tax purposes of approximately $153.9 million and $92.8 million, respectively, as well as federal and state research credit carryforwards of approximately $17.3 million and $9.8 million, respectively, as of December 31, 2021. When we utilize all of our net operating loss and research credit carryforwards, which we expect to occur within the next twelve months from June 30, 2022, our cash paid for taxes in the U.S. will substantially increase.

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We plan to fund any cash requirements from our existing cash, cash equivalents and marketable securities on hand, and cash generated from operations. We anticipate that the debt market will be more limited compared to prior years as interest rates are expected to rise. Our ability to obtain debt or any other additional financing that we may choose to, or need to, obtain will depend on, among other things, our development efforts, business plans, operating performance and the condition of the capital markets at the time we seek financing.

Cash from operations could be affected by various risks and uncertainties, including, but not limited to, the continued effects of COVID-19, the ongoing conflict in Ukraine and other risk factors discussed in the section entitled “Risk Factors” herein and those included in the Form 10-K. We believe that our cash flow from operations with existing cash, cash equivalents and marketable securities will be sufficient to meet our anticipated cash needs for working capital and capital expenditures for at least the next 12 months and thereafter for the foreseeable future, including our ability to make payment on our outstanding debt.

Our future capital requirements will depend on many factors including our growth rate, the timing and extent of spending to support development efforts, the expansion of sales and marketing activities, the introduction of new and enhanced products, the costs to acquire or invest in complementary businesses and technologies, the costs to ensure access to adequate manufacturing capacity, the continuing market acceptance of our products and macroeconomic events, such as the impacts from the COVID-19 pandemic, inflation, and the ongoing conflict in Ukraine. We may also choose to seek additional equity or debt financing. In the event that additional financing is required from outside sources, we may not be able to raise it on terms acceptable to us or at all. If we are unable to raise additional capital when desired, our business, operating results and financial condition may be adversely affected.

Repurchase of Common Stock. In May 2021, our board of directors authorized a share repurchase program (the “2021 Repurchase Program”) pursuant to which we may repurchase up to an additional $500.0 million of our common stock. The repurchases may be executed from time to time, subject to general business and market conditions and other investment opportunities, through open market purchases or privately negotiated transactions, including through Rule 10b5-1 plans. Such purchases are expected to continue through May 2024 unless otherwise extended or shortened by our board of directors. As of June 30, 2022, we have approximately $200.0 million remaining for repurchase of shares under the 2021 Repurchase Program.

Cash Flows. The following table summarizes our cash flows for the periods presented:

	Six Months Ended June 30,
	2022		2021
	(In thousands)
Net cash provided by operating activities	$	303,093	$	141,501
Net cash provided by (used in) investing activities	84,226		(126,607)
Net cash provided by (used in) financing activities	(10,220)		618,914
Effect of exchange rate changes on cash	(942)		(926)
Net increase in cash and cash equivalents	$	376,157	$	632,882

Cash Flows from Operating Activities

Cash flows from operating activities consist of our net income adjusted for certain non-cash reconciling items, such as stock-based compensation expense, change in the fair value of investments, deferred income taxes, depreciation and amortization and changes in our operating assets and liabilities. Net cash provided by operating activities increased by $161.6 million in the six months ended June 30, 2022, as compared to the same period in 2021, primarily due to an increase in our gross profit as a result of increased revenue, partially offset by higher operating expenses as we continue to invest in the long-term growth of our business.

Cash Flows from Investing Activities

For the six months ended June 30, 2022, net cash provided from investing activities of $84.2 million was primarily from $193.0 million maturities of marketable securities, partially offset by $60.1 million purchase of marketable securities, $27.7 million net cash used to acquire SolarLeadFactory and Clipper Creek, Inc., and $21.1 million used in purchases of test and assembly equipment to expand our supply capacity, related facility improvements and information technology enhancements including capitalized costs related to internal-use software.

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For the six months ended June 30, 2021, net cash used in investing activities of $126.6 million was primarily from $55.3 million net cash used to acquire Sofdesk Inc. and DIN Engineer Service LLP’s solar design services business, $45.0 million from the investment in a debt security, and $26.4 million used in purchases of test and assembly equipment to expand our supply capacity, related facility improvements and information technology enhancements including capitalized costs related to internal-use software.

Cash Flows from Financing Activities

For the six months ended June 30, 2022, net cash used by financing activities of approximately $10.2 million was primarily due to $14.8 million payment of employee withholding taxes related to net share settlement of equity awards, partially offset by $4.6 million net proceeds from employee stock option exercises and purchases under our employee stock purchase plan.

For the six months ended June 30, 2021, net cash provided by financing activities of approximately $618.9 million was primarily from $1,188.4 million net proceeds from the issuance of our Notes due 2028 and Notes due 2026, $220.8 million from sale of warrants related to our Notes due 2028 and Notes due 2026 and $3.6 million net proceeds from employee stock option exercises, partially offset by $286.2 million purchase of convertible note hedge related to our Notes due 2028 and Notes due 2026, $289.3 million cash paid to settle both $87.1 million in aggregate principal amount of the Notes due 2024 and $217.8 million in aggregate principal amount of the Notes due 2025, $200.0 million paid to repurchase shares of our common stock, $17.0 million payment of employee withholding taxes related to net share settlement of equity awards, and $1.4 million of repayment on sale of long-term financing receivables.

Contractual Obligations

Our contractual obligations primarily consist of our Notes due 2028, Notes due 2026, Notes due 2025, Notes due 2023, obligations under operating leases and inventory component purchase. As of June 30, 2022, there have been no material changes from our disclosure in the Form 10-K. For more information on our future minimum operating leases and inventory component purchase obligations as of June 30, 2022, see Note 10, “Commitments and Contingencies - Purchase Obligations” and for more information on our notes and other related debt, see Note 9, “Debt” of the notes to condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.

Critical Accounting Policies

Our condensed consolidated financial statements are prepared in accordance with accounting principles generally accepted in the U.S. (“GAAP”). In connection with the preparation of our condensed consolidated financial statements, we are required to make assumptions and estimates about future events and apply judgments that affect the reported amounts of assets, liabilities, revenue, expenses and related disclosures. We base our assumptions, estimates and judgments on historical experience, current trends and other factors that management believes to be relevant at the time our condensed consolidated financial statements are prepared. On a regular basis, we review the accounting policies, assumptions, estimates and judgments to ensure that our condensed consolidated financial statements are presented fairly and in accordance with GAAP. However, because future events and their effects cannot be determined with certainty, actual results could differ from our assumptions and estimates. To the extent that there are material differences between these estimates and actual results, our future financial statement presentation, financial condition, results of operations and cash flows will be affected.

We consider an accounting policy to be critical if it requires an accounting estimate to be made based on assumptions about matters that are highly uncertain at the time the estimate is made, and if different estimates that reasonably could have been used, or changes in the accounting estimates that are reasonably likely to occur periodically, could materially impact the condensed consolidated financial statements.

Adoption of New and Recently Issued Accounting Pronouncements

Refer to Note 1, “Description of Business and Basis of Presentation - Summary of Significant Accounting Policies” of the notes to condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q for a discussion of adoption of new and recently issued accounting pronouncements.

Enphase Energy, Inc. | 2022 Form 10-Q | 46

Item 3.    Quantitative and Qualitative Disclosures About Market Risk

There have been no material changes in our market risk compared to the disclosures in Part II, Item 7A, “Quantitative and Qualitative Disclosures About Market Risk” in the Form 10-K. Also see the section entitled “Risk Factors” in Part I, Item 1A in the Form 10-K.

Enphase Energy, Inc. | 2022 Form 10-Q | 47

Item 4.    Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of June 30, 2022. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) includes, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure. Based on the evaluation of our disclosure controls and procedures as of June 30, 2022, our Chief Executive Officer and Chief Financial Officer concluded that, as of such date, our disclosure controls and procedures were effective.

Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

Changes in Internal Control

There were no changes in our internal control over financial reporting identified in management’s evaluation pursuant to Rules 13a-15(d) or 15d-15(d) of the Exchange Act during the period covered by this Quarterly Report on Form 10-Q that has materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. During the quarter ended June 30, 2022, we migrated to a new Enterprise Resource Planning (“ERP”) system designed to maintain our financial records used to report operating results. We have not experienced any material impact to our internal controls over financial reporting despite the new ERP system and the fact that most of our employees continue to work remotely due to the COVID-19 pandemic. We continue to monitor and assess the impact of the new ERP system and ongoing COVID-19 pandemic on our internal controls to minimize the impact on their design and operating effectiveness.

Enphase Energy, Inc. | 2022 Form 10-Q | 48

PART II. OTHER INFORMATION

Item 1.    Legal Proceedings

From time to time, we may be involved in litigation relating to claims arising out of our operations, the ultimate disposition of which could have a material adverse effect on our operations, financial condition, or cash flows. We are not currently involved in any material legal proceedings, and our management believes there are currently no claims or actions pending against us.

Item 1A.    Risk Factors

The disclosure below supplements our risk factors from those disclosed in Part I, Item 1A in the Form 10‑K. These risks and uncertainties, along with those previously disclosed, could materially adversely affect our business or financial results.

Challenges relating to current supply chain constraints, including with respect to semiconductors and integrated circuits, could adversely impact our revenues, gross margins and results of operations.

Due to increased demand across a range of industries, the global supply market for certain raw materials and components, including, in particular, semiconductor, integrated circuits and other electronic components used in some of our products, has experienced significant constraint and disruption in recent periods. This constrained supply environment has adversely affected, and could further affect, component availability, lead times and cost, and could increase the likelihood of unexpected cancellations or delays of previously committed supply of key components. In an effort to mitigate these risks, we have incurred higher costs to secure available inventory, have extended our purchase commitments and placed non-cancellable, advanced orders with or through suppliers, particularly for long lead time components. Our efforts to expand our manufacturing capacity and multi-source and pre-order components may fail to reduce the impact of these adverse supply chain conditions on our business.

Despite our mitigation efforts, these constrained supply conditions may adversely impact our revenues and results of operations. At the same time, increased costs associated with supply premiums, labor, expediting fees and freight and logistics may adversely impact our gross margin, profitability and ability to reduce the cost to manufacture our products in a manner consistent with prior periods. The COVID-19 pandemic and conflict in Ukraine has also contributed to and exacerbated this strain, and there can be no assurance that the impacts of the pandemic and conflict in Ukraine on our supply chain will not continue, or worsen, in the future. The current supply chain challenges could also result in increased use of cash, engineering design changes and delays in new product introductions, each of which could adversely impact our business and financial results. In the event these supply chain challenges persist for the foreseeable future, these conditions could adversely impact our results of operations.

Item 2.    Unregistered Sales of Equity Securities and Use of Proceeds

Stock Repurchase Program

In May 2021, our board of directors authorized the 2021 Repurchase Program pursuant to which we may repurchase up to an aggregate of $500.0 million of our common stock. As of June 30, 2022, we have approximately $200.0 million remaining for repurchase of shares under the 2021 Repurchase Program. Purchases may be completed from time to time in the open market or through structured repurchase agreements with third parties. The program may be discontinued or amended at any time and expires on May 13, 2024. Such purchases are expected to continue through May 2024 unless otherwise extended or shortened by our board of directors.

Enphase Energy, Inc. | 2022 Form 10-Q | 49

The following table provides information about our purchases of our common stock during the three months ended June 30, 2022 (in thousands, except per share amounts):

Period Ended	Total Number of Shares Purchased	Average Price Paid per Share	Total Number of Shares Purchased as Part of Publicly Announced Programs	Approximate Dollar Value of Shares that May Yet Be Purchased Under the Programs
April 2022	—	—	—	$	200,000
May 2022	—	—	—	$	200,000
June 2022	—	—	—	$	200,000
Total	—		—

Item 3.    Defaults Upon Senior Securities

None.

Item 4.    Mine Safety Disclosures

Not applicable.

Item 5.    Other Information

None.

Enphase Energy, Inc. | 2022 Form 10-Q | 50

Item 6.    Exhibits

A list of exhibits filed with this report or incorporated herein by reference is found in the Exhibit Index below.

			Incorporation by Reference
Exhibit Number	Exhibit Description	Form	SEC File No.	Exhibit	Filing Date	Filed Herewith
3.1	Amended and Restated Certificate of Incorporation of Enphase Energy, Inc.	8-K	001-35480	3.1	4/6/2012
3.2	Certificate of Amendment of the Amended and Restated Certificate of Incorporation of Enphase Energy, Inc.	10-Q	001-35480	3.1	8/9/2017
3.3	Certificate of Amendment of the Amended and Restated Certificate of Incorporation of Enphase Energy, Inc.	10-Q	001-35480	2.1	8/6/2018
3.4	Certificate of Amendment of the Amended and Restated Certificate of Incorporation of Enphase Energy, Inc.	8-K	001-35480	3.1	5/27/2020
3.5	Certificate of Amendment of the Amended and Restated Certificate of Incorporation of Enphase Energy, Inc.	S-8	333-256290	4.5	5/19/2021
3.6	Amended and Restated Bylaws of Enphase Energy, Inc.	8-K	001-35480	3.1	4/8/2022
10.1	Amendment No. 4 to Master Supply Agreement, dated January 4, 2021, by and between Enphase Energy, Inc. and SunPower Corporation.					X
10.2#	Amendment No. 5 to Master Supply Agreement, dated July 6, 2022, by and between Enphase Energy, Inc. and SunPower Corporation.					X
31.1	Certification of Chief Executive Officer pursuant to Rule 13a-14(a)/15d-14(a).					X
31.2	Certification of Chief Financial Officer pursuant to Rule 13a-14(a)/15d-14(a).					X
32.1*	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350 as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.					X
101.INS	XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH	XBRL Taxonomy Extension Schema Document.					X
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document.					X
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document.					X
101.LAB	XBRL Taxonomy Extension Label Linkbase Document.					X
101.PRE	XBRL Taxonomy Extension Presentation Document.					X
104	Cover Page Interactive Data File (formatted in Inline XBRL and contained in Exhibit 101).					X

#    Certain portions of this exhibit have been omitted pursuant to Item 601 of Regulation S-K.

*    The certifications attached as Exhibit 32.1 accompany this Quarterly Report on Form 10-Q pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, and shall not be deemed “filed” by Enphase Energy, Inc. for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.

Enphase Energy, Inc. | 2022 Form 10-Q | 51

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Quarterly Report on Form 10-Q to be signed on its behalf by the undersigned, thereunto duly authorized.

Dated: July 26, 2022

ENPHASE ENERGY, INC.
By:	/s/ Mandy Yang
	Mandy Yang
	Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer)
	(Duly Authorized Officer)

Enphase Energy, Inc. | 2022 Form 10-Q | 52

EX-10.1

Exhibit 10.1

Amendment No. 4 to

Master Supply Agreement

This Amendment No. 4 to Master Supply Agreement, is entered into as of January 4, 2021(“Amendment 4 Effective Date”) by and between SunPower Corporation, a Delaware corporation with offices at 51 Rio Robles, San Jose, California 95134 (“SunPower”), and Enphase Energy, Inc., a Delaware corporation with offices at 47281 Bayside Parkway, Fremont, California 94538 (“Enphase”). Capitalized terms not otherwise defined herein shall have the meaning ascribed to them in the MSA. SunPower and Enphase are each referred to herein as a “Party” and together as the “Parties”.

WHEREAS, the Parties entered into to that certain Master Supply Agreement dated June 12, 2018, as previously amended by Amendment No. 1 dated December 10, 2018, Amendment No. 2 dated October 15, 2020, and Amendment No. 3 dated October 28, 2020, (the “Agreement”); and

WHEREAS, Attachment B to Amendment No. 3 (hereinafter “Attachment B”), contains misstatements relating to SunPower’s purchase of Enphase IQ7PD-84-2-US microinverters; and

WHEREAS, the Parties wishes to amend and restate Attachment B to correct such misstatements.

NOW, THEREFORE, for adequate consideration, the receipt of which is hereby acknowledged, the Parties hereby agree as follows.

1.Amendment.Attachment B is stricken in its entirety and replaced by the Amended and Restated Attachment B, attached hereto and incorporated by reference.

2.Entire Agreement. Except as expressly set forth in this Amendment No. 4, the Agreement (as previously amended) will remain unmodified and in full force and effect.

3.Counterparts. This Amendment may be signed originally or by facsimile or other means of electronic transmission in any number of counterparts with the same effect as if the signatures to each counterpart were upon a single instrument. All counterparts will be deemed an original of this Amendment.

4.Integration. The Agreement, as expressly modified by this Amendment, contains the entire agreement between the parties with respect to the subject matter hereof and supersedes all prior agreements, understandings, offers, and negotiations, oral or written, with respect thereto.

5.Governing Law. This Amendment will be governed by and construed and enforced in accordance with the laws of the State of California without reference to its conflict of laws provisions.

IN WITNESS WHEREOF, the Parties have duly authorized and caused this Amendment to be executed as of the Amendment No. 4 Effective Date.

ENPHASE ENERGY, INC. By:     /s/ Eric Branderiz             Printed Name:    Eric Branderiz         Title:    Chief Financial Officer         Date:    January 12, 2021          SunPower Corporation By:     /s/ Karry Keas             Printed Name:    Karry Keas         Title:    Director of Procurement         Date:    January 12, 2021         

EX-10.2

[*] = Certain confidential information contained in this document, marked by brackets, has been omitted because it is both not material and would likely cause competitive harm to the Company if publicly disclosed.

Exhibit 10.2

Amendment No. 5

to

Master Supply Agreement

This Amendment No. 5 to Master Supply Agreement (the “Amendment”), is entered into as of July 6, 2022 (the “Amendment Effective Date”) by and between SunPower Corporation, a Delaware corporation with offices at 51 Rio Robles, San Jose, California 95134 (“SunPower”), and Enphase Energy, Inc., a Delaware corporation with offices at 47281 Bayside Parkway, Fremont, California 94538 (formerly at 1420 N. McDowell Blvd., Petaluma, CA 94954) (“Enphase”), and amends that certain Master Supply Agreement dated June 12, 2018 (as previously amended, the “MSA”). Capitalized terms not otherwise defined herein shall have the meaning ascribed to them in the MSA.

WHEREAS, SunPower desires to purchase Enphase IQ7HS microinverters with a metal bracket for pairing with third party modules used in SunPower PV systems; and

WHEREAS, Enphase wishes to sell such microinverter products to SunPower solely for use in SunPower systems, all pursuant to the MSA as amended by this Amendment.

NOW, THEREFORE, for adequate consideration, the receipt of which is hereby acknowledged, and notwithstanding any other language in the MSA, the Parties agree to the following:

1.Covered Products. For purposes of this Amendment, “Covered Products” means IQ7HS discrete microinverter with metal bracket. Covered Products does not include any other Products supplied under the terms of the MSA. The applicable data sheet for the Covered Products is attached hereto as Exhibit A-5. Except as specifically set forth in this Amendment, the Covered Products shall be treated as “Products” under the MSA, and Exhibit A to the MSA is hereby amended to add the Covered Products to the list of Products in that Exhibit A.

2.Development; Manufacturing. Following execution of this Amendment, Enphase shall commence development of the Covered Products and will use commercially reasonable efforts to commence manufacture and supply of the Covered Products for delivery from Enphase’s (i) [*] manufacturing facility on or before [*]; and (ii) its [*] facility on or before [*].

3.Purchase & Sale Commitments.SunPower shall purchase, and Enphase shall supply, the minimum annual commitment of Covered Products set forth in Exhibit B-5, attached hereto and incorporated by reference (the “Minimum Purchase Commitment”). For the avoidance of doubt, this Exhibit B-5 shall apply solely to the Covered Products made available under this Amendment and, except as expressly set forth herein, shall in no way modify any pricing exhibits previously agreed upon in previous amendments to the MSA with respect to non-Covered Products. Further, purchases of Covered Products hereunder will apply towards: (i) the Total Purchase Commitment, (ii) Minimum Annual Commitment set forth in Sections 2.3 (Purchase and Sale Commitment) of the MSA, or (iii) the Volume Based Adjustment set forth in Exhibit B to the MSA. If SunPower fails to purchase the Minimum Purchase Commitment of Covered Products as set forth herein in 2022, then on or before February 1 of 2023, SunPower shall pay Enphase an amount equal to [*] for each Covered Product in the resulting shortfall.

4.Delivery Lead Time. Delivery Lead Time for the Covered Product is [*] weeks.

5.Pricing. The price for the Covered Product is set forth in Exhibit B-5 (the “Base Price”).

6.Term; Termination. This Amendment commences on the Amendment Effective Date and shall continue through the Initial Term and any Renewal Terms of the MSA. If the Agreement is terminated for any reason other than an Event of Default by Enphase, and SunPower has failed to purchase the total purchase commitment set forth in Exhibit B-5, then within 45 days of the effective date of termination SunPower shall pay Enphase [*] for each Covered Product in the resulting shortfall.

7.Module Pairing; System Installations. SunPower is permitted to pair the Covered Products with any module that meets Enphase’s published specifications for compatibility with the Covered Products (“Compatible Modules”). No additional qualification of individual modules shall be required in order for SunPower to use the Covered Products with a Compatible Module. If a Covered Product or Compatible Module is installed in a solar energy system, all of the other microinverters installed in such system must be IQ7HS microinverters and all the other modules installed in such system must utilize IQ7HS microinverters.

[*] = Certain confidential information contained in this document, marked by brackets, has been omitted because it is both not material and would likely cause competitive harm to the Company if publicly disclosed.

Exhibit 10.2

8.Resale. SunPower shall use the Covered Products solely paired with (i) new third-party modules for use in SunPower system installations and for no other purpose; or (ii) as a replacement for another Covered Product or an IQ7HS ACM unit. In no event will SunPower resell the Covered Products as stand-alone items or pair the Covered Products with modules previously paired with a non-Covered Product or non-IQ7HS ACM units.

9.Installation Requirements. SunPower shall ensure that all installations of the Covered Products comply with the Quick Install Guide and the Enphase Documentation for the Covered Products, which are attached hereto as Exhibit C-5.

10.Shipping & Delivery.Covered Products will be delivered F.C.A. (Incoterms 2010) Enphase’s plant or shipping point designated by Enphase, at which point the following will pass from Enphase to SunPower: (i) title to the Covered Products (other than the Embedded Software) and (ii) risk of loss. Section 3.3 (Extraordinary Transportation for Late Deliveries) of the MSA shall not apply to the Covered Products.

11.Data Sharing. The data sharing provisions set forth in Section 5.d and Attachment D-1 of Amendment No. 3 to the MSA (dated October 1, 2019) are hereby amended as follows:

i.[*]

ii.[*]

1.[*]

2.[*]

3.[*]

iii.[*]

12.Full Force and Effect. Except as expressly set forth herein, the terms and provisions of the MSA remain in full force and effect. Nothing contained in this Amendment shall in any way impair the validity or enforceability of the MSA, as modified hereby, or alter, waive, annul, vary, affect, or impair any provisions, conditions, or covenants contained therein or any rights, powers, or remedies granted therein, except as otherwise specifically provided in this Amendment.

13.Counterparts. This Amendment may be signed originally or by facsimile or other means of electronic transmission in any number of counterparts, and by different parties hereto in separate counterparts, with the same effect as if the signatures to each such counterpart were upon a single instrument. All counterparts shall be deemed an original of this Amendment.

14.Integration. This Amendment and any documents executed in connection herewith or pursuant hereto contain the entire agreement between the parties with respect to the subject matter hereof and supersede all prior agreements, understandings, offers and negotiations, oral or written, with respect thereto and no extrinsic evidence whatsoever may be introduced in any judicial or arbitration proceeding, if any, involving this Amendment.

15.Governing Law. This Amendment shall be governed by and construed in accordance with the laws of the State of California, without regard to any conflicts of laws principles.

[Remainder of page intentionally left blank; signatures follow.]

[*] = Certain confidential information contained in this document, marked by brackets, has been omitted because it is both not material and would likely cause competitive harm to the Company if publicly disclosed.

Exhibit 10.2

IN WITNESS WHEREOF, the parties have duly authorized and caused this Amendment to be executed as of the Date written below. This Amendment may be signed in counterparts, with the same effect as if each were upon a single instrument.

ENPHASE ENERGY, INC. By:     /s/ Mandy Yang             Name:    Mandy Yang             Title:    Chief Financial Officer         Date:    7/6/2022                 SUNPOWER CORPORATION By:     /s/ Jeff Cyan             Name:    Jeff Cyan             Title:    VP Supply Chain             Date:    7/8/2022                

Attachments:

Exhibit A-5 – Enphase IQ™7HS Data Sheet

Exhibit B-5 – Covered Product Volumes, Pricing

Exhibit C-5 – Quick Install Guide and Enphase Documentation for the Covered Products

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Badrinarayanan Kothandaraman, certify that:

1.I have reviewed this Form 10-Q of Enphase Energy, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15(d)-15(f)) for the registrant and have:

a.designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: July 26, 2022

/s/ BADRINARAYANAN KOTHANDARAMAN

Badrinarayanan Kothandaraman

President and Chief Executive Officer
(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Mandy Yang, certify that:

1.I have reviewed this Form 10-Q of Enphase Energy, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15(d)-15(f)) for the registrant and have:

a.designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: July 26, 2022

/s/ MANDY YANG

Mandy Yang

Chief Financial Officer
(Principal Financial Officer and Principal Accounting Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION

Pursuant to the requirement set forth in Rule 13a-14(b) of the Securities Exchange Act of 1934, as amended, (the “Exchange Act”) and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. §1350), Badrinarayanan Kothandaraman, President and Chief Executive Officer of Enphase Energy, Inc. (the “Company”), and Mandy Yang, Chief Financial Officer Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer) of the Company, each hereby certifies that, to the best of his or her knowledge:

1. The Company’s Quarterly Report on Form 10-Q for the period ended June 30, 2022, to which this Certification is attached as Exhibit 32.1 (the “Periodic Report”), fully complies with the requirements of Section 13(a) or Section 15(d) of the Exchange Act; and

2. The information contained in the Periodic Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: July 26, 2022	Date: July 26, 2022
/s/ BADRINARAYANAN KOTHANDARAMAN	/s/ MANDY YANG
Badrinarayanan Kothandaraman	Mandy Yang
President and Chief Executive Officer (Principal Executive Officer)	Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer)

This certification accompanies the Form 10-Q to which it relates, is not deemed filed with the Securities and Exchange Commission and is not to be incorporated by reference into any filing of Enphase Energy, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended (whether made before or after the date of the Form 10-Q), irrespective of any general incorporation language contained in such filing.

A signed original of this written statement has been provided to Enphase Energy, Inc. and will be retained by it and furnished to the Securities and Exchange Commission or its staff upon request.

XML

COVER PAGE - shares	6 Months Ended
	Jun. 30, 2022	Jul. 21, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
Document Transition Report	false
Entity File Number	001-35480
Entity Registrant Name	Enphase Energy, Inc.
Entity Incorporation, State	DE
Entity Tax Identification Number	20-4645388
Entity Address, Address Line One	47281 Bayside Parkway
Entity Address, City or Town	Fremont
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94538
City Area Code	877
Local Phone Number	774-7000
Title of 12(b) Security	Common Stock, $0.00001 par value per share
Trading Symbol	ENPH
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		135,457,275
Entity Central Index Key	0001463101
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31

XML

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 495,473	$ 119,316
Marketable securities	752,328	897,335
Accounts receivable, net of allowances of $740 and $1,590 at June 30, 2022 and December 31, 2021, respectively	312,451	333,626
Inventory	130,266	74,400
Prepaid expenses and other assets	45,474	37,784
Total current assets	1,735,992	1,462,461
Property and equipment, net	86,778	82,167
Operating lease, right of use asset, net	16,987	14,420
Intangible assets, net	96,887	97,758
Goodwill	197,004	181,254
Other assets	129,153	118,726
Deferred tax assets, net	174,307	122,470
Total assets	2,437,108	2,079,256
Current liabilities:
Accounts payable	90,398	113,767
Accrued liabilities	197,919	157,912
Deferred revenues, current	74,067	62,670
Warranty obligations, current (includes $24,772 and $14,612 measured at fair value at June 30, 2022 and December 31, 2021, respectively)	29,197	19,395
Debt, current	88,429	86,052
Total current liabilities	480,010	439,796
Long-term liabilities:
Deferred revenues, non-current	217,095	187,186
Warranty obligations, non-current (includes $49,151 and $36,395 measured at fair value at June 30, 2022 and December 31, 2021, respectively)	67,354	53,982
Other liabilities	23,864	16,530
Debt, non-current	1,197,786	951,594
Total liabilities	1,986,109	1,649,088
Commitments and contingencies (Note 10)
Stockholders’ equity:
Common stock, $0.00001 par value, 300,000 shares authorized; and 135,426 shares and 133,894 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	1	1
Additional paid-in capital	713,473	837,924
Accumulated deficit	(251,230)	(405,737)
Accumulated other comprehensive loss	(11,245)	(2,020)
Total stockholders’ equity	450,999	430,168
Total liabilities and stockholders’ equity	$ 2,437,108	$ 2,079,256
Common stock, shares authorized (in shares)	300,000,000	300,000,000

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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Accounts receivable, allowance	$ 740	$ 1,590
Product warranty, measured at fair value, current	24,772	14,612
Product warranty, measured at fair value, noncurrent	$ 49,151	$ 36,395
Common stock, par value (in usd per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	135,426,000	133,894,000
Common stock, shares outstanding (in shares)	135,426,000	133,894,000

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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Net revenues	$ 530,196	$ 316,057	$ 971,488	$ 617,811
Cost of revenues	311,191	188,256	575,510	367,061
Gross profit	219,005	127,801	395,978	250,750
Operating expenses:
Research and development	39,256	22,708	74,975	44,526
Sales and marketing	53,588	25,586	94,932	45,208
General and administrative	32,125	20,107	70,211	40,230
Total operating expenses	124,969	68,401	240,118	129,964
Income from operations	94,036	59,400	155,860	120,786
Other income (expense), net
Interest income	796	98	1,256	171
Interest expense	(2,168)	(12,506)	(4,904)	(19,835)
Other expense, net	(456)	(633)	(2,597)	(60)
Loss on partial settlement of convertible notes	0	(13)	0	(56,382)
Total other expense, net	(1,828)	(13,054)	(6,245)	(76,106)
Income before income taxes	92,208	46,346	149,615	44,680
Income tax (provision) benefit	(15,232)	(6,995)	(20,818)	26,369
Net income	$ 76,976	$ 39,351	$ 128,797	$ 71,049
Net income per share:
Basic (in USD per share)	$ 0.57	$ 0.29	$ 0.96	$ 0.53
Diluted (in USD per share)	$ 0.54	$ 0.28	$ 0.91	$ 0.49
Shares used in per share calculation:
Basic (in shares)	135,196	135,094	134,768	133,209
Diluted (in shares)	143,725	141,533	143,602	144,022

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 76,976	$ 39,351	$ 128,797	$ 71,049
Other comprehensive income (loss):
Foreign currency translation adjustments	(2,570)	1,284	(2,306)	1,490
Marketable securities
Change in net unrealized loss	(1,351)	0	(6,919)	0
Less: reclassification adjustment for net losses included in net income	0	0	0	0
Net change, net of income tax benefit of $475 and $2,431 for the three and six months ended June 30, 2022, respectively	(1,351)	0	(6,919)	0
Comprehensive income	$ 73,055	$ 40,635	$ 119,572	$ 72,539

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Marketable Securities, income tax benefit	$ 475	$ 2,431

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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common stock and paid-in capital	Common stock and paid-in capital Cumulative Effect, Period of Adoption, Adjustment	Accumulated deficit	Accumulated deficit Cumulative Effect, Period of Adoption, Adjustment	Accumulated other comprehensive income (loss)
Balance, beginning of period at Dec. 31, 2020		$ 534,745		$ (51,186)		$ 434
Issuance of common stock from exercise of equity awards and employee stock purchase plan		3,642
Payment of withholding taxes related to net share settlement of equity awards		(16,998)
Equity component of convertible senior notes, net		207,970
Cost of convertible notes hedge related to the convertible senior notes, net		(213,322)
Sale of warrants related to the convertible senior notes		220,800
Equity component of settlement of convertible senior notes, net		(966,557)
Settlement of convertible senior notes		962,176
Stock-based compensation		30,156
Net income	$ 71,049			71,049
Repurchase of common stock				(200,000)
Foreign currency translation adjustments	1,490					1,490
Change in net unrealized loss on marketable securities, net of tax	0
Balance, end of period at Jun. 30, 2021	$ 584,399	762,612		(180,137)		1,924
Balance, beginning of period at Dec. 31, 2020		534,745		(51,186)		434
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2020-06
Balance, end of period at Dec. 31, 2021	$ 430,168	837,925	$ (207,967)	(405,737)	$ 25,710	(2,020)
Balance, beginning of period at Mar. 31, 2021		751,689		(19,488)		640
Issuance of common stock from exercise of equity awards and employee stock purchase plan		3,428
Payment of withholding taxes related to net share settlement of equity awards		(7,813)
Equity component of convertible senior notes, net		8
Equity component of settlement of convertible senior notes, net		(74)
Settlement of convertible senior notes		62
Stock-based compensation		15,312
Net income	39,351			39,351
Repurchase of common stock				(200,000)
Foreign currency translation adjustments	1,284					1,284
Change in net unrealized loss on marketable securities, net of tax	0
Balance, end of period at Jun. 30, 2021	584,399	762,612		(180,137)		1,924
Balance, beginning of period at Dec. 31, 2021	430,168	837,925	$ (207,967)	(405,737)	$ 25,710	(2,020)
Issuance of common stock from exercise of equity awards and employee stock purchase plan		4,587
Payment of withholding taxes related to net share settlement of equity awards		(14,807)
Stock-based compensation		93,736
Net income	128,797			128,797
Foreign currency translation adjustments	(2,306)					(2,306)
Change in net unrealized loss on marketable securities, net of tax	(6,919)					(6,919)
Balance, end of period at Jun. 30, 2022	450,999	713,474		(251,230)		(11,245)
Balance, beginning of period at Mar. 31, 2022		666,512		(328,206)		(7,324)
Issuance of common stock from exercise of equity awards and employee stock purchase plan		4,183
Payment of withholding taxes related to net share settlement of equity awards		(5,463)
Stock-based compensation		48,242
Net income	76,976			76,976
Foreign currency translation adjustments	(2,570)					(2,570)
Change in net unrealized loss on marketable securities, net of tax	(1,351)					(1,351)
Balance, end of period at Jun. 30, 2022	$ 450,999	$ 713,474		$ (251,230)		$ (11,245)

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income	$ 128,797	$ 71,049
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	30,805	13,154
Provision for doubtful accounts	131	271
Asset impairments	1,200	0
Non-cash interest expense	4,025	19,463
Loss on partial settlement of convertibles notes	0	56,382
Deemed repayment of convertible notes attributable to accreted debt discount	0	(15,585)
Change in fair value of debt securities	129	(2,369)
Stock-based compensation	100,861	30,156
Deferred income taxes	15,617	(30,127)
Changes in operating assets and liabilities:
Accounts receivable	27,546	(98,531)
Inventory	(55,866)	4,008
Prepaid expenses and other assets	(21,352)	(15,194)
Accounts payable, accrued and other liabilities	10,228	46,890
Warranty obligations	22,878	14,025
Deferred revenues	38,094	47,909
Net cash provided by operating activities	303,093	141,501
Cash flows from investing activities:
Purchases of property and equipment	(21,066)	(26,368)
Investments in private companies	0	(45,000)
Business acquisitions, net of cash acquired	(27,680)	(55,239)
Purchases of marketable securities	(60,061)	0
Maturities of marketable securities	193,033	0
Net cash provided by (used in) investing activities	84,226	(126,607)
Cash flows from financing activities:
Issuance of convertible notes, net of issuance costs	0	1,188,439
Purchase of convertible note hedges	0	(286,235)
Sale of warrants	0	220,800
Principal payments and financing fees on debt	0	(1,422)
Partial repurchase of convertible notes	0	(289,312)
Proceeds from exercise of equity awards and employee stock purchase plan	4,587	3,642
Repurchase of common stock	0	(200,000)
Payment of withholding taxes related to net share settlement of equity awards	(14,807)	(16,998)
Net cash provided by (used in) financing activities	(10,220)	618,914
Effect of exchange rate changes on cash and cash equivalents	(942)	(926)
Net increase in cash and cash equivalents	376,157	632,882
Cash and cash equivalents—Beginning of period	119,316	679,379
Cash and cash equivalents—End of period	495,473	1,312,261
Supplemental disclosures of non-cash investing and financing activities:
Purchases of property and equipment included in accounts payable	2,783	4,175
Purchase Of Property and Equipment Through Tenant Improvement Allowance	748	0
Contingent consideration in connection with the acquisition	$ 0	$ 3,596

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DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

6 Months Ended

Jun. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

Description of Business

Enphase Energy, Inc. (the “Company”) is a global energy technology company. The Company delivers smart, easy-to-use solutions that manage solar generation, storage and communication on one platform. The Company revolutionized the solar industry with its microinverter technology and produces a fully integrated solar-plus-storage solution.

Basis of Presentation and Consolidation

The accompanying condensed consolidated financial statements are presented in accordance with accounting principles generally accepted in the United States (“GAAP”). The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.

Unaudited Interim Financial Information

These accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) for interim financial reporting. In the opinion of management, these unaudited condensed consolidated financial statements reflect all adjustments, consisting of normal recurring items, considered necessary to present fairly the Company’s financial condition, results of operations, comprehensive income, stockholders’ equity and cash flows for the interim periods indicated. The results of operations for the three and six months ended June 30, 2022 are not necessarily indicative of the operating results for the full year.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Significant estimates and assumptions reflected in the financial statements include revenue recognition, allowance for doubtful accounts, stock-based compensation, deferred compensation arrangements, inventory valuation, accrued warranty obligations, fair value of investments, debt derivatives, convertible notes and contingent consideration, fair value of acquired intangible assets and goodwill, useful lives of acquired intangible assets and property and equipment, incremental borrowing rate for right-of-use assets and lease liability. These estimates are based on information available as of the date of the financial statements; therefore, actual results could differ materially from those estimates due to risks and uncertainties, including uncertainty in the ongoing semiconductor supply and logistics constraints, and the continuing COVID-19 pandemic.

The year-end condensed consolidated balance sheet data was derived from audited financial statements but does not include all disclosures required by accounting principles generally accepted in the United States. The Company filed audited consolidated financial statements, which included all information and notes necessary for such a complete presentation in conjunction with its Annual Report on Form 10-K for the fiscal year ended December 31, 2021 filed with the SEC on February 11, 2022 (the “Form 10‑K”).

Summary of Significant Accounting Policies

There have been no changes to the Company’s significant accounting policies as described in Note 2, “Summary of Significant Accounting Policies” of the notes to consolidated financial statements included in Part II, Item 8 of the Form 10-K, other than as a result of the Company’s adoption of the new accounting guidance related to convertible senior notes, effective January 1, 2022, as discussed in “Recently Adopted Accounting Pronouncements” below.

Recently Adopted Accounting Pronouncements

In August 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-06, “Debt - Debt with Conversion and Other Options (subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (subtopic 815-40)” (“ASU 2020-06”), which reduces the number of accounting models in subtopic ASC 470-20 that require separate accounting for embedded conversion features. As a result, a convertible debt instrument will be accounted for as a single liability measured at its amortized cost as long as no other features require bifurcation and recognition as derivatives. By removing those separation models, the effective interest rate of convertible debt instruments will be closer to the coupon interest rate. Further, the diluted net income per share calculation for convertible instruments will require the Company to use the if-converted method. The treasury stock method should no longer be used to calculate diluted net income per share for convertible instruments.

The Company adopted ASU 2020-06 in the annual period beginning January 1, 2022, on a modified retrospective basis. Upon adoption of ASU 2020-06, the Company is no longer required to bifurcate the conversion feature related to the issuance of $575.0 million aggregate principal amount of its 0.0% convertible senior notes due 2028 (the “Notes due 2028”) and $632.5 million aggregate principal amount of its 0.0% convertible senior notes due 2026 (the “Notes due 2026”) in equity. Instead, the Company combined the previously separated equity component with the liability component, which together is now classified as debt, thereby eliminating the subsequent amortization of the debt discount. Similarly, the portion of issuance costs previously allocated to equity was reclassified to the carrying value of debt and amortized over the remaining terms of the convertible senior notes. Accordingly, the Company recorded a net decrease to additional paid-in capital by $207.9 million, net of tax to remove the equity component separately recorded for the conversion features associated with the convertible senior notes and equity component associated with the issuance costs, an increase to the carrying value of its convertible debt instrument by $244.5 million to reflect the full principal amount of the convertible senior notes outstanding net of issuance costs, a decrease to deferred tax liability of $62.3 million, and a decrease to accumulated deficit by $25.7 million, net of tax in the Company’s consolidated balance sheet with no impact on the Company’s consolidated statements of operations.

Also upon adoption of ASU 2020-06, the Company is no longer utilizing the treasury stock method for earnings per share impact for 0.25% convertible senior notes due 2025 (the “Notes due 2025”), the Notes due 2026 and the Notes due 2028 (together, the “Convertible Senior Notes”). Instead, the Company is applying the if-converted method when reporting the number of potentially dilutive shares of common stock as the Company may at its election, settle its Convertible Senior Notes through payment or delivery, as the case may be, in cash, shares of its common stock or a combination of cash and shares of its common stock. Further, the Company under the relevant sections of the indentures, irrevocably may elect to settle principal in cash and any excess in cash or shares of the Company’s common stock for its Convertible Senior Notes. If and when the Company makes such election, there will be no adjustment to the net income and the Company will use the average share price for the period to determine the potential number of shares to be issued based upon assumed conversion to be included in the diluted share count.

Recently Issued Accounting Pronouncements

Not Yet Effective

In October 2021, the FASB issued ASU 2021-08, "Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers" (“ASU 2021-08”). ASU 2021-08 requires an acquirer in a business combination to recognize and measure contract assets and contract liabilities acquired in a business combination in accordance with ASC 606, “Revenue from Contracts with Customers,” as if it had originated the contracts. ASU 2021-08 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022. Early adoption is permitted. The Company does not expect the adoption of ASU 2021-08 to have a significant impact on its condensed consolidated financial statements and plans to adopt the standard effective January 1, 2023.

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REVENUE RECOGNITION

6 Months Ended

Jun. 30, 2022

Revenue from Contract with Customer [Abstract]

REVENUE RECOGNITION

REVENUE RECOGNITION

Disaggregated Revenue

The Company has one major business activity, which is the design, manufacture and sale of solutions for the solar photovoltaic (“PV”) industry. Disaggregated revenue by primary geographical market and timing of revenue recognition for the Company’s single product line are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Primary geographical markets:
U.S.	$	422,628	$	254,576	$	792,120	$	502,358
International	107,568		61,481		179,368		115,453
Total	$	530,196	$	316,057	$	971,488	$	617,811
Timing of revenue recognition:
Products delivered at a point in time	$	511,865	$	302,100	$	936,014	$	590,971
Products and services delivered over time	18,331		13,957		35,474		26,840
Total	$	530,196	$	316,057	$	971,488	$	617,811

Contract Balances

Receivables, and contract assets and contract liabilities from contracts with customers, are as follows:

	June 30, 2022		December 31, 2021
	(In thousands)
Receivables	$	312,451	$	333,626
Short-term contract assets (Prepaid expenses and other assets)	26,537		23,508
Long-term contract assets (Other assets)	78,139		69,583
Short-term contract liabilities (Deferred revenues, current)	74,067		62,670
Long-term contract liabilities (Deferred revenues, non-current)	217,095		187,186

The Company receives payments from customers based upon contractual billing schedules. Accounts receivable are recorded when the right to consideration becomes unconditional. Contract assets include deferred product costs and commissions associated with the deferred revenue and will be amortized along with the associated revenue. The Company had no asset impairment charges related to contract assets in the six months ended June 30, 2022.

Significant changes in the balances of contract assets (prepaid expenses and other assets) as of June 30, 2022 are as follows (in thousands):

Contract Assets
Contract Assets, beginning of period	$	93,091
Amount recognized	(13,156)
Increase	24,741
Contract Assets, end of period	$	104,676

Contract liabilities are recorded as deferred revenue on the accompanying condensed consolidated balance sheets and include payments received in advance of performance obligations under the contract and are realized when the associated revenue is recognized under the contract.

Significant changes in the balances of contract liabilities (deferred revenues) as of June 30, 2022 are as follows (in thousands):

Contract Liabilities
Contract Liabilities, beginning of period	$	249,856
Revenue recognized	(35,474)
Increase due to billings	76,780
Contract Liabilities, end of period	$	291,162

Remaining Performance Obligations

Estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially unsatisfied at the end of the reporting period are as follows:

	June 30, 2022
	(In thousands)
Fiscal year:
2022 (remaining six months)	$	38,983
2023	68,667
2024	62,924
2025	55,770
2026	40,141
Thereafter	24,677
Total	$	291,162

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OTHER FINANCIAL INFORMATION

6 Months Ended

Jun. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

OTHER FINANCIAL INFORMATION

OTHER FINANCIAL INFORMATIONInventory

Inventory consists of the following:

	June 30, 2022		December 31, 2021
	(In thousands)
Raw materials	$	25,559	$	25,429
Finished goods	104,707		48,971
Total inventory	$	130,266	$	74,400

Accrued Liabilities

Accrued liabilities consist of the following:

	June 30, 2022		December 31, 2021
	(In thousands)
Salaries, commissions, incentive compensation and benefits	$	14,670	$	13,062
Customer rebates and sales incentives	116,647		79,038
Freight	17,788		20,522
Operating lease liabilities, current	3,804		3,830
Liability due to supply agreements	12,278		14,653
Contingent consideration	—		3,710
Post combination expense accrual	7,585		8,602
VAT payable	10,952		7,231
Other	14,195		7,264
Total accrued liabilities	$	197,919	$	157,912

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BUSINESS COMBINATIONS

6 Months Ended

Jun. 30, 2022

Business Combination and Asset Acquisition [Abstract]

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS

Acquisition of SolarLeadFactory, LLC. (“SolarLeadFactory”)

On March 14, 2022, the Company completed the acquisition of 100% of the shares of SolarLeadFactory, a privately-held company. SolarLeadFactory provides high quality leads to solar installers. As part of the purchase price, the Company paid approximately $26.1 million in cash on March 14, 2022.

The acquisition has been accounted for as a business combination under the acquisition method, and accordingly, the total purchase price is allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their respective fair values on the acquisition date.

In addition to the purchase price summarized above, the Company will be obligated to issue up to approximately $10.0 million in shares of common stock of the Company payable in the second quarter of 2023, subject to achievement of certain operational targets. As the additional payments require continuous employment of certain key employees of SolarLeadFactory and are subject to other conditions, these payments are being accounted for as post-combination expense and will be recognized ratably over the one-year period presuming conditions will be met.

The following table summarizes the preliminary estimated fair values of the assets acquired and liabilities assumed at the acquisition date, which are subject to change within the measurement period as the fair value assessments are finalized (in thousands):

Cash and cash equivalents	$	1,426
Net tangible assets acquired	813
Intangible assets	11,200
Goodwill	12,612
Net assets acquired	$	26,051

The excess of the consideration paid over the fair values assigned to the assets acquired and liabilities assumed represents the goodwill resulting from the acquisition. Goodwill is primarily attributable to expected synergies in the Company’s solar offerings and cross-selling opportunities. The entire goodwill amount is expected to be deductible for U.S. federal income tax purposes over 15 years.

Intangible assets consist primarily of developed technology and customer relationships. Developed technology intangible attributable to developed technology includes a combination of unpatented technology, trade secrets, computer software and research processes that represent the foundation for the existing and planned new products to facilitate the generation of new content. Customer relationships intangible relates to SolarLeadFactory’s ability to sell current and future offerings, as well as products built around the current offering, to its existing customers.

The following table shows the fair value of the separately identifiable intangible assets at the time of acquisition and the period over which each intangible asset will be amortized:

	Preliminary Fair Value		Useful Life
	(In thousands)		(Years)
Developed technology	$	3,600	5
Customer relationships	7,600		5
Total identifiable intangible assets	$	11,200

Pro forma financial information has not been presented for the SolarLeadFactory acquisition as the impact to the Company’s condensed consolidated financial statements was not material.

The Company incurred and accrued costs related to acquisition of $0.4 million that were recorded in general and administrative expenses in the accompanying condensed consolidated statements of operations for the six months ended June 30, 2022

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GOODWILL AND INTANGIBLE ASSETS

6 Months Ended

Jun. 30, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS

The Company’s goodwill as of June 30, 2022 and December 31, 2021 are as follows:

Goodwill	June 30, 2022		December 31, 2021
	(In thousands)
Goodwill, beginning of period	$	181,254	$	24,783
Goodwill acquired	16,378		156,390
Currency translation adjustment	(628)		81
Goodwill, end of period	$	197,004	$	181,254

The Company’s purchased intangible assets as of June 30, 2022 and December 31, 2021 are as follows:

	June 30, 2022								December 31, 2021
	Gross		Additions		Accumulated Amortization		Net		Gross		Additions		Accumulated Amortization		Net
	(In thousands)
Intangible assets:
Other indefinite-lived intangibles	$	286	$	—	$	—	$	286	$	286	$	—	$	—	$	286
Intangible assets with finite lives:
Developed technology	38,650		3,600		(12,834)		29,416		13,100		25,550		(8,958)		29,692
Customer relationships	41,021		7,600		(15,273)		33,348		26,421		14,600		(11,448)		29,573
Trade names	37,700		—		(3,863)		33,837		—		37,700		(93)		37,607
Order backlog	600		—		(600)		—		—		600		—		600
Total purchased intangible assets	$	118,257	$	11,200	$	(32,570)	$	96,887	$	39,807	$	78,450	$	(20,499)	$	97,758

Amortization expense related to finite-lived intangible assets are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Developed technology	$	2,010	$	891	$	3,876	$	1,690
Customer relationships	2,067		1,532		3,825		2,462
Trade names	1,885		85		3,770		147
Order backlog	323		—		600		—
Total amortization expense	$	6,285	$	2,508	$	12,071	$	4,299

Amortization of developed technology is recorded to cost of sales and customer relationships and trade names is recorded to sales and marketing expense.

The expected future amortization expense of intangible assets as of June 30, 2022 is presented below (in thousands):

	June 30, 2022
Fiscal year:
2022 (remaining six months)	$	11,926
2023	24,096
2024	21,299
2025	19,984
2026	16,425
Thereafter	2,871
Total	$	96,601

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CASH EQUIVALENTS AND MARKETABLE SECURITIES

6 Months Ended

Jun. 30, 2022

Cash and Cash Equivalents [Abstract]

CASH EQUIVALENTS AND MARKETABLE SECURITIES

CASH EQUIVALENTS AND MARKETABLE SECURITIES

The cash equivalents and marketable securities consist of the following:

	As of June 30, 2022
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Cash Equivalents		Marketable Securities
	(In thousands)
Money market funds	$	432,946	$	—	$	—	$	432,946	$	432,946	$	—
Certificates of Deposit	3,126		—		(24)		3,102		—		3,102
Commercial paper	121,294		—		(224)		121,070		—		121,070
Corporate notes and bonds	144,438		1		(3,189)		141,250		—		141,250
U.S. Treasuries	39,551		1		(8)		39,544		—		39,544
U.S. Government agency securities	456,128		—		(8,766)		447,362		—		447,362
Total	$	1,197,483	$	2	$	(12,211)	$	1,185,274	$	432,946	$	752,328

	As of December 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Cash Equivalents		Marketable Securities
	(In thousands)
Money market funds	$	35,789	$	—	$	—	$	35,789	$	35,789	$	—
Certificates of Deposit	16,001		—		(2)		15,999		6,000		9,999
Commercial paper	215,964		—		(114)		215,850		26,997		188,853
Corporate notes and bonds	199,244		—		(872)		198,372		760		197,612
U.S. Treasuries	14,999		—		(1)		14,998		—		14,998
U.S. Government agency securities	487,743		—		(1,870)		485,873		—		485,873
Total	$	969,740	$	—	$	(2,859)	$	966,881	$	69,546	$	897,335

The following table summarizes the contractual maturities of the Company’s cash equivalents and marketable securities as of June 30, 2022:

	Amortized Cost		Fair Value
	(In thousands)
Due within one year	$	1,023,275	$	1,017,129
Due within one to three years	174,208		168,145
Total	$	1,197,483	$	1,185,274

All available-for-sale securities have been classified as current, based on management's intent and ability to use the funds in current operations.

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WARRANTY OBLIGATIONS

6 Months Ended

Jun. 30, 2022

Product Warranties Disclosures [Abstract]

WARRANTY OBLIGATIONS

WARRANTY OBLIGATIONS

The Company’s warranty activities were as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Warranty obligations, beginning of period	$	83,579	$	54,553	$	73,377	$	45,913
Accruals for warranties issued during period	11,311		3,319		20,221		7,213
Changes in estimates	17,063		4,269		21,975		11,924
Settlements	(6,590)		(2,757)		(12,471)		(5,687)
Increase due to accretion expense	1,828		1,104		3,343		2,047
Other	(10,641)		(550)		(9,895)		(1,472)
Warranty obligations, end of period	96,551		59,938		96,551		59,938
Less: current portion	(29,197)		(15,009)		(29,197)		(15,009)
Non-current	$	67,354	$	44,929	$	67,354	$	44,929

Changes in Estimates

In the three months ended June 30, 2022, the Company recorded $17.1 million in warranty expense from change in estimates, of which $13.3 million relates to continuing analysis of field performance data and diagnostic root-cause failure analysis primarily for Enphase IQ™ Battery storage systems and $3.8 million is due to an increase in labor reimbursement rates. In the three months ended June 30, 2021, the Company recorded $4.3 million in warranty expense from change in estimates, of which $2.9 million relates to the timing of cost reduction assumptions for replacement products and $1.4 million relates to continuing analysis of field performance data and diagnostic root-cause failure analysis primarily for its prior generation products.

In the six months ended June 30, 2022, the Company recorded $22.0 million in warranty expense from change in estimates, of which $13.3 million relates to continuing analysis of field performance data and diagnostic root-cause failure analysis primarily for Enphase IQ™ Battery storage systems, $4.9 million is related to an increase in expedited freight costs and replacement costs and $3.8 million is due to an increase in labor reimbursement rates. In the six months ended June 30, 2021, the Company recorded $11.9 million in warranty expense from change in estimates, of which $7.7 million relates to continuing analysis of field performance data and diagnostic root-cause failure analysis primarily for its prior generation products, $2.9 million relates to the timing of cost reduction assumptions for replacement products and $1.3 million relates to the other cost assumption changes.

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FAIR VALUE MEASUREMENTS

6 Months Ended

Jun. 30, 2022

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS

The accounting guidance defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities recorded at fair value, the Company considers the principal or most advantageous market in which it would transact and considers assumptions that market participants would use when pricing the asset or liability, such as inherent risk, transfer restrictions, and risk of nonperformance.

The fair value hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. An asset’s or liability’s categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Three levels of inputs may be used to measure fair value:

•Level 1 - Valuations based on quoted prices in active markets for identical assets or liabilities that the Company is able to access. Since valuations are based on quoted prices that are readily and regularly available in an active market, valuation of such assets or liabilities do not entail a significant degree of judgment.

•Level 2 - Valuations based on one or more quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly.

•Level 3 - Valuations based on inputs that are unobservable and significant to the overall fair value measurement.

The following table presents assets and liabilities measured at fair value on a recurring basis using the above input categories:

	June 30, 2022						December 31, 2021
	(In thousands)
	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents:
Money market funds	$	432,946	$	—	$	—	$	35,789	$	—	$	—
Certificates of deposit	—		—		—		—		6,000		—
Commercial paper	—		—		—		—		26,997		—
Corporate notes and bonds	—		—		—		—		760		—
Marketable securities:
Certificates of deposit	—		3,102		—		—		9,999		—
Commercial paper	—		121,070		—		—		188,853		—
Corporate notes and bonds	—		141,250		—		—		197,612		—
U.S. Government agencies	—		447,362		—		—		485,873		—
U.S. Treasuries	—		39,544		—		—		14,998		—
Other assets
Investments in debt securities	—		—		40,913		—		—		41,042
Total assets measured at fair value	$	432,946	$	752,328	$	40,913	$	35,789	$	931,092	$	41,042
Liabilities:
Accrued liabilities
Contingent consideration	$	—	$	—	$	—	$	—	$	—	$	3,710
Warranty obligations
Current	—		—		24,772		—		—		14,612
Non-current	—		—		49,151		—		—		36,395
Total warranty obligations measured at fair value	—		—		73,923		—		—		51,007
Total liabilities measured at fair value	$	—	$	—	$	73,923	$	—	$	—	$	54,717

Notes due 2028, Notes due 2026 and Notes due 2025

The Company carries the Notes due 2028 and Notes due 2026 at face value less issuance costs on its condensed consolidated balance sheets, and Notes due 2025 at face value less unamortized discount and issuance costs on its condensed consolidated balance sheets. As of June 30, 2022, the fair value of the Notes due 2028, Notes due 2026 and Notes due 2025 was $568.2 million, $611.9 million and $256.5 million, respectively. The fair value as of June 30, 2022 was determined based on the closing trading price per $100 principal amount as of the last day of trading for the period. The Company considers the fair value of the Notes due 2028, Notes due 2026 and Notes due 2025 to be a Level 2 measurement as they are not actively traded.

Investments in debt securities

In January 2021, the Company invested approximately $25.0 million in a privately-held company. The Company concluded the investment qualifies as an investment in a debt security, as it accrues interest and principal plus accrued interest becomes payable back to the Company at certain dates unless it is converted to equity at a pre-determined price. As the investment includes a conversion option, the Company has elected to account for this investment under the fair value option and any change in fair value of the investment is recognized in “Other income (expense), net” in the Company’s condensed consolidated statement of operations for that period. Further, the Company has concluded that the Company’s investment in a debt security is considered to be a Level 3 measurement due to the use of significant unobservable inputs in the valuation model. The fair value was

determined using discounted cash flow methodology and assumptions include implied yield and change in estimated term of investment being held-to-maturity.

In September 2021, the Company invested approximately $13.0 million in secured convertible promissory notes issued by the stockholders of a privately-held company. The investment qualifies as an investment in a debt security and will accrete interest and principal plus accrued interest that becomes payable at certain dates unless it is converted to equity at a pre-determined price. As the investment includes a conversion option, the Company has elected to account for this investment under the fair value option and any change in fair value of the investment is recognized in “Other income (expense), net” in the Company’s condensed consolidated statement of operations for that period. Further, the Company has concluded that the Company’s investment in a debt security is considered a Level 3 measurement due to the use of significant unobservable inputs in the valuation model. Principal plus accrued interest receivable of the investment approximates the fair value.

Investment in debt securities are recorded in “Other assets” on the accompanying condensed consolidated balance sheet as of June 30, 2022. The changes in the balance in investments in debt securities during the period are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Balance at beginning of period	$	39,926	$	26,437	$	41,042	$	—
Investment	—		20,000		—		45,000
Fair value adjustments included in other (expense) income, net	987		932		(129)		2,369
Balance at end of period	$	40,913	$	47,369	$	40,913	$	47,369

Contingent consideration

The estimated fair value of the contingent consideration incurred in connection with the Company’s acquisition of Sofdesk Inc. is considered a Level 3 measurement due to the use of significant unobservable inputs. These unobservable inputs include probability assessment of expected future customer count over the period in which the obligation is expected to be settled. The value was determined using a discounted risk-neutral expected (probability-weighted) cash flow methodology. The resulting expected contingent consideration payment is discounted back to present value using the Company’s cost of debt. The fair value of contingent consideration arrangement is reassessed quarterly based on assumptions used in the Company’s latest projections and input provided by management. Any change in the fair value estimate, which could include accretion of interest expense due to passage of time as well as any changes in the inputs to the model, is recorded in the Company’s condensed consolidated statement of operations for that period.

The following table reflects the activity for the Company’s contingent consideration liabilities measured at fair value using Level 3 inputs for the six months ended June 30, 2022:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Balance at beginning of period	$	—	$	3,540	$	3,710	$	—
Addition	—		—		—		3,500
Fair value adjustments included in other income (expense), net	—		56		15		96
Paid	—		—		(3,725)		—
Balance at end of period	$	—	$	3,596	$	—	$	3,596

Warranty obligations.

Fair Value Option for Warranty Obligations Related to Products Sold Since January 1, 2014

The Company estimates the fair value of warranty obligations by calculating the warranty obligations in the same manner as for sales prior to January 1, 2014 and applying an expected present value technique to that result. The expected present value technique, an income approach, converts future amounts into a single current discounted amount. In addition to the key estimates of failure rates, claim rates and replacement costs, the Company used certain Level 3 inputs which are unobservable and significant to the overall fair value measurement. Such additional assumptions included a discount rate based on the Company’s credit-adjusted risk-free rate and compensation comprised of a profit element and risk premium required of a market participant to assume the obligation.

The following table provides information regarding changes in nonfinancial liabilities related to the Company’s warranty obligations measured at fair value on a recurring basis using significant unobservable inputs designated as Level 3 for the periods indicated:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Balance at beginning of period	$	61,586	$	33,319	$	51,007	$	28,736
Accruals for warranties issued during period	11,120		3,319		19,890		7,213
Changes in estimates	14,692		2,755		18,591		5,338
Settlements	(4,668)		(1,910)		(8,724)		(3,825)
Increase due to accretion expense	1,828		1,104		3,343		2,047
Other	(10,636)		(550)		(10,185)		(1,472)
Balance at end of period	$	73,923	$	38,037	$	73,923	$	38,037

Quantitative and Qualitative Information about Level 3 Fair Value Measurements

As of June 30, 2022 and December 31, 2021, the significant unobservable inputs used in the fair value measurement of the Company’s liabilities designated as Level 3 are as follows, of which the monetary impact for change in discount rate is captured in “Other” in the table above:

			Percent Used (Weighted Average)
Item Measured at Fair Value	Valuation Technique	Description of Significant Unobservable Input	June 30, 2022	December 31, 2021
Warranty obligations for products sold since January 1, 2014	Discounted cash flows	Profit element and risk premium	16%	15%
		Credit-adjusted risk-free rate	16%	12%

Sensitivity of Level 3 Inputs - Warranty Obligations

Each of the significant unobservable inputs is independent of the other. The profit element and risk premium are estimated based on requirements of a third-party participant willing to assume the Company’s warranty obligations. The credit‑adjusted risk‑free rate (“discount rate”) is determined by reference to the Company’s own credit standing at the fair value measurement date. Increasing the profit element and risk premium input by 100 basis points would result in a $0.6 million increase to the liability. Decreasing the profit element and risk premium by 100 basis points would result in a $0.6 million reduction of the liability. Increasing the discount rate by 100 basis points would result in a $2.5 million reduction of the liability. Decreasing the discount rate by 100 basis points would result in a $2.8 million increase to the liability.

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DEBT

6 Months Ended

Jun. 30, 2022

Debt Disclosure [Abstract]

DEBT

DEBT

The following table provides information regarding the Company’s debt:

	June 30, 2022		December 31, 2021
	(In thousands)
Convertible notes
Notes due 2028	$	575,000	$	575,000
Less: unamortized debt discount	—		(143,636)
Less: unamortized debt issuance costs	(7,359)		(5,775)
Carrying amount of Notes due 2028 (1)	567,641		425,589
Notes due 2026	632,500		632,500
Less: unamortized debt discount	—		(104,755)
Less: unamortized debt issuance costs	(7,312)		(6,678)
Carrying amount of Notes due 2026 (1)	625,188		521,067
Notes due 2025	102,175		102,175
Less: unamortized debt discount	(12,447)		(14,584)
Less: unamortized debt issuance costs	(1,299)		(1,539)
Carrying amount of Notes due 2025	88,429		86,052
Notes due 2023	5,000		5,000
Less: unamortized issuance costs	(43)		(62)
Carrying amount of Notes due 2023	4,957		4,938
Total carrying amount of debt	1,286,215		1,037,646
Less: current portion of convertible notes	(88,429)		(86,052)
Debt, non-current	$	1,197,786	$	951,594

(1)    The net carrying amount was increased on January 1, 2022 as a result of the adoption of ASU 2020-06. Refer to Note 2, Summary of Significant Accounting Policies, in this Quarterly Report on Form 10-Q for further information.

Convertible Senior Notes due 2028

On March 1, 2021, the Company issued $575.0 million aggregate principal amount of the Notes due 2028. The Notes due 2028 will not bear regular interest, and the principal amount of the Notes due 2028 will not accrete. The Notes due 2028 are general unsecured obligations and are governed by an indenture between the Company and U.S. Bank National Association, as trustee. The Notes due 2028 will mature on March 1, 2028, unless earlier repurchased by the Company or converted at the option of the holders. The Company received approximately $566.4 million in net proceeds, after deducting the initial purchasers’ discount, from the issuance of the Notes due 2028.

The initial conversion rate for the Notes due 2028 is 3.5104 shares of common stock per $1,000 principal amount of the Notes due 2028 (which represents an initial conversion price of approximately $284.87 per share). The conversion rate for the Notes due 2028 will be subject to adjustment upon the occurrence of certain specified events but will not be adjusted for any accrued and unpaid special interest, if any. In addition, if a make-whole fundamental change or a redemption with respect to the Notes due 2028 occurs prior to the maturity date, under certain circumstances as specified in the relevant indenture, the Company will increase the conversion rate for the Notes due 2028 by a number of additional shares of the Company’s common stock for a holder that elects to convert its notes in connection with such make-whole fundamental change or redemption. Upon conversion, the Company will settle conversions of the Notes due 2028 through payment or delivery, as the case may be, of cash, shares of its common stock or a combination of cash and shares of its common stock, at the Company’s election.

The Company may not redeem the Notes due 2028 prior to September 6, 2024. The Company may redeem for cash all or any portion of the Notes due 2028, at the Company’s election, on or after September 6, 2024, if the last reported sale price of the Company’s common stock has been greater than or equal to 130% of the conversion price then in effect for the Notes due 2028 (i.e. $370.33, which is 130% of the current conversion price for the Notes due 2028) for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period ending on, and including, the trading day immediately preceding the date on which the Company provides notice of redemption. The redemption price will equal 100% of the principal amount of the Notes due 2028 to be redeemed, plus accrued and unpaid special interest, if any to, but excluding, the relevant redemption date. No sinking fund is provided for the Notes due 2028.

The Notes due 2028 may be converted on any day prior to the close of business on the business day immediately preceding September 1, 2027, in multiples of $1,000 principal amount, at the option of the holder only under any of the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on June 30, 2021 (and only during such calendar quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price for the Notes due 2028 (i.e., $370.33 which is 130% of the current conversion price for the Notes due 2028) on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the “Measurement Period”) in which the “trading price” (as defined in the relevant indenture) per $1,000 principal amount of notes for each trading day of the Measurement Period was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate for the Notes due 2028 on each such trading day; (3) if the Company calls any or all of the Notes due 2028 for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events. On and after September 1, 2027 until the close of business on the second scheduled trading day immediately preceding the maturity date of March 1, 2028, holders of the Notes due 2028 may convert their notes at any time, regardless of the foregoing circumstances. Upon the occurrence of a fundamental change (as defined in the relevant indenture), holders may require the Company to repurchase all or a portion of their Notes due 2028 for cash at a price equal to 100% of the principal amount of the notes to be repurchased plus any accrued and unpaid special interest, if any, to, but excluding, the fundamental change repurchase date.

In accounting for the issuance of the Notes due 2028 on March 1, 2021, the Company separated the Notes due 2028 into liability and equity components. The carrying amount of the liability component of approximately $415.0 million was calculated by using a discount rate of 4.77%, which was the Company’s borrowing rate on the date of the issuance of the Notes due 2028 for a similar debt instrument without the conversion feature. The carrying amount of the equity component of approximately $160.0 million, representing the

conversion option, was determined by deducting the fair value of the liability component from the par value of the Notes due 2028. The equity component of the Notes due 2028 was included in additional paid-in capital in the condensed consolidated balance sheet through December 31, 2021 and was not remeasured. The difference between the principal amount of the Notes due 2028 and the liability component (the “debt discount”) was amortized to interest expense using the effective interest method over the term of the Notes due 2028 through December 31, 2021.

Through December 31, 2021, the Company separated the Notes due 2028 into liability and equity components which resulted in a tax basis difference associated with the liability component that represents a temporary difference. The Company recognized the deferred taxes of $40.1 million for the tax effect of that temporary difference as an adjustment to the equity component included in additional paid-in capital in the condensed consolidated balance sheet.

Debt issuance costs for the issuance of the Notes due 2028 were approximately $9.1 million, consisting of initial purchasers' discount and other issuance costs. In accounting for the transaction costs, the Company allocated the total amount incurred to the liability and equity components using the same proportions as the proceeds from the Notes due 2028. Transaction costs attributable to the liability component were approximately $6.6 million, which were recorded as debt issuance cost (presented as contra debt in the condensed consolidated balance sheet) and are being amortized to interest expense over the term of the Notes due 2028. The transaction costs attributable to the equity component were approximately $2.5 million and were netted with the equity component in stockholders’ equity.

Following the adoption of ASU 2020-06 as of January 1, 2022, the Company no longer records the conversion feature of Notes due 2028 in equity. Instead, the Company combined the previously separated equity component with the liability component, which together is now classified as debt, thereby eliminating the subsequent amortization of the debt discount as interest expense. Similarly, the portion of issuance costs previously allocated to equity was reclassified to the carrying amount of Notes due 2028 and is amortized over the remaining term of the notes. Accordingly, the Company recorded a net decrease to additional paid-in capital by approximately $117.3 million, net of tax to remove the equity component separately recorded for the conversion features associated with the Notes due 2028 and equity component associated with the issuance costs, an increase of approximately $141.3 million in the carrying value of Notes due 2028 to reflect the full principal amount of the Notes due 2028, net of issuance costs, a decrease to deferred tax liability of approximately $36.0 million, and a decrease to accumulated deficit of approximately $12.0 million, net of tax in the Company’s consolidated balance sheet with no impact on the Company’s consolidated statements of operations. As of June 30, 2022, the unamortized deferred issuance cost for the Notes due 2028 was $7.4 million on the condensed consolidated balance sheet.

The following table presents the total amount of interest cost recognized in the statement of operations relating to the Notes due 2028:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Amortization of debt discount	$	—	$	4,872	$	—	$	6,483
Amortization of debt issuance costs	327		236		643		315
Total interest cost recognized	$	327	$	5,108	$	643	$	6,798

Notes due 2028 Hedge and Warrant Transactions

In connection with the offering of the Notes due 2028, the Company entered into privately-negotiated convertible note hedge transactions (“Notes due 2028 Hedge”) pursuant to which the Company has the option to purchase a total of approximately 2.0 million shares of its common stock (subject to anti-dilution adjustments), which is the same number of shares initially issuable upon conversion of the Notes due 2028, at a price of $284.87 per share, which is the initial conversion price of the Notes due 2028. The total cost of the convertible note hedge transactions was approximately $161.6 million. The convertible note hedge transactions are expected generally to reduce potential dilution to the Company’s common stock upon any conversion of the Notes due 2028 and/or offset

any cash payments the Company is required to make in excess of the principal amount of converted notes, as the case may be.

Additionally, the Company separately entered into privately-negotiated warrant transactions (the “2028 Warrants”) whereby the Company sold warrants to acquire approximately 2.0 million shares of the Company’s common stock (subject to anti-dilution adjustments) at an initial strike price of $397.91 per share. The Company received aggregate proceeds of approximately $123.4 million from the sale of the 2028 Warrants. If the market value per share of the Company’s common stock, as measured under the 2028 Warrants, exceeds the strike price of the 2028 Warrants, the 2028 Warrants will have a dilutive effect on the Company’s earnings per share, unless the Company elects, subject to certain conditions, to settle the 2028 Warrants in cash. Taken together, the purchase of the Notes due 2028 Hedge and the sale of the 2028 Warrants are intended to reduce potential dilution from the conversion of the Notes due 2028 and to effectively increase the overall conversion price from $284.87 to $397.91 per share. The 2028 Warrants are only exercisable on the applicable expiration dates in accordance with the Notes due 2028 Hedge. Subject to the other terms of the 2028 Warrants, the first expiration date applicable to the Notes due 2028 Hedge is June 1, 2028, and the final expiration date applicable to the Notes due 2028 Hedge is July 27, 2028.

Given that the transactions meet certain accounting criteria, the Notes due 2028 Hedge and the 2028 Warrants transactions are recorded in stockholders’ equity, and they are not accounted for as derivatives and are not remeasured each reporting period.

Convertible Senior Notes due 2026

On March 1, 2021, the Company issued $575.0 million aggregate principal amount of the Notes due 2026. In addition, on March 12, 2021, the Company issued an additional $57.5 million aggregate principal amount of the Notes due 2026 pursuant to the initial purchasers’ full exercise of the over-allotment option for additional Notes due 2026. The Notes due 2026 will not bear regular interest, and the principal amount of the Notes due 2026 will not accrete. The Notes due 2026 are general unsecured obligations and are governed by an indenture between the Company and U.S. Bank National Association, as trustee. The Notes due 2026 will mature on March 1, 2026, unless earlier repurchased by the Company or converted at the option of the holders. The Company received approximately $623.0 million in net proceeds, after deducting the initial purchasers’ discount, from the issuance of the Notes due 2026.

The initial conversion rate for the Notes due 2026 is 3.2523 shares of common stock per $1,000 principal amount of the Notes due 2026 (which represents an initial conversion price of approximately $307.47 per share). The conversion rate for the Notes due 2026 will be subject to adjustment upon the occurrence of certain specified events but will not be adjusted for accrued and unpaid interest. In addition, if a make-whole fundamental change or a redemption with respect to the Notes due 2026 occurs prior to the maturity date, under certain circumstances as specified in the relevant indenture, the Company will increase the conversion rate for the Notes due 2026 by a number of additional shares of the Company’s common stock for a holder that elects to convert its notes in connection with such make-whole fundamental change or redemption. Upon conversion, the Company will settle conversions of Notes due 2026 through payment or delivery, as the case may be, of cash, shares of its common stock or a combination of cash and shares of its common stock, at the Company’s election.

The Company may not redeem the Notes due 2026 prior to the September 6, 2023. The Company may redeem for cash all or any portion of the Notes due 2026, at the Company’s election, on or after September 6, 2023, if the last reported sale price of the Company’s common stock has been greater than or equal to 130% of the conversion price then in effect for the Notes due 2026 (i.e., $399.71, which is 130% of the current conversion price for the Notes due 2026) for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading day period ending on, and including, the trading day immediately preceding the date on which the Company provides notice of redemption. The redemption price will equal 100% of the principal amount of the Notes due 2026 to be redeemed, plus accrued and unpaid special interest, if any, to, but excluding, the relevant redemption date for the Notes due 2026. The redemption price will be increased as described in the relevant indentures by a number of additional shares of the Company in connection with such optional redemption by the Company. No sinking fund is provided for the Notes due 2026.

The Notes due 2026 may be converted on any day prior to the close of business on the business day immediately preceding September 1, 2025, in multiples of $1,000 principal amount, at the option of the holder only

under any of the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on June 30, 2021 (and only during such calendar quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price of the Notes due 2026 (i.e., $399.71, which is 130% of the current conversion price for the Notes due 2026) on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the “measurement period”) in which the “trading price” (as defined in the relevant indenture) per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate for Notes due 2026 on each such trading day; (3) if the Company calls any or all of the Notes due 2026 for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events. On and after September 1, 2025 until the close of business on the second scheduled trading day immediately preceding the maturity date of March 1, 2026, holders of the Notes due 2026 may convert their notes at any time, regardless of the foregoing circumstances. Upon the occurrence of a fundamental change (as defined in the relevant indenture), holders may require the Company to repurchase all or a portion of their Notes due 2026 for cash at a price equal to 100% of the principal amount of the notes to be repurchased plus any accrued and unpaid special interest, if any, to, but excluding, the fundamental change repurchase date.

In accounting for the issuance of the Notes due 2026 on March 1, 2021, the Company separated the Notes due 2026 into liability and equity components. The carrying amount of the liability component of approximately $509.0 million was calculated by using a discount rate of 4.44%, which was the Company’s borrowing rate on the date of the issuance of the Notes due 2026 for a similar debt instrument without the conversion feature. The carrying amount of the equity component of approximately $123.5 million, representing the conversion option, was determined by deducting the fair value of the liability component from the par value of the Notes due 2026. The equity component of the Notes due 2026 was included in additional paid-in capital in the condensed consolidated balance sheet through December 31, 2021 and was not remeasured. The difference between the principal amount of the Notes due 2026 and the liability component (the “debt discount”) was amortized to interest expense using the effective interest method over the term of the Notes due 2026 through December 31, 2021.

Through December 31, 2021, the Company separated the Notes due 2026 into liability and equity components which resulted in a tax basis difference associated with the liability component that represents a temporary difference. The Company recognized the deferred taxes of $31.0 million for the tax effect of that temporary difference as an adjustment to the equity component included in additional paid-in capital in the condensed consolidated balance sheet.

Debt issuance costs for the issuance of the Notes due 2026 were approximately $10.0 million, consisting of initial purchasers' discount and other issuance costs. In accounting for the transaction costs, the Company allocated the total amount incurred to the liability and equity components using the same proportions as the proceeds from the Notes due 2026. Transaction costs attributable to the liability component were approximately $8.0 million, which were recorded as debt issuance cost (presented as contra debt in the condensed consolidated balance sheet) and are being amortized to interest expense over the term of the Notes due 2026. The transaction costs attributable to the equity component were approximately $2.0 million and were netted with the equity component in stockholders’ equity.

Following the adoption of ASU 2020-06 as of January 1, 2022, the Company no longer records the conversion feature of Notes due 2026 in equity. Instead, the Company combined the previously separated equity component with the liability component, which together is now classified as debt, thereby eliminating the subsequent amortization of the debt discount. Similarly, the portion of issuance costs previously allocated to equity was reclassified to the carrying amount debt and is amortized over the remaining term of the notes. Accordingly, the Company recorded a net decrease to additional paid-in capital by approximately $90.6 million, net of tax to remove the equity component separately recorded for the conversion features associated with the Notes due 2026 and equity component associated with the issuance costs, an increase of approximately $103.2 million in the carrying value of its Notes due 2026 to reflect the full principal amount of the Notes due 2026 outstanding net of issuance costs, a decrease to deferred tax liability of approximately $26.3 million, and a decrease to accumulated deficit of

approximately $13.7 million, net of tax in the Company’s consolidated balance sheet with no impact on the Company’s consolidated statements of operations. As of June 30, 2022, the unamortized deferred issuance cost for the Notes due 2026 was $7.3 million on the condensed consolidated balance sheet.

The following table presents the total amount of interest cost recognized in the statement of operations relating to the Notes due 2026:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Amortization of debt discount	$	—	$	5,587	$	—	$	7,373
Amortization of debt issuance costs	502		404		987		539
Total interest cost recognized	$	502	$	5,991	$	987	$	7,912

Notes due 2026 Hedge and Warrant Transactions

In connection with the offering of the Notes due 2026 (including in connection with the issuance of additional Notes due 2026 upon the initial purchasers’ exercise of their over-allotment option), the Company entered into privately-negotiated convertible note hedge transactions (the “Notes due 2026 Hedge”) pursuant to which the Company has the option to purchase a total of approximately 2.1 million shares of its common stock (subject to anti-dilution adjustments), which is the same number of shares initially issuable upon conversion of the Notes due 2026, at a price of $307.47 per share, which is the initial conversion price of the Notes due 2026. The total cost of the Notes due 2026 Hedge was approximately $124.6 million. The Notes due 2026 Hedge are expected generally to reduce potential dilution to the Company’s common stock upon any conversion of the Notes due 2026 and/or offset any cash payments the Company is required to make in excess of the principal amount of converted notes, as the case may be.

Additionally, the Company separately entered into privately-negotiated warrant transactions, including in connection with the issuance of additional Notes due 2026 upon the initial purchasers’ exercise of their over-allotment option (the “2026 Warrants”), whereby the Company sold warrants to acquire approximately 2.1 million shares of the Company’s common stock (subject to anti-dilution adjustments) at an initial strike price of $397.91 per share. The Company received aggregate proceeds of approximately $97.4 million from the sale of the 2026 Warrants. If the market value per share of the Company’s common stock, as measured under the 2026 Warrants, exceeds the strike price of the 2026 Warrants, the 2026 Warrants will have a dilutive effect on the Company’s earnings per share, unless the Company elects, subject to certain conditions, to settle the 2026 Warrants in cash. Taken together, the purchase of the Notes due 2026 Hedge and the sale of the 2026 Warrants are intended to reduce potential dilution from the conversion of the Notes due 2026 and to effectively increase the overall conversion price from $307.47 to $397.91 per share. The 2026 Warrants are only exercisable on the applicable expiration dates in accordance with the 2026 Warrants. Subject to the other terms of the 2026 Warrants, the first expiration date applicable to the Warrants is June 1, 2026, and the final expiration date applicable to the 2026 Warrants is July 27, 2026.

Given that the transactions meet certain accounting criteria, the Notes due 2026 hedge and the 2026 Warrants transactions are recorded in stockholders’ equity, and they are not accounted for as derivatives and are not remeasured each reporting period.

Convertible Senior Notes due 2025

On March 9, 2020, the Company issued $320.0 million Notes due 2025. The Notes due 2025 are general unsecured obligations and bear interest at an annual rate of 0.25% per year, payable semi-annually on March 1 and September 1 of each year, beginning September 1, 2020. The Notes due 2025 are governed by an indenture between the Company and U.S. Bank National Association, as trustee. The Notes due 2025 will mature on March 1, 2025, unless earlier repurchased by the Company or converted at the option of the holders. The Company may not redeem the notes prior to the maturity date, and no sinking fund is provided for the notes. The Notes due 2025 may be converted, under certain circumstances as described below, based on an initial conversion rate of 12.2637 shares of common stock per $1,000 principal amount (which represents an initial conversion price of $81.54 per share). The conversion rate for the Notes due 2025 will be subject to adjustment upon the occurrence of certain specified events but will not be adjusted for accrued and unpaid interest. In addition, upon the occurrence of a make-whole fundamental change (as defined in the relevant indenture), the Company will, in certain circumstances, increase the conversion rate by a number of additional shares for a holder that elects to convert its notes in connection with such make-whole fundamental change. The Company received approximately $313.0 million in net proceeds, after deducting the initial purchasers’ discount, from the issuance of the Notes due 2025.

The Notes due 2025 may be converted prior to the close of business on the business day immediately preceding September 1, 2024, in multiples of $1,000 principal amount, at the option of the holder only under the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on June 30, 2020 (and only during such calendar quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the “measurement period”) in which the “trading price” (as defined in the relevant indenture) per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate on each such trading day; or (3) upon the occurrence of specified corporate events. On and after September 1, 2024 until the close of business on the second scheduled trading day immediately preceding the maturity date of March 1, 2025, holders may convert their notes at any time, regardless of the foregoing circumstances. Upon the occurrence of a fundamental change (as defined in the relevant indenture), holders may require the Company to repurchase all or a portion of their Notes due 2025 for cash at a price equal to 100% of the principal amount of the notes to be repurchased plus any accrued and unpaid interest to, but excluding, the fundamental change repurchase date.

As of June 30, 2022 and December 31, 2021, the sale price of the Company’s common stock was greater than or equal to $106.00 (130% of the notes conversion price) for at least 20 trading days (whether consecutive or not) during a period of 30 consecutive trading days preceding the quarter-ended June 30, 2022 and December 31, 2021. As a result, as of July 1, 2022, the Notes due 2025 are convertible at the holders’ option through September 30, 2022. Accordingly, the Company classified the net carrying amount of the Notes due 2025 of $88.4 million and $86.1 million as Debt, current on the condensed consolidated balance sheet as of June 30, 2022 and December 31, 2021, respectively. From July 1, 2022 through the date this Quarterly Report on Form 10-Q is available to be issued, the Company has not received any requests for conversion of the Notes due 2025.

For the period from March 9, 2020, the issuance date, through May 19, 2020, the number of authorized and unissued shares of the Company’s common stock that are not reserved for other purposes was less than the maximum number of underlying shares that would be required to settle the Notes due 2025 into equity. Accordingly, unless and until the Company had a number of authorized shares that were not issued or reserved for any other purpose that equaled or exceeded the maximum number of underlying shares (the “Share Reservation Condition”), the Company would have been required to pay to the converting holder in respect of each $1,000 principal amount of notes being converted solely in cash in an amount equal to the sum of the daily conversion values for each of the 20 consecutive trading days during the related observation period. However, following satisfaction of the Share Reservation Condition, the Company could settle conversions of notes through payment or delivery, as the case may be, of cash, shares of the Company’s common stock or a combination of cash and shares of its common stock, at the Company’s election. As further discussed below, the Company satisfied the Share Reservation Condition during May 2020.

In accounting for the issuance of the Notes due 2025, on March 9, 2020, the conversion option of the Notes due 2025 was deemed an embedded derivative requiring bifurcation from the Notes due 2025 (the “host contract”) and separate accounting as an embedded derivative liability, as a result of the Company not having the necessary number of authorized but unissued shares of its common stock available to settle the conversion option of the Notes due 2025 in shares. The proceeds from the Notes due 2025 were first allocated to the embedded derivative liability and the remaining proceeds were then allocated to the host contract. On March 9, 2020, the carrying amount of the embedded derivative liability of $68.7 million representing the conversion option was determined using the Binomial Lattice model and the remaining $251.3 million was allocated to the host contract. The difference between the principal amount of the Notes due 2025 and the fair value of the host contract (the “debt discount”) is amortized to interest expense using the effective interest method over the term of the Notes due 2025.

On May 20, 2020, at the Company’s annual meeting of stockholders, the stockholders approved an amendment to the Amended and Restated Certificate of Incorporation to increase the number of authorized shares of the Company’s common stock, par value $0.00001 per share, from 150,000,000 shares to 200,000,000 shares (the “Amendment”). The Amendment became effective upon filing with the Secretary of State of Delaware on May 20, 2020. As a result, the Company satisfied the Share Reservation Condition. The Company may now settle the Notes due 2025 and warrants issued in conjunction with the Notes due 2025 (the “2025 Warrants”) through payment or delivery, as the case may be, of cash, shares of its common stock or a combination of cash and shares of its common stock, at the Company’s election. Accordingly, on May 20, 2020, the embedded derivative liability was remeasured at a fair value of $116.3 million and was then reclassified to additional paid-in-capital in the condensed consolidated balance sheet in the second quarter of 2020 and is no longer remeasured as long as it continues to meet the conditions for equity classification. The Company recorded the change in the fair value of the embedded derivative in other expense, net in the condensed consolidated statement of operations during the year ended December 31, 2020.

The Company separated the Notes due 2025 into liability and equity components which resulted in a tax basis difference associated with the liability component that represents a temporary difference. The Company recognized the deferred taxes of $0.2 million for the tax effect of that temporary difference as an adjustment to the equity component included in additional paid-in capital in the condensed consolidated balance sheet.

Debt issuance costs for the issuance of the Notes due 2025 were approximately $7.6 million, consisting of initial purchasers' discount and other issuance costs. In accounting for the transaction costs, the Company allocated the total amount incurred to the Notes due 2025 host contract. Transaction costs were recorded as debt issuance cost (presented as contra debt in the condensed consolidated balance sheet) and are being amortized to interest expense over the term of the Notes due 2025.

Partial repurchase of Notes due 2025

Concurrently with the offering of the Notes due 2026 and Notes due 2028, the Company entered into separately- and privately-negotiated transactions to repurchase approximately $217.7 million aggregate principal amount of the Notes due 2025. The Company paid $217.7 million in cash and issued approximately 1.67 million shares of its common stock to the holders of the repurchased notes with an aggregate fair value of $302.7 million, representing the conversion value in excess of the principal amount of the Notes due 2025, which were fully offset by shares received from the Company’s settlement of the associated note hedging arrangements discussed below. The total amount of $217.7 million paid to partially settle the repurchases of the Notes due 2025 was allocated between the liability and equity components of the amount extinguished by determining the fair value of the liability component immediately prior to the note repurchases and allocating that portion of the conversion price to the liability component in the amount of $184.5 million. The residual of the conversion price of $4.3 million of the repurchased Notes due 2025, net of inducement loss of $37.5 million for additional shares issued, was allocated to the equity component of the repurchased Notes due 2025 as an increase of additional paid-in capital. The fair value of the note settlement for such repurchases was calculated using a discount rate of 4.35%, representing an estimate of the Company's borrowing rate at the date of repurchase with a remaining expected life of approximately 4.1 years. As part of the settlement of the repurchase of the Notes due 2025, the Company wrote-off the $38.5 million unamortized debt discount and $4.1 million debt issuance cost apportioned to the principal amount of Notes due 2025 repurchased. The Company recorded a loss on partial settlement of the repurchased Notes due 2025 of $9.4 million in Other income (expense), net in the six months ended June 30, 2021, representing the difference between the consideration attributed to the liability component and the sum of the net carrying amount of the liability

component and unamortized debt issuance costs. Further, the Company also recorded loss on inducement of $37.5 million in Other income (expense), net in the six months ended June 30, 2021, representing the difference between the fair value of the shares that would have been issued under the original conversion terms with respect to the repurchased Notes due 2025.

During the second quarter of 2021, $0.1 million in aggregate principal amount of the Notes due 2025 were converted, and the principal amount of the converted Notes due 2025 was repaid in cash. In connection with such conversions during the second quarter of 2021, the Company also issued 485 shares of its common stock to the holders of the converted Notes due 2025, with an aggregate fair value of $0.1 million, representing the conversion value in excess of the principal amount of the Notes due 2025, which were fully offset by shares received from the settlements of the associated note hedging arrangements. Following the repurchase transactions summarized above, as of June 30, 2022, $102.2 million aggregate principal amount of the Notes due 2025 remained outstanding.

The following table presents the total amount of interest cost recognized relating to the Notes due 2025:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Contractual interest expense	$	64	$	64	$	128	$	214
Amortization of debt discount	1,088		1,033		2,137		3,422
Amortization of debt issuance costs	123		122		241		416
Total interest cost recognized	$	1,275	$	1,219	$	2,506	$	4,052

The derived effective interest rate on the Notes due 2025 host contract was determined to be 5.18%, which remains unchanged from the date of issuance. The remaining unamortized debt discount was $12.4 million as of June 30, 2022, and will be amortized over approximately 2.7 years from June 30, 2022.

Notes due 2025 Hedge and Warrant Transactions

In connection with the offering of the Notes due 2025, the Company entered into privately-negotiated convertible note hedge transactions (the “Notes due 2025 Hedge”) pursuant to which the Company has the option to purchase a total of approximately 3.9 million shares of its common stock (subject to anti-dilution adjustments), which is the same number of shares initially issuable upon conversion of the notes, at a price of $81.54 per share, which is the initial conversion price of the Notes due 2025. The total cost of the convertible note hedge transactions was approximately $89.1 million. The convertible note hedge transactions are expected generally to reduce potential dilution to the Company’s common stock upon any conversion of the Notes due 2025 and/or offset any cash payments the Company is required to make in excess of the principal amount of converted notes, as the case may be.

Additionally, the Company separately entered into privately-negotiated warrant transactions in connection with the offering of the Notes due 2025 whereby the Company sold the 2025 Warrants to acquire approximately 3.9 million shares of the Company’s common stock (subject to anti-dilution adjustments) at an initial strike price of $106.94 per share. The Company received aggregate proceeds of approximately $71.6 million from the sale of the 2025 Warrants. If the market value per share of the Company’s common stock, as measured under the 2025 Warrants, exceeds the strike price of the 2025 Warrants, the 2025 Warrants will have a dilutive effect on the Company’s earnings per share, unless the Company elects, subject to certain conditions, to settle the 2025 Warrants in cash. Taken together, the purchase of the convertible note hedges in connection with the Notes due 2025 Hedge and the sale of the 2025 Warrants are intended to reduce potential dilution from the conversion of the Notes due 2025 and to effectively increase the overall conversion price from $81.54 to $106.94 per share. The 2025 Warrants are only exercisable on the applicable expiration dates in accordance with the agreements relating to each of the 2025 Warrants. Subject to the other terms of the 2025 Warrants, the first expiration date applicable to the 2025 Warrants is June 1, 2025, and the final expiration date applicable to the 2025 Warrants is September 23, 2025.

During the first quarter of 2021, in connection with the repurchase of $217.7 million aggregate principal amount of the Notes due 2025 summarized above, the Company entered into partial unwind agreements with respect to certain of the Notes due 2025 Hedge and the 2025 Warrants. In connection with these unwind transactions, the Company received shares of the Company’s common stock as a termination payment for the portion of the Notes due 2025 Hedge that were unwound, and the Company issued shares of its common stock as a termination payment for the portion of the 2025 Warrants that were unwound. As a result of the unwind agreements for the Notes due 2025 Hedge and the 2025 Warrants, the Company received 1.9 million of the Company’s common stock from the Notes due 2025 Hedge settlement and issued 1.8 million of the Company’s common stock from the 2025 Warrants that were unwound. Following the unwind transactions summarized above, as of June 30, 2022, options to purchase approximately 1.3 million shares of common stock remained outstanding under the Notes due 2025 Hedge, and 2025 Warrants exercisable to purchase approximately 1.3 million shares remained outstanding.

For the period from March 9, 2020, the issuance date of the Notes due 2025 Hedge and 2025 Warrants, through May 19, 2020, the number of authorized and unissued shares of the Company’s common stock that are not reserved for other purposes was less than the maximum number of underlying shares that will be required to settle the Notes due 2025 through the delivery of shares of the Company’s common stock. Accordingly, the Notes due 2025 Hedge and 2025 Warrants could only be settled on net cash settlement basis. As a result, the Notes due 2025 Hedge and 2025 Warrants were classified as a Convertible notes hedge asset and 2025 Warrants liability, respectively, in the condensed consolidated balance sheet and the change in fair value of derivatives was included in other expense, net in the condensed consolidated statement of operations.

On May 20, 2020, at the Company’s annual meeting of stockholders, the stockholders approved the Amendment and satisfied the Share Reservation Condition (as discussed above), and as a result, the Convertible notes hedge asset and the 2025 Warrants liabilities were remeasured at a fair value of $117.1 million and $96.4 million, respectively, and were then reclassified to additional paid-in-capital in the condensed consolidated balance sheet in the second quarter of 2020 and is no longer remeasured as long as they continue to meet the conditions for equity classification. The change in the fair value of the Convertible notes hedge asset and the 2025 Warrants liability were recorded in other expense, net in the condensed consolidated statements of operations during the six months ended June 30, 2021.

Convertible Senior Notes due 2023

In August 2018, the Company sold $65.0 million aggregate principal amount of 4.0% convertible senior notes due 2023 (the “Notes due 2023”) in a private placement. On May 30, 2019, the Company entered into separately and privately-negotiated transactions with certain holders of the Notes due 2023 resulting in the repurchase and exchange, as of June 5, 2019, of $60.0 million aggregate principal amount of the notes in consideration for the issuance of 10,801,080 shares of common stock and separate cash payments totaling $6.0 million. As of both June 30, 2022 and December 31, 2021, $5.0 million aggregate principal amount of the Notes due 2023 remained outstanding.

The remaining outstanding Notes due 2023 are general unsecured obligations and bear interest at a rate of 4.0% per year, payable semi-annually on February 1 and August 1 of each year. The Notes due 2023 are governed by an indenture between the Company and U.S. Bank National Association, as trustee. The remaining outstanding Notes due 2023 will mature on August 1, 2023, unless earlier repurchased by the Company or converted at the option of the holders. The Company may not redeem the remaining Notes due 2023 prior to the maturity date, and no sinking fund is provided for such notes. The remaining Notes due 2023 are convertible, at a holder’s election, in multiples of $1,000 principal amount, into shares of the Company’s common stock based on the applicable conversion rate. The initial conversion rate for such notes is 180.018 shares of common stock per $1,000 principal amount of notes (which is equivalent to an initial conversion price of approximately $5.56 per share). The conversion rate and the corresponding conversion price are subject to adjustment upon the occurrence of certain events but will not be adjusted for any accrued and unpaid interest. Holders of the remaining Notes due 2023 who convert their notes in connection with a make-whole fundamental change (as defined in the applicable indenture) are, under certain circumstances, entitled to an increase in the conversion rate. Additionally, in the event of a fundamental change, holders of the remaining Notes due 2023 may require the Company to repurchase all or a portion of their notes at a price equal to 100% of the principal amount of notes, plus any accrued and unpaid interest, including any additional interest to, but excluding, the repurchase date. Holders may convert all or any

portion of their Notes due 2023 at their option at any time prior to the close of business on the business day immediately preceding the maturity date, in multiples of $1,000 principal amount.

The following table presents the amount of interest cost recognized relating to the contractual interest coupon and the amortization of debt issuance costs of the Notes due 2023:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Contractual interest expense	$	50	$	50	$	100	$	100
Amortization of debt issuance costs	10		10		20		20
Total interest costs recognized	$	60	$	60	$	120	$	120

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COMMITMENTS AND CONTINGENCIES

6 Months Ended

Jun. 30, 2022

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

Operating Leases

The Company leases office facilities under noncancelable operating leases that expire on various dates through 2032, some of which may include options to extend the leases for up to 12 years.

The components of lease expense are presented as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Operating lease costs	$	2,052	$	1,815	$	3,989	$	3,446

The components of lease liabilities are presented as follows:

	June 30, 2022		December 31, 2021
	(In thousands except years and percentage data)
Operating lease liabilities, current (Accrued liabilities)	$	3,804	$	3,830
Operating lease liabilities, non-current (Other liabilities)	16,181		11,920
Total operating lease liabilities	$	19,985	$	15,750
Supplemental lease information:
Weighted average remaining lease term	5.8 years		5.9 years
Weighted average discount rate	6.3%		7.4%

Supplemental cash flow and other information related to operating leases, are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	1,325	$	1,425	$	2,843	$	2,786
Non-cash investing activities:
Lease liabilities arising from obtaining right-of-use assets	$	—	$	—	$	6,742	$	—

Undiscounted cash flows of operating lease liabilities as of June 30, 2022 are as follows:

	Lease Amounts
	(In thousands)
Year:
2022 (remaining six months)	$	2,417
2023	5,141
2024	4,281
2025	3,577
2026	2,618
Thereafter	5,825
Total lease payments	23,859
Less: imputed lease interest	(3,874)
Total lease liabilities	$	19,985

Purchase Obligations

The Company has contractual obligations related to component inventory that its contract manufacturers procure on its behalf in accordance with its production forecast as well as other inventory related purchase commitments. As of June 30, 2022, these purchase obligations totaled approximately $439.4 million.

Litigation

From time-to-time, the Company may be involved in litigation relating to claims arising out of its operations, the ultimate disposition of which could have a material adverse effect on its operations, financial condition or cash flows. The Company is not currently involved in any material legal proceedings; however, the Company may be involved in material legal proceedings in the future. Such matters are subject to uncertainty and there can be no assurance that such legal proceedings will not have a material effect on its business, results of operations, financial position or cash flows.

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STOCK-BASED COMPENSATION

6 Months Ended

Jun. 30, 2022

Share-Based Payment Arrangement [Abstract]

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION

Stock-based Compensation Expense

Stock-based compensation expense for all stock-based awards, which includes stock options, restricted stock units (“RSUs”) and performance-based stock units (“PSUs”), expected to vest is measured at fair value on the date of grant and recognized ratably over the requisite service period.

In addition, as part of certain business acquisitions, the Company is obligated to issue shares of common stock of the Company as payment subject to achievement of certain targets. For such payments, the Company records stock-based compensation classified as post-combination expense ratably over the measurement period presuming the targets will be met.

The following table summarizes the components of total stock-based compensation expense included in the condensed consolidated statements of operations for the periods presented:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Cost of revenues	$	3,131	$	1,060	$	5,638	$	2,042
Research and development	16,266		5,467		29,995		11,216
Sales and marketing	22,176		5,335		35,233		8,872
General and administrative	11,491		3,450		29,995		8,026
Total	$	53,064	$	15,312	$	100,861	$	30,156

The following table summarizes the various types of stock-based compensation expense for the periods presented:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Stock options, RSUs and PSUs	$	47,228	$	14,361	$	91,340	$	28,201
Employee stock purchase plan	1,014		951		2,396		1,955
Post combination expense accrual (Accrued liabilities)	4,822		—		7,125		—
Total	$	53,064	$	15,312	$	100,861	$	30,156

As of June 30, 2022, there was approximately $319.8 million of total unrecognized stock-based compensation expense related to unvested equity awards, which are expected to be recognized over a weighted-average period of 2.3 years.

Equity Awards Activity

Stock Options

The following table summarizes stock option activity:

	Number of Shares Outstanding	Weighted- Average Exercise Price per Share		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value (1)
	(In thousands)			(Years)	(In thousands)
Outstanding at December 31, 2021	2,264	$	1.90
Granted	—	—
Exercised	(360)	1.74			$	65,153
Canceled	(1)	8.82
Outstanding at June 30, 2022	1,903	$	1.93	2.4	$	367,918
Vested and expected to vest at June 30, 2022	1,903	$	1.93	2.4	$	367,918
Exercisable at June 30, 2022	1,903	$	1.93	2.4	$	367,918

(1)    The intrinsic value of options exercised is based upon the value of the Company’s stock at exercise. The intrinsic value of options outstanding, vested and expected to vest, and exercisable as of June 30, 2022 is based on the closing price of the last trading day during the period ended June 30, 2022. The Company’s stock fair value used in this computation was $195.24 per share.

The following table summarizes information about stock options outstanding at June 30, 2022:

	Options Outstanding				Options Exercisable
Range of Exercise Prices	Number of Shares	Weighted- Average Remaining Life	Weighted- Average Exercise Price		Number of Shares	Weighted- Average Exercise Price
	(In thousands)	(Years)			(In thousands)
$0.70 —– $1.11	479	2.8	$	0.80	479	$	0.80
$1.29 —– $1.29	1,000	2.2	1.29		1,000	1.29
$1.31 —– $5.53	380	2.0	2.15		380	2.15
$14.58 —– $14.58	33	3.8	14.58		33	14.58
$64.17 —– $64.17	11	4.8	64.17		11	64.17
Total	1,903	2.4	$	1.93	1,903	$	1.93

Restricted Stock Units

The following table summarizes RSU activity:

	Number of Shares Outstanding	Weighted- Average Fair Value per Share at Grant Date		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value (1)
	(In thousands)			(Years)	(In thousands)
Outstanding at December 31, 2021	2,786	$	100.73
Granted	561	175.97
Vested	(916)	67.21			$	151,219
Canceled	(113)	139.67
Outstanding at June 30, 2022	2,318	130.32		1.2	$	452,664
Expected to vest at June 30, 2022	2,318	$	130.32	1.2	$	452,556

(1)    The intrinsic value of RSUs vested is based upon the value of the Company’s stock when vested. The intrinsic value of RSUs outstanding and expected to vest as of June 30, 2022 is based on the closing price of the last trading day during the period ended June 30, 2022. The Company’s stock fair value used in this computation was $195.24 per share.

Performance Stock Units

The following summarizes PSU activity:

	Number of Shares Outstanding	Weighted- Average Fair Value per Share at Grant Date		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value (1)
	(In thousands)			(Years)	(In thousands)
Outstanding at December 31, 2021	445	$	169.82
Granted	392	192.72
Vested	(303)	168.88			$	51,393
Canceled	(176)	170.96
Outstanding at June 30, 2022	358	$	195.14	0.7	$	69,900
Expected to vest at June 30, 2022	358	$	195.14	0.7	$	69,900

(1)    The intrinsic value of PSUs vested is based upon the value of the Company’s stock when vested. The intrinsic value of PSUs outstanding and expected to vest as of June 30, 2022 is based on the closing price of the last trading day during the period ended June 30, 2022. The Company’s stock fair value used in this computation was $195.24 per share.

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INCOME TAXES

6 Months Ended

Jun. 30, 2022

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXES

For the three months ended June 30, 2022 and 2021, the Company’s income tax provision of $15.2 million and $7.0 million, respectively, on a net income before income taxes of $92.2 million and $46.3 million, respectively, and for the six months ended June 30, 2022, the Company’s income tax provision of $20.8 million on a net income before income taxes of $149.6 million was calculated using the annualized effective tax rate method and was primarily due to projected tax expense in the U.S. and foreign jurisdictions that are profitable, partially offset by tax deduction from employee stock compensation reported as a discrete event.

For the six months ended June 30, 2021, the Company’s income tax benefit of $26.4 million, on a net income before income taxes of $44.7 million calculated using the annualized effective tax rate method, was primarily due to tax deduction in the first quarter of 2021 from employee stock compensation reported as a discrete event, partially offset by projected tax expense in the U.S. and foreign jurisdictions that are profitable.

For the three and six months ended June 30, 2022 and 2021, in accordance with FASB guidance for interim reporting of income tax, the Company has computed its benefit (provision) for income taxes based on a projected annual effective tax rate while excluding loss jurisdictions which cannot be benefited.

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NET INCOME PER SHARE

6 Months Ended

Jun. 30, 2022

Earnings Per Share [Abstract]

NET INCOME PER SHARE

NET INCOME PER SHARE

Basic net income per share is computed by dividing net income by the weighted average number of shares of common stock outstanding during the period. Diluted net income per share is computed in a similar manner, but it also includes the effect of potential common shares outstanding during the period, when dilutive. Potential common shares include stock options, RSUs, PSUs, shares to be purchased under the Company’s 2011 Employee Stock Purchase Plan (the “ESPP”), the Notes due 2023, 1.0% convertible senior notes due 2024 (the “Notes due 2024”), Notes due 2025, Notes due 2026, Notes due 2028, and warrant transactions in connection with the offering of the Notes due 2024 (the “2024 Warrants”), 2025 Warrants, 2026 Warrants and the 2028 Warrants. See Note 9, “Debt,” for additional information about the Company’s outstanding notes.

The following table presents the computation of basic and diluted net income per share for the periods presented:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands, except per share data)
Numerator:
Net income	$	76,976	$	39,351	$	128,797	$	71,049
Convertible Senior Notes interest and financing costs, net	662		45		1,304		89
Adjusted net income	$	77,638	$	39,396	$	130,101	$	71,138
Denominator:
Shares used in basic per share amounts:
Weighted average common shares outstanding	135,196		135,094		134,768		133,209
Shares used in diluted per share amounts:
Weighted average common shares outstanding	135,196		135,094		134,768		133,209
Effect of dilutive securities:
Employee stock-based awards	3,042		4,554		3,399		5,177
Notes due 2023	900		900		900		900
Notes due 2024	—		45		—		1,506
2024 Warrants	—		43		—		1,268
Notes due 2025	—		557		—		1,137
2025 Warrants	512		340		460		825
Notes due 2026	2,057		—		2,057		—
Notes due 2028	2,018		—		2,018		—
Weighted average common shares outstanding for diluted calculation	143,725		141,533		143,602		144,022
Basic and diluted net income per share
Net income per share, basic	$	0.57	$	0.29	$	0.96	$	0.53
Net income per share, diluted	$	0.54	$	0.28	$	0.91	$	0.49

For the three and six months ended June 30, 2022, the dilutive effect of potentially dilutive common shares is reflected in diluted earnings per share by application of the treasury stock method for stock options, RSUs, PSUs, the 2025 Warrants, the 2026 Warrants and the 2028 Warrants. To the extent these potential common shares are antidilutive, they are excluded from the calculation of diluted net income per share.

For the three and six months ended June 30, 2022, due to adoption of ASU 2020-06 on January 1, 2022, the Company is no longer utilizing the treasury stock method for earnings per share impact for the Notes due 2025, Notes due 2026 and Notes due 2028. Instead, the Company is applying the if-converted method when reporting the number of potentially dilutive shares of common stock as the Company may at its election, settle its Convertible Senior Notes through payment or delivery, as the case may be, in cash, shares of its common stock or a combination of cash and shares of its common stock. Under this method, diluted earnings per share is determined by assuming that all of the Convertible Senior Notes were converted into shares of the Company’s common stock at the beginning of the reporting period.

Further, the Company under the relevant sections of the indentures, irrevocably may elect to settle principal in cash and any excess in cash or shares of the Company’s common stock for its Notes due 2025, Notes due 2026 and Notes due 2028. If and when the Company makes such election, there will be no adjustment to the net income and the Company will use the average share price for the period to determine the potential number of shares to be issued based upon assumed conversion to be included in the diluted share count.

Diluted earnings per share for the three and six months ended June 30, 2021 includes the dilutive effect of stock options, RSUs, PSUs, shares to be purchased under the ESPP, the Notes due 2023, the Notes due 2024, the 2024 Warrants, the Notes due 2025 and the 2025 Warrants. Certain common stock issuable under stock options, RSUs, PSUs, the Notes due 2026, the 2026 Warrants, the Notes due 2028 and the 2028 Warrants have been omitted from the diluted net income per share calculation because including such shares would have been antidilutive.

The following outstanding shares of common stock equivalents were excluded from the calculation of the diluted net income per share attributable to common stockholders because their effect would have been antidilutive:

	Three Months Ended June 30,		Six Months Ended June 30,
	2022	2021	2022	2021
	(In thousands)
Employee stock-based awards	572	178	598	88
Notes due 2028	—	1,902	—	1,234
2028 Warrants	2,425	3,457	2,735	2,264
Notes due 2026	—	2,255	—	1,468
2026 Warrants	2,471	3,457	2,788	2,264
Notes due 2025	1,253	—	1,253	—
Total	6,721	11,249	7,374	7,318

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RELATED PARTY	6 Months Ended
	Jun. 30, 2022
Related Party Transactions [Abstract]
RELATED PARTY	RELATED PARTYIn 2018, a member of the Company’s board of directors and one of its principal stockholders, Thurman John Rodgers, purchased $5.0 million aggregate principal amount of the Notes due 2023 in a concurrent private placement. As of both June 30, 2022 and December 31, 2021, $5.0 million aggregate principal amount of the Notes due 2023 were outstanding. For additional information related to this purchase, see Note 9, “Debt,” for additional information related to this purchase.

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DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (Policies)

6 Months Ended

Jun. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation and Consolidation

Basis of Presentation and Consolidation

The accompanying condensed consolidated financial statements are presented in accordance with accounting principles generally accepted in the United States (“GAAP”). The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Significant estimates and assumptions reflected in the financial statements include revenue recognition, allowance for doubtful accounts, stock-based compensation, deferred compensation arrangements, inventory valuation, accrued warranty obligations, fair value of investments, debt derivatives, convertible notes and contingent consideration, fair value of acquired intangible assets and goodwill, useful lives of acquired intangible assets and property and equipment, incremental borrowing rate for right-of-use assets and lease liability. These estimates are based on information available as of the date of the financial statements; therefore, actual results could differ materially from those estimates due to risks and uncertainties, including uncertainty in the ongoing semiconductor supply and logistics constraints, and the continuing COVID-19 pandemic.

Recently Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements Not Yet Effective

Recently Adopted Accounting Pronouncements

In August 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-06, “Debt - Debt with Conversion and Other Options (subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (subtopic 815-40)” (“ASU 2020-06”), which reduces the number of accounting models in subtopic ASC 470-20 that require separate accounting for embedded conversion features. As a result, a convertible debt instrument will be accounted for as a single liability measured at its amortized cost as long as no other features require bifurcation and recognition as derivatives. By removing those separation models, the effective interest rate of convertible debt instruments will be closer to the coupon interest rate. Further, the diluted net income per share calculation for convertible instruments will require the Company to use the if-converted method. The treasury stock method should no longer be used to calculate diluted net income per share for convertible instruments.

The Company adopted ASU 2020-06 in the annual period beginning January 1, 2022, on a modified retrospective basis. Upon adoption of ASU 2020-06, the Company is no longer required to bifurcate the conversion feature related to the issuance of $575.0 million aggregate principal amount of its 0.0% convertible senior notes due 2028 (the “Notes due 2028”) and $632.5 million aggregate principal amount of its 0.0% convertible senior notes due 2026 (the “Notes due 2026”) in equity. Instead, the Company combined the previously separated equity component with the liability component, which together is now classified as debt, thereby eliminating the subsequent amortization of the debt discount. Similarly, the portion of issuance costs previously allocated to equity was reclassified to the carrying value of debt and amortized over the remaining terms of the convertible senior notes. Accordingly, the Company recorded a net decrease to additional paid-in capital by $207.9 million, net of tax to remove the equity component separately recorded for the conversion features associated with the convertible senior notes and equity component associated with the issuance costs, an increase to the carrying value of its convertible debt instrument by $244.5 million to reflect the full principal amount of the convertible senior notes outstanding net of issuance costs, a decrease to deferred tax liability of $62.3 million, and a decrease to accumulated deficit by $25.7 million, net of tax in the Company’s consolidated balance sheet with no impact on the Company’s consolidated statements of operations.

Also upon adoption of ASU 2020-06, the Company is no longer utilizing the treasury stock method for earnings per share impact for 0.25% convertible senior notes due 2025 (the “Notes due 2025”), the Notes due 2026 and the Notes due 2028 (together, the “Convertible Senior Notes”). Instead, the Company is applying the if-converted method when reporting the number of potentially dilutive shares of common stock as the Company may at its election, settle its Convertible Senior Notes through payment or delivery, as the case may be, in cash, shares of its common stock or a combination of cash and shares of its common stock. Further, the Company under the relevant sections of the indentures, irrevocably may elect to settle principal in cash and any excess in cash or shares of the Company’s common stock for its Convertible Senior Notes. If and when the Company makes such election, there will be no adjustment to the net income and the Company will use the average share price for the period to determine the potential number of shares to be issued based upon assumed conversion to be included in the diluted share count.

Recently Issued Accounting Pronouncements

Not Yet Effective

In October 2021, the FASB issued ASU 2021-08, "Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers" (“ASU 2021-08”). ASU 2021-08 requires an acquirer in a business combination to recognize and measure contract assets and contract liabilities acquired in a business combination in accordance with ASC 606, “Revenue from Contracts with Customers,” as if it had originated the contracts. ASU 2021-08 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022. Early adoption is permitted. The Company does not expect the adoption of ASU 2021-08 to have a significant impact on its condensed consolidated financial statements and plans to adopt the standard effective January 1, 2023.

Fair Value Measurement

The accounting guidance defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities recorded at fair value, the Company considers the principal or most advantageous market in which it would transact and considers assumptions that market participants would use when pricing the asset or liability, such as inherent risk, transfer restrictions, and risk of nonperformance.

The fair value hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. An asset’s or liability’s categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Three levels of inputs may be used to measure fair value:

•Level 1 - Valuations based on quoted prices in active markets for identical assets or liabilities that the Company is able to access. Since valuations are based on quoted prices that are readily and regularly available in an active market, valuation of such assets or liabilities do not entail a significant degree of judgment.

•Level 2 - Valuations based on one or more quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly.

•Level 3 - Valuations based on inputs that are unobservable and significant to the overall fair value measurement.

Earnings Per Share

Basic net income per share is computed by dividing net income by the weighted average number of shares of common stock outstanding during the period. Diluted net income per share is computed in a similar manner, but it also includes the effect of potential common shares outstanding during the period, when dilutive. Potential common shares include stock options, RSUs, PSUs, shares to be purchased under the Company’s 2011 Employee Stock Purchase Plan (the “ESPP”), the Notes due 2023, 1.0% convertible senior notes due 2024 (the “Notes due 2024”), Notes due 2025, Notes due 2026, Notes due 2028, and warrant transactions in connection with the offering of the Notes due 2024 (the “2024 Warrants”), 2025 Warrants, 2026 Warrants and the 2028 Warrants. See Note 9, “Debt,” for additional information about the Company’s outstanding notes.

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REVENUE RECOGNITION (Tables)

6 Months Ended

Jun. 30, 2022

Revenue from Contract with Customer [Abstract]

Summary of Revenue Disaggregation

Disaggregated revenue by primary geographical market and timing of revenue recognition for the Company’s single product line are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Primary geographical markets:
U.S.	$	422,628	$	254,576	$	792,120	$	502,358
International	107,568		61,481		179,368		115,453
Total	$	530,196	$	316,057	$	971,488	$	617,811
Timing of revenue recognition:
Products delivered at a point in time	$	511,865	$	302,100	$	936,014	$	590,971
Products and services delivered over time	18,331		13,957		35,474		26,840
Total	$	530,196	$	316,057	$	971,488	$	617,811

Summary of Contract Assets and Contract Liabilities, and Changes in Balances from Contracts with Customers

Receivables, and contract assets and contract liabilities from contracts with customers, are as follows:

	June 30, 2022		December 31, 2021
	(In thousands)
Receivables	$	312,451	$	333,626
Short-term contract assets (Prepaid expenses and other assets)	26,537		23,508
Long-term contract assets (Other assets)	78,139		69,583
Short-term contract liabilities (Deferred revenues, current)	74,067		62,670
Long-term contract liabilities (Deferred revenues, non-current)	217,095		187,186

Significant changes in the balances of contract assets (prepaid expenses and other assets) as of June 30, 2022 are as follows (in thousands):

Contract Assets
Contract Assets, beginning of period	$	93,091
Amount recognized	(13,156)
Increase	24,741
Contract Assets, end of period	$	104,676

Significant changes in the balances of contract liabilities (deferred revenues) as of June 30, 2022 are as follows (in thousands):

Contract Liabilities
Contract Liabilities, beginning of period	$	249,856
Revenue recognized	(35,474)
Increase due to billings	76,780
Contract Liabilities, end of period	$	291,162

Summary of Estimated Revenue Expected to be Recognized in Future Periods

Estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially unsatisfied at the end of the reporting period are as follows:

	June 30, 2022
	(In thousands)
Fiscal year:
2022 (remaining six months)	$	38,983
2023	68,667
2024	62,924
2025	55,770
2026	40,141
Thereafter	24,677
Total	$	291,162

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OTHER FINANCIAL INFORMATION (Tables)

6 Months Ended

Jun. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Inventory

Inventory consists of the following:

	June 30, 2022		December 31, 2021
	(In thousands)
Raw materials	$	25,559	$	25,429
Finished goods	104,707		48,971
Total inventory	$	130,266	$	74,400

Schedule of Accrued Liabilities

Accrued liabilities consist of the following:

	June 30, 2022		December 31, 2021
	(In thousands)
Salaries, commissions, incentive compensation and benefits	$	14,670	$	13,062
Customer rebates and sales incentives	116,647		79,038
Freight	17,788		20,522
Operating lease liabilities, current	3,804		3,830
Liability due to supply agreements	12,278		14,653
Contingent consideration	—		3,710
Post combination expense accrual	7,585		8,602
VAT payable	10,952		7,231
Other	14,195		7,264
Total accrued liabilities	$	197,919	$	157,912

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BUSINESS COMBINATION (Tables)

6 Months Ended

Jun. 30, 2022

Business Combination and Asset Acquisition [Abstract]

Summary of fair values of assets acquired and liabilities assumed

The following table summarizes the preliminary estimated fair values of the assets acquired and liabilities assumed at the acquisition date, which are subject to change within the measurement period as the fair value assessments are finalized (in thousands):

Cash and cash equivalents	$	1,426
Net tangible assets acquired	813
Intangible assets	11,200
Goodwill	12,612
Net assets acquired	$	26,051

Summary of intangible assets acquired

The following table shows the fair value of the separately identifiable intangible assets at the time of acquisition and the period over which each intangible asset will be amortized:

	Preliminary Fair Value		Useful Life
	(In thousands)		(Years)
Developed technology	$	3,600	5
Customer relationships	7,600		5
Total identifiable intangible assets	$	11,200

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GOODWILL AND INTANGIBLE ASSETS (Tables)

6 Months Ended

Jun. 30, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The Company’s goodwill as of June 30, 2022 and December 31, 2021 are as follows:

Goodwill	June 30, 2022		December 31, 2021
	(In thousands)
Goodwill, beginning of period	$	181,254	$	24,783
Goodwill acquired	16,378		156,390
Currency translation adjustment	(628)		81
Goodwill, end of period	$	197,004	$	181,254

Schedule of Acquired Indefinite-lived Intangible Assets by Major Class

The Company’s purchased intangible assets as of June 30, 2022 and December 31, 2021 are as follows:

	June 30, 2022								December 31, 2021
	Gross		Additions		Accumulated Amortization		Net		Gross		Additions		Accumulated Amortization		Net
	(In thousands)
Intangible assets:
Other indefinite-lived intangibles	$	286	$	—	$	—	$	286	$	286	$	—	$	—	$	286
Intangible assets with finite lives:
Developed technology	38,650		3,600		(12,834)		29,416		13,100		25,550		(8,958)		29,692
Customer relationships	41,021		7,600		(15,273)		33,348		26,421		14,600		(11,448)		29,573
Trade names	37,700		—		(3,863)		33,837		—		37,700		(93)		37,607
Order backlog	600		—		(600)		—		—		600		—		600
Total purchased intangible assets	$	118,257	$	11,200	$	(32,570)	$	96,887	$	39,807	$	78,450	$	(20,499)	$	97,758

Schedule of Acquired Finite-Lived Intangible Assets by Major Class

The Company’s purchased intangible assets as of June 30, 2022 and December 31, 2021 are as follows:

	June 30, 2022								December 31, 2021
	Gross		Additions		Accumulated Amortization		Net		Gross		Additions		Accumulated Amortization		Net
	(In thousands)
Intangible assets:
Other indefinite-lived intangibles	$	286	$	—	$	—	$	286	$	286	$	—	$	—	$	286
Intangible assets with finite lives:
Developed technology	38,650		3,600		(12,834)		29,416		13,100		25,550		(8,958)		29,692
Customer relationships	41,021		7,600		(15,273)		33,348		26,421		14,600		(11,448)		29,573
Trade names	37,700		—		(3,863)		33,837		—		37,700		(93)		37,607
Order backlog	600		—		(600)		—		—		600		—		600
Total purchased intangible assets	$	118,257	$	11,200	$	(32,570)	$	96,887	$	39,807	$	78,450	$	(20,499)	$	97,758

Schedule of Amortization Expense

Amortization expense related to finite-lived intangible assets are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Developed technology	$	2,010	$	891	$	3,876	$	1,690
Customer relationships	2,067		1,532		3,825		2,462
Trade names	1,885		85		3,770		147
Order backlog	323		—		600		—
Total amortization expense	$	6,285	$	2,508	$	12,071	$	4,299

The expected future amortization expense of intangible assets as of June 30, 2022 is presented below (in thousands):

	June 30, 2022
Fiscal year:
2022 (remaining six months)	$	11,926
2023	24,096
2024	21,299
2025	19,984
2026	16,425
Thereafter	2,871
Total	$	96,601

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CASH EQUIVALENTS AND MARKETABLE SECURITIES (Tables)

6 Months Ended

Jun. 30, 2022

Cash and Cash Equivalents [Abstract]

Debt Securities, Available-for-sale

The cash equivalents and marketable securities consist of the following:

	As of June 30, 2022
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Cash Equivalents		Marketable Securities
	(In thousands)
Money market funds	$	432,946	$	—	$	—	$	432,946	$	432,946	$	—
Certificates of Deposit	3,126		—		(24)		3,102		—		3,102
Commercial paper	121,294		—		(224)		121,070		—		121,070
Corporate notes and bonds	144,438		1		(3,189)		141,250		—		141,250
U.S. Treasuries	39,551		1		(8)		39,544		—		39,544
U.S. Government agency securities	456,128		—		(8,766)		447,362		—		447,362
Total	$	1,197,483	$	2	$	(12,211)	$	1,185,274	$	432,946	$	752,328

	As of December 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Cash Equivalents		Marketable Securities
	(In thousands)
Money market funds	$	35,789	$	—	$	—	$	35,789	$	35,789	$	—
Certificates of Deposit	16,001		—		(2)		15,999		6,000		9,999
Commercial paper	215,964		—		(114)		215,850		26,997		188,853
Corporate notes and bonds	199,244		—		(872)		198,372		760		197,612
U.S. Treasuries	14,999		—		(1)		14,998		—		14,998
U.S. Government agency securities	487,743		—		(1,870)		485,873		—		485,873
Total	$	969,740	$	—	$	(2,859)	$	966,881	$	69,546	$	897,335

Investments Classified by Contractual Maturity Date

The following table summarizes the contractual maturities of the Company’s cash equivalents and marketable securities as of June 30, 2022:

	Amortized Cost		Fair Value
	(In thousands)
Due within one year	$	1,023,275	$	1,017,129
Due within one to three years	174,208		168,145
Total	$	1,197,483	$	1,185,274

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WARRANTY OBLIGATIONS (Tables)

6 Months Ended

Jun. 30, 2022

Product Warranties Disclosures [Abstract]

Summary of Warranty Activities

The Company’s warranty activities were as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Warranty obligations, beginning of period	$	83,579	$	54,553	$	73,377	$	45,913
Accruals for warranties issued during period	11,311		3,319		20,221		7,213
Changes in estimates	17,063		4,269		21,975		11,924
Settlements	(6,590)		(2,757)		(12,471)		(5,687)
Increase due to accretion expense	1,828		1,104		3,343		2,047
Other	(10,641)		(550)		(9,895)		(1,472)
Warranty obligations, end of period	96,551		59,938		96,551		59,938
Less: current portion	(29,197)		(15,009)		(29,197)		(15,009)
Non-current	$	67,354	$	44,929	$	67,354	$	44,929

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FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Jun. 30, 2022

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table presents assets and liabilities measured at fair value on a recurring basis using the above input categories:

	June 30, 2022						December 31, 2021
	(In thousands)
	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents:
Money market funds	$	432,946	$	—	$	—	$	35,789	$	—	$	—
Certificates of deposit	—		—		—		—		6,000		—
Commercial paper	—		—		—		—		26,997		—
Corporate notes and bonds	—		—		—		—		760		—
Marketable securities:
Certificates of deposit	—		3,102		—		—		9,999		—
Commercial paper	—		121,070		—		—		188,853		—
Corporate notes and bonds	—		141,250		—		—		197,612		—
U.S. Government agencies	—		447,362		—		—		485,873		—
U.S. Treasuries	—		39,544		—		—		14,998		—
Other assets
Investments in debt securities	—		—		40,913		—		—		41,042
Total assets measured at fair value	$	432,946	$	752,328	$	40,913	$	35,789	$	931,092	$	41,042
Liabilities:
Accrued liabilities
Contingent consideration	$	—	$	—	$	—	$	—	$	—	$	3,710
Warranty obligations
Current	—		—		24,772		—		—		14,612
Non-current	—		—		49,151		—		—		36,395
Total warranty obligations measured at fair value	—		—		73,923		—		—		51,007
Total liabilities measured at fair value	$	—	$	—	$	73,923	$	—	$	—	$	54,717

Summary of Significant Unobservable Inputs used in the Fair Value Measurement of Assets Designated as Level 3

The changes in the balance in investments in debt securities during the period are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Balance at beginning of period	$	39,926	$	26,437	$	41,042	$	—
Investment	—		20,000		—		45,000
Fair value adjustments included in other (expense) income, net	987		932		(129)		2,369
Balance at end of period	$	40,913	$	47,369	$	40,913	$	47,369

Schedule of Changes in Nonfinancial Liabilities Related to Warrant Obligations Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs

The following table reflects the activity for the Company’s contingent consideration liabilities measured at fair value using Level 3 inputs for the six months ended June 30, 2022:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Balance at beginning of period	$	—	$	3,540	$	3,710	$	—
Addition	—		—		—		3,500
Fair value adjustments included in other income (expense), net	—		56		15		96
Paid	—		—		(3,725)		—
Balance at end of period	$	—	$	3,596	$	—	$	3,596

The following table provides information regarding changes in nonfinancial liabilities related to the Company’s warranty obligations measured at fair value on a recurring basis using significant unobservable inputs designated as Level 3 for the periods indicated:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Balance at beginning of period	$	61,586	$	33,319	$	51,007	$	28,736
Accruals for warranties issued during period	11,120		3,319		19,890		7,213
Changes in estimates	14,692		2,755		18,591		5,338
Settlements	(4,668)		(1,910)		(8,724)		(3,825)
Increase due to accretion expense	1,828		1,104		3,343		2,047
Other	(10,636)		(550)		(10,185)		(1,472)
Balance at end of period	$	73,923	$	38,037	$	73,923	$	38,037

Summary of Significant Unobservable Inputs used in the Fair Value Measurement of Liabilities Designated as Level 3

As of June 30, 2022 and December 31, 2021, the significant unobservable inputs used in the fair value measurement of the Company’s liabilities designated as Level 3 are as follows, of which the monetary impact for change in discount rate is captured in “Other” in the table above:

			Percent Used (Weighted Average)
Item Measured at Fair Value	Valuation Technique	Description of Significant Unobservable Input	June 30, 2022	December 31, 2021
Warranty obligations for products sold since January 1, 2014	Discounted cash flows	Profit element and risk premium	16%	15%
		Credit-adjusted risk-free rate	16%	12%

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DEBT (Tables)

6 Months Ended

Jun. 30, 2022

Debt Disclosure [Abstract]

Schedule of Debt

The following table provides information regarding the Company’s debt:

	June 30, 2022		December 31, 2021
	(In thousands)
Convertible notes
Notes due 2028	$	575,000	$	575,000
Less: unamortized debt discount	—		(143,636)
Less: unamortized debt issuance costs	(7,359)		(5,775)
Carrying amount of Notes due 2028 (1)	567,641		425,589
Notes due 2026	632,500		632,500
Less: unamortized debt discount	—		(104,755)
Less: unamortized debt issuance costs	(7,312)		(6,678)
Carrying amount of Notes due 2026 (1)	625,188		521,067
Notes due 2025	102,175		102,175
Less: unamortized debt discount	(12,447)		(14,584)
Less: unamortized debt issuance costs	(1,299)		(1,539)
Carrying amount of Notes due 2025	88,429		86,052
Notes due 2023	5,000		5,000
Less: unamortized issuance costs	(43)		(62)
Carrying amount of Notes due 2023	4,957		4,938
Total carrying amount of debt	1,286,215		1,037,646
Less: current portion of convertible notes	(88,429)		(86,052)
Debt, non-current	$	1,197,786	$	951,594

(1)    The net carrying amount was increased on January 1, 2022 as a result of the adoption of ASU 2020-06. Refer to Note 2, Summary of Significant Accounting Policies, in this Quarterly Report on Form 10-Q for further information.

The following table presents the total amount of interest cost recognized in the statement of operations relating to the Notes due 2028:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Amortization of debt discount	$	—	$	4,872	$	—	$	6,483
Amortization of debt issuance costs	327		236		643		315
Total interest cost recognized	$	327	$	5,108	$	643	$	6,798

The following table presents the total amount of interest cost recognized in the statement of operations relating to the Notes due 2026:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Amortization of debt discount	$	—	$	5,587	$	—	$	7,373
Amortization of debt issuance costs	502		404		987		539
Total interest cost recognized	$	502	$	5,991	$	987	$	7,912

The following table presents the total amount of interest cost recognized relating to the Notes due 2025:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Contractual interest expense	$	64	$	64	$	128	$	214
Amortization of debt discount	1,088		1,033		2,137		3,422
Amortization of debt issuance costs	123		122		241		416
Total interest cost recognized	$	1,275	$	1,219	$	2,506	$	4,052

The following table presents the amount of interest cost recognized relating to the contractual interest coupon and the amortization of debt issuance costs of the Notes due 2023:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Contractual interest expense	$	50	$	50	$	100	$	100
Amortization of debt issuance costs	10		10		20		20
Total interest costs recognized	$	60	$	60	$	120	$	120

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COMMITMENTS AND CONTINGENCIES (Tables)

6 Months Ended

Jun. 30, 2022

Commitments and Contingencies Disclosure [Abstract]

Components of Lease

The components of lease expense are presented as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Operating lease costs	$	2,052	$	1,815	$	3,989	$	3,446

The components of lease liabilities are presented as follows:

	June 30, 2022		December 31, 2021
	(In thousands except years and percentage data)
Operating lease liabilities, current (Accrued liabilities)	$	3,804	$	3,830
Operating lease liabilities, non-current (Other liabilities)	16,181		11,920
Total operating lease liabilities	$	19,985	$	15,750
Supplemental lease information:
Weighted average remaining lease term	5.8 years		5.9 years
Weighted average discount rate	6.3%		7.4%

Supplemental cash flow and other information related to operating leases, are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	1,325	$	1,425	$	2,843	$	2,786
Non-cash investing activities:
Lease liabilities arising from obtaining right-of-use assets	$	—	$	—	$	6,742	$	—

Schedule of Future Minimum Rental Payments for Operating Leases

Undiscounted cash flows of operating lease liabilities as of June 30, 2022 are as follows:

	Lease Amounts
	(In thousands)
Year:
2022 (remaining six months)	$	2,417
2023	5,141
2024	4,281
2025	3,577
2026	2,618
Thereafter	5,825
Total lease payments	23,859
Less: imputed lease interest	(3,874)
Total lease liabilities	$	19,985

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STOCK-BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2022

Share-Based Payment Arrangement [Abstract]

Summary of the Components of Total Stock-Based Compensation Expense

The following table summarizes the components of total stock-based compensation expense included in the condensed consolidated statements of operations for the periods presented:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Cost of revenues	$	3,131	$	1,060	$	5,638	$	2,042
Research and development	16,266		5,467		29,995		11,216
Sales and marketing	22,176		5,335		35,233		8,872
General and administrative	11,491		3,450		29,995		8,026
Total	$	53,064	$	15,312	$	100,861	$	30,156

Summary of Stock-Based Compensation Associated with Each Type of Award

The following table summarizes the various types of stock-based compensation expense for the periods presented:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands)
Stock options, RSUs and PSUs	$	47,228	$	14,361	$	91,340	$	28,201
Employee stock purchase plan	1,014		951		2,396		1,955
Post combination expense accrual (Accrued liabilities)	4,822		—		7,125		—
Total	$	53,064	$	15,312	$	100,861	$	30,156

Summary of Stock Option Activity

The following table summarizes stock option activity:

	Number of Shares Outstanding	Weighted- Average Exercise Price per Share		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value (1)
	(In thousands)			(Years)	(In thousands)
Outstanding at December 31, 2021	2,264	$	1.90
Granted	—	—
Exercised	(360)	1.74			$	65,153
Canceled	(1)	8.82
Outstanding at June 30, 2022	1,903	$	1.93	2.4	$	367,918
Vested and expected to vest at June 30, 2022	1,903	$	1.93	2.4	$	367,918
Exercisable at June 30, 2022	1,903	$	1.93	2.4	$	367,918

(1)    The intrinsic value of options exercised is based upon the value of the Company’s stock at exercise. The intrinsic value of options outstanding, vested and expected to vest, and exercisable as of June 30, 2022 is based on the closing price of the last trading day during the period ended June 30, 2022. The Company’s stock fair value used in this computation was $195.24 per share.

Summary of Stock Option Outstanding

The following table summarizes information about stock options outstanding at June 30, 2022:

	Options Outstanding				Options Exercisable
Range of Exercise Prices	Number of Shares	Weighted- Average Remaining Life	Weighted- Average Exercise Price		Number of Shares	Weighted- Average Exercise Price
	(In thousands)	(Years)			(In thousands)
$0.70 —– $1.11	479	2.8	$	0.80	479	$	0.80
$1.29 —– $1.29	1,000	2.2	1.29		1,000	1.29
$1.31 —– $5.53	380	2.0	2.15		380	2.15
$14.58 —– $14.58	33	3.8	14.58		33	14.58
$64.17 —– $64.17	11	4.8	64.17		11	64.17
Total	1,903	2.4	$	1.93	1,903	$	1.93

Summary of Restricted Stock Unit Activity

The following table summarizes RSU activity:

	Number of Shares Outstanding	Weighted- Average Fair Value per Share at Grant Date		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value (1)
	(In thousands)			(Years)	(In thousands)
Outstanding at December 31, 2021	2,786	$	100.73
Granted	561	175.97
Vested	(916)	67.21			$	151,219
Canceled	(113)	139.67
Outstanding at June 30, 2022	2,318	130.32		1.2	$	452,664
Expected to vest at June 30, 2022	2,318	$	130.32	1.2	$	452,556

(1)    The intrinsic value of RSUs vested is based upon the value of the Company’s stock when vested. The intrinsic value of RSUs outstanding and expected to vest as of June 30, 2022 is based on the closing price of the last trading day during the period ended June 30, 2022. The Company’s stock fair value used in this computation was $195.24 per share.

Share-based Compensation, Performance Shares Award Outstanding Activity

The following summarizes PSU activity:

	Number of Shares Outstanding	Weighted- Average Fair Value per Share at Grant Date		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value (1)
	(In thousands)			(Years)	(In thousands)
Outstanding at December 31, 2021	445	$	169.82
Granted	392	192.72
Vested	(303)	168.88			$	51,393
Canceled	(176)	170.96
Outstanding at June 30, 2022	358	$	195.14	0.7	$	69,900
Expected to vest at June 30, 2022	358	$	195.14	0.7	$	69,900

(1)    The intrinsic value of PSUs vested is based upon the value of the Company’s stock when vested. The intrinsic value of PSUs outstanding and expected to vest as of June 30, 2022 is based on the closing price of the last trading day during the period ended June 30, 2022. The Company’s stock fair value used in this computation was $195.24 per share.

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NET INCOME PER SHARE (Tables)

6 Months Ended

Jun. 30, 2022

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted Net Income (Loss) Per Share

The following table presents the computation of basic and diluted net income per share for the periods presented:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(In thousands, except per share data)
Numerator:
Net income	$	76,976	$	39,351	$	128,797	$	71,049
Convertible Senior Notes interest and financing costs, net	662		45		1,304		89
Adjusted net income	$	77,638	$	39,396	$	130,101	$	71,138
Denominator:
Shares used in basic per share amounts:
Weighted average common shares outstanding	135,196		135,094		134,768		133,209
Shares used in diluted per share amounts:
Weighted average common shares outstanding	135,196		135,094		134,768		133,209
Effect of dilutive securities:
Employee stock-based awards	3,042		4,554		3,399		5,177
Notes due 2023	900		900		900		900
Notes due 2024	—		45		—		1,506
2024 Warrants	—		43		—		1,268
Notes due 2025	—		557		—		1,137
2025 Warrants	512		340		460		825
Notes due 2026	2,057		—		2,057		—
Notes due 2028	2,018		—		2,018		—
Weighted average common shares outstanding for diluted calculation	143,725		141,533		143,602		144,022
Basic and diluted net income per share
Net income per share, basic	$	0.57	$	0.29	$	0.96	$	0.53
Net income per share, diluted	$	0.54	$	0.28	$	0.91	$	0.49

Schedule of Potentially Dilutive Securities Excluded from the Computation of Diluted Net Income (Loss) Per Share

The following outstanding shares of common stock equivalents were excluded from the calculation of the diluted net income per share attributable to common stockholders because their effect would have been antidilutive:

	Three Months Ended June 30,		Six Months Ended June 30,
	2022	2021	2022	2021
	(In thousands)
Employee stock-based awards	572	178	598	88
Notes due 2028	—	1,902	—	1,234
2028 Warrants	2,425	3,457	2,735	2,264
Notes due 2026	—	2,255	—	1,468
2026 Warrants	2,471	3,457	2,788	2,264
Notes due 2025	1,253	—	1,253	—
Total	6,721	11,249	7,374	7,318

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DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (Details) - USD ($)	Jun. 30, 2022	Jan. 01, 2022	Dec. 31, 2021	Mar. 12, 2021	Mar. 01, 2021	Mar. 09, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Additional paid in capital	$ (713,473,000)		$ (837,924,000)
Accumulated deficit	$ 251,230,000		$ 405,737,000
Notes due 2028 | Convertible Notes
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt instrument face amount					$ 575,000,000
Interest rate					0.00%
Total Convertible Senior Notes Due 2026 | Convertible Notes
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt instrument face amount				$ 632,500,000
Interest rate					0.00%
Notes due 2025 | Convertible Notes
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt instrument face amount						$ 320,000,000
Interest rate	1.00%					0.25%
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Additional paid in capital		$ 207,900,000
Convertible debt		244,500,000
Deferred income tax liabilities		62,300,000
Accumulated deficit		25,700,000
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06 | Notes due 2028
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Additional paid in capital		117,300,000
Convertible debt		141,300,000
Deferred income tax liabilities		36,000,000
Accumulated deficit		$ 12,000,000

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REVENUE RECOGNITION - Summary of Disaggregated Revenue by Primary Geographical Market and Timing of Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Net revenues	$ 530,196	$ 316,057	$ 971,488	$ 617,811
Products delivered at a point in time
Disaggregation of Revenue [Line Items]
Net revenues	511,865	302,100	936,014	590,971
Products and services delivered over time
Disaggregation of Revenue [Line Items]
Net revenues	18,331	13,957	35,474	26,840
U.S.
Disaggregation of Revenue [Line Items]
Net revenues	422,628	254,576	792,120	502,358
International
Disaggregation of Revenue [Line Items]
Net revenues	$ 107,568	$ 61,481	$ 179,368	$ 115,453

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REVENUE RECOGNITION - Summary of Contract Assets and Contract Liabilities from Contracts with Customers (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Receivables	$ 312,451	$ 333,626
Short-term contract assets (Prepaid expenses and other assets)	26,537	23,508
Long-term contract assets (Other assets)	78,139	69,583
Short-term contract liabilities (Deferred revenues, current)	74,067	62,670
Long-term contract liabilities (Deferred revenues, non-current)	$ 217,095	$ 187,186

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REVENUE RECOGNITION - Narrative (Details)	6 Months Ended
	Jun. 30, 2022 USD ($)
Revenue from Contract with Customer [Abstract]
Contract asset impairment charges	$ 0

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REVENUE RECOGNITION - Summary of Significant Changes in the Balances of Contract Liabilities and Assets (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
Contract Assets
Balance, beginning of period	$ 93,091
Amount recognized	(13,156)
Increase	24,741
Balance, end of period	104,676
Contract Liabilities
Balance, beginning of period	249,856
Revenue recognized	(35,474)
Increase due to billings	76,780
Balance, end of period	$ 291,162

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REVENUE RECOGNITION - Summary of Estimated Revenue Expected to be Recognized in Future Periods (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Revenue from Contract with Customer [Abstract]
Total estimated revenue expected to be recognized in future periods	$ 291,162
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Revenue from Contract with Customer [Abstract]
Total estimated revenue expected to be recognized in future periods	$ 38,983
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total estimated revenue expected to be recognized in future periods, expected timing	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue from Contract with Customer [Abstract]
Total estimated revenue expected to be recognized in future periods	$ 68,667
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total estimated revenue expected to be recognized in future periods, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue from Contract with Customer [Abstract]
Total estimated revenue expected to be recognized in future periods	$ 62,924
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total estimated revenue expected to be recognized in future periods, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue from Contract with Customer [Abstract]
Total estimated revenue expected to be recognized in future periods	$ 55,770
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total estimated revenue expected to be recognized in future periods, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue from Contract with Customer [Abstract]
Total estimated revenue expected to be recognized in future periods	$ 40,141
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total estimated revenue expected to be recognized in future periods, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue from Contract with Customer [Abstract]
Total estimated revenue expected to be recognized in future periods	$ 24,677
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total estimated revenue expected to be recognized in future periods, expected timing

XML

OTHER FINANCIAL INFORMATION - Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Raw materials	$ 25,559	$ 25,429
Finished goods	104,707	48,971
Total inventory	$ 130,266	$ 74,400

XML

OTHER FINANCIAL INFORMATION - Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Salaries, commissions, incentive compensation and benefits	$ 14,670	$ 13,062
Customer rebates and sales incentives	116,647	79,038
Freight	17,788	20,522
Operating lease liabilities, current	3,804	3,830
Liability due to supply agreements	12,278	14,653
Contingent consideration	0	3,710
Post combination expense accrual	7,585	8,602
VAT payable	10,952	7,231
Other	14,195	7,264
Total accrued liabilities	$ 197,919	$ 157,912

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BUSINESS COMBINATIONS - Narrative (Details) - SolarLeadFactory - USD ($) $ in Millions		6 Months Ended
	Mar. 14, 2022	Jun. 30, 2022
Business Acquisition [Line Items]
Voting interests acquired	100.00%
Purchase price	$ 26.1
Contingency payable, maximum	$ 10.0
Acquisition costs		$ 0.4

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BUSINESS COMBINATIONS - Summary of Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 14, 2022	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Goodwill	$ 197,004		$ 181,254	$ 24,783
SolarLeadFactory
Business Acquisition [Line Items]
Cash and cash equivalents		$ 1,426
Net tangible assets acquired		813
Intangible assets		11,200
Goodwill		12,612
Net assets acquired		$ 26,051

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BUSINESS COMBINATIONS - Summary of Identifiable Intangible Assets Acquired (Details) - SolarLeadFactory $ in Thousands	Mar. 14, 2022 USD ($)
Business Acquisition [Line Items]
Intangible assets	$ 11,200
Developed technology
Business Acquisition [Line Items]
Intangible assets	$ 3,600
Useful Life	5 years
Customer relationship
Business Acquisition [Line Items]
Intangible assets	$ 7,600
Useful Life	5 years

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GOODWILL AND INTANGIBLE ASSETS - Schedule of Goodwill (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Goodwill [Roll Forward]
Beginning balance	$ 181,254	$ 24,783
Goodwill acquired	16,378	156,390
Currency translation adjustment	(628)	81
Ending balance	$ 197,004	$ 181,254

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GOODWILL AND INTANGIBLE ASSETS - Schedule of Acquired Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Other indefinite-lived intangibles	$ 286	$ 286
Intangible assets with finite lives:
Additions	11,200	78,450
Accumulated Amortization	(32,570)	(20,499)
Net	96,601
Total purchased intangible assets, Gross	118,257	39,807
Total purchased intangible assets, Net	96,887	97,758
Developed technology
Intangible assets with finite lives:
Gross	38,650	13,100
Additions	3,600	25,550
Accumulated Amortization	(12,834)	(8,958)
Net	29,416	29,692
Customer relationship
Intangible assets with finite lives:
Gross	41,021	26,421
Additions	7,600	14,600
Accumulated Amortization	(15,273)	(11,448)
Net	33,348	29,573
Trade names
Intangible assets with finite lives:
Gross	37,700	0
Additions	0	37,700
Accumulated Amortization	(3,863)	(93)
Net	33,837	37,607
Order backlog
Intangible assets with finite lives:
Gross	600	0
Additions	0	600
Accumulated Amortization	(600)	0
Net	$ 0	$ 600

XML

GOODWILL AND INTANGIBLE ASSETS - Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 6,285	$ 2,508	$ 12,071	$ 4,299
Developed technology
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	2,010	891	3,876	1,690
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	2,067	1,532	3,825	2,462
Trade names
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	1,885	85	3,770	147
Order backlog
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 323	$ 0	$ 600	$ 0

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GOODWILL AND INTANGIBLE ASSETS - Expected Future Amortization Expense (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2022 (remaining six months)	$ 11,926
2023	24,096
2024	21,299
2025	19,984
2026	16,425
Thereafter	2,871
Total	$ 96,601

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CASH EQUIVALENTS AND MARKETABLE SECURITIES - Schedule of Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,197,483	$ 969,740
Gross Unrealized Gains	2	0
Gross Unrealized Losses	(12,211)	(2,859)
Fair Value	1,185,274	966,881
Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Fair Value	432,946	69,546
Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	752,328	897,335
Money market funds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	432,946	35,789
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	432,946	35,789
Money market funds | Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Fair Value	432,946	35,789
Money market funds | Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	0
Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,126	16,001
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(24)	(2)
Fair Value	3,102	15,999
Certificates of deposit | Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	6,000
Certificates of deposit | Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	3,102	9,999
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	121,294	215,964
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(224)	(114)
Fair Value	121,070	215,850
Commercial paper | Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	26,997
Commercial paper | Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	121,070	188,853
Corporate notes and bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	144,438	199,244
Gross Unrealized Gains	1	0
Gross Unrealized Losses	(3,189)	(872)
Fair Value	141,250	198,372
Corporate notes and bonds | Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	760
Corporate notes and bonds | Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	141,250	197,612
U.S. Treasuries
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	39,551	14,999
Gross Unrealized Gains	1	0
Gross Unrealized Losses	(8)	(1)
Fair Value	39,544	14,998
U.S. Treasuries | Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	0
U.S. Treasuries | Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	39,544	14,998
U.S. Government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	456,128	487,743
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(8,766)	(1,870)
Fair Value	447,362	485,873
U.S. Government agencies | Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	0
U.S. Government agencies | Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 447,362	$ 485,873

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CASH EQUIVALENTS AND MARKETABLE SECURITIES - Schedule of Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Cash and Cash Equivalents [Abstract]
Contractual maturities, Due within one year, Amortized Cost	$ 1,023,275
Contractual maturities, Due within one year, Fair Value	1,017,129
Contractual maturities, Due within one to three years, Amortized Cost	174,208
Contractual maturities, Due within one to three years, Fair Value	168,145
Amortized Cost	1,197,483	$ 969,740
Fair Value	$ 1,185,274	$ 966,881

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WARRANTY OBLIGATIONS - Summary of Warranty Activities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Changes in the Company's product warranty liability
Warranty obligations, beginning of period	$ 83,579	$ 54,553	$ 73,377	$ 45,913
Accruals for warranties issued during period	11,311	3,319	20,221	7,213
Changes in estimates	17,063	4,269	21,975	11,924
Settlements	(6,590)	(2,757)	(12,471)	(5,687)
Increase due to accretion expense	1,828	1,104	3,343	2,047
Other	(10,641)	(550)	(9,895)	(1,472)
Warranty obligations, end of period	96,551	59,938	96,551	59,938
Less: current portion	(29,197)	(15,009)	(29,197)	(15,009)	$ (19,395)
Non-current	$ 67,354	$ 44,929	$ 67,354	$ 44,929	$ 53,982

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WARRANTY OBLIGATIONS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Product Warranty Liability [Line Items]
Additional warranty expense	$ 17,063	$ 4,269	$ 21,975	$ 11,924
Failure Rate For Battery Storage
Product Warranty Liability [Line Items]
Additional warranty expense	13,300		13,300
Expedited Freight Costs And Replacement Costs
Product Warranty Liability [Line Items]
Additional warranty expense			4,900
Labor Reimbursement Rate
Product Warranty Liability [Line Items]
Additional warranty expense	$ 3,800		$ 3,800
Timing Related To Cost Reduction Assumptions For Replacement Products
Product Warranty Liability [Line Items]
Additional warranty expense		2,900		2,900
Field Performance Data And Diagnostic Root-Cause Failure Analysis
Product Warranty Liability [Line Items]
Additional warranty expense		$ 1,400		7,700
Other Cost Assumption Changes
Product Warranty Liability [Line Items]
Additional warranty expense				$ 1,300

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FAIR VALUE MEASUREMENTS - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Assets [Abstract]
Marketable securities:	$ 1,185,274	$ 966,881
Liabilities:
Contingent consideration	0	3,710
Certificates of deposit
Assets [Abstract]
Marketable securities:	3,102	15,999
Commercial paper
Assets [Abstract]
Marketable securities:	121,070	215,850
Corporate notes and bonds
Assets [Abstract]
Marketable securities:	141,250	198,372
U.S. Government agencies
Assets [Abstract]
Marketable securities:	447,362	485,873
U.S. Treasuries
Assets [Abstract]
Marketable securities:	39,544	14,998
Recurring | Level 1
Assets [Abstract]
Investments in debt securities	0	0
Total assets measured at fair value	432,946	35,789
Liabilities:
Contingent consideration	0	0
Warranty obligations
Current	0	0
Non-current	0	0
Total warranty obligations measured at fair value	0	0
Total liabilities measured at fair value	0	0
Recurring | Level 1 | Certificates of deposit
Assets [Abstract]
Marketable securities:	0	0
Recurring | Level 1 | Commercial paper
Assets [Abstract]
Marketable securities:	0	0
Recurring | Level 1 | Corporate notes and bonds
Assets [Abstract]
Marketable securities:	0	0
Recurring | Level 1 | U.S. Government agencies
Assets [Abstract]
Marketable securities:	0	0
Recurring | Level 1 | U.S. Treasuries
Assets [Abstract]
Marketable securities:	0	0
Recurring | Level 1 | Money market funds
Assets [Abstract]
Cash and cash equivalents	432,946	35,789
Recurring | Level 1 | Certificates of deposit
Assets [Abstract]
Cash and cash equivalents	0	0
Recurring | Level 1 | Commercial paper
Assets [Abstract]
Cash and cash equivalents	0	0
Recurring | Level 1 | Corporate notes and bonds
Assets [Abstract]
Cash and cash equivalents	0	0
Recurring | Level 2
Assets [Abstract]
Investments in debt securities	0	0
Total assets measured at fair value	752,328	931,092
Liabilities:
Contingent consideration	0	0
Warranty obligations
Current	0	0
Non-current	0	0
Total warranty obligations measured at fair value	0	0
Total liabilities measured at fair value	0	0
Recurring | Level 2 | Certificates of deposit
Assets [Abstract]
Marketable securities:	3,102	9,999
Recurring | Level 2 | Commercial paper
Assets [Abstract]
Marketable securities:	121,070	188,853
Recurring | Level 2 | Corporate notes and bonds
Assets [Abstract]
Marketable securities:	141,250	197,612
Recurring | Level 2 | U.S. Government agencies
Assets [Abstract]
Marketable securities:	447,362	485,873
Recurring | Level 2 | U.S. Treasuries
Assets [Abstract]
Marketable securities:	39,544	14,998
Recurring | Level 2 | Money market funds
Assets [Abstract]
Cash and cash equivalents	0	0
Recurring | Level 2 | Certificates of deposit
Assets [Abstract]
Cash and cash equivalents	0	6,000
Recurring | Level 2 | Commercial paper
Assets [Abstract]
Cash and cash equivalents	0	26,997
Recurring | Level 2 | Corporate notes and bonds
Assets [Abstract]
Cash and cash equivalents	0	760
Recurring | Level 3
Assets [Abstract]
Investments in debt securities	40,913	41,042
Total assets measured at fair value	40,913	41,042
Liabilities:
Contingent consideration	0	3,710
Warranty obligations
Current	24,772	14,612
Non-current	49,151	36,395
Total warranty obligations measured at fair value	73,923	51,007
Total liabilities measured at fair value	73,923	54,717
Recurring | Level 3 | Certificates of deposit
Assets [Abstract]
Marketable securities:	0	0
Recurring | Level 3 | Commercial paper
Assets [Abstract]
Marketable securities:	0	0
Recurring | Level 3 | Corporate notes and bonds
Assets [Abstract]
Marketable securities:	0	0
Recurring | Level 3 | U.S. Government agencies
Assets [Abstract]
Marketable securities:	0	0
Recurring | Level 3 | U.S. Treasuries
Assets [Abstract]
Marketable securities:	0	0
Recurring | Level 3 | Money market funds
Assets [Abstract]
Cash and cash equivalents	0	0
Recurring | Level 3 | Certificates of deposit
Assets [Abstract]
Cash and cash equivalents	0	0
Recurring | Level 3 | Commercial paper
Assets [Abstract]
Cash and cash equivalents	0	0
Recurring | Level 3 | Corporate notes and bonds
Assets [Abstract]
Cash and cash equivalents	$ 0	$ 0

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FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jan. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Increase in liability as a result of increasing the profit element and risk premium input by 100 basis points	$ 600
Decrease in liability as a result of decreasing the profit element and risk premium input by 100 basis points	600
Increase in liability as a result of decreasing the discount rate by 100 basis points	2,500
Decrease in liability as a result of increasing the discount rate by 100 basis points	2,800
Debt Securities, One
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in debt securities				$ 25,000
Debt Securities, Two
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in debt securities			$ 13,000
Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in debt securities	0	$ 0
Level 2 | Recurring | Convertible Notes | Notes due 2028
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable fair value	568,200
Level 2 | Recurring | Convertible Notes | Notes due 2026
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable fair value	611,900
Level 2 | Recurring | Convertible Notes | Notes due 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable fair value	$ 256,500

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FAIR VALUE MEASUREMENTS - Debt Securities Schedule of Fair Value (Details) - Investments in debt securities - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 39,926	$ 26,437	$ 41,042	$ 0
Investment	0	20,000	0	45,000
Fair value adjustments included in other (expense) income, net	987	932	(129)	2,369
Balance at end of period	$ 40,913	$ 47,369	$ 40,913	$ 47,369

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FAIR VALUE MEASUREMENTS - Contingent Consideration Schedule of Fair Value (Details) - Contingent consideration - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 0	$ 3,540	$ 3,710	$ 0
Addition	0	0	0	3,500
Fair value adjustments included in other income (expense), net	0	56	15	96
Paid	0	0	(3,725)	0
Balance at end of period	$ 0	$ 3,596	$ 0	$ 3,596

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FAIR VALUE MEASUREMENTS - Schedule of Changes in Nonfinancial Liabilities Related to Warrant Obligations Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Details) - Recurring - Total warranty obligations measured at fair value - Level 3 - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 61,586	$ 33,319	$ 51,007	$ 28,736
Accruals for warranties issued during period	11,120	3,319	19,890	7,213
Changes in estimates	14,692	2,755	18,591	5,338
Settlements	(4,668)	(1,910)	(8,724)	(3,825)
Increase due to accretion expense	1,828	1,104	3,343	2,047
Other	(10,636)	(550)	(10,185)	(1,472)
Balance at end of period	$ 73,923	$ 38,037	$ 73,923	$ 38,037

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FAIR VALUE MEASUREMENTS - Summary of Significant Unobservable Inputs used in the Fair Value Measurement of Liabilities Designated as Level 3 (Details) - Recurring - Level 3 - Warranty obligations for products sold since January 1, 2014	Jun. 30, 2022	Dec. 31, 2021
Profit element and risk premium
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warranty obligations, measurement input	16.00%	15.00%
Credit-adjusted risk-free rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warranty obligations, measurement input	16.00%	12.00%

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DEBT - Long-term debt (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Mar. 01, 2021
Debt Instrument [Line Items]
Total carrying amount of debt	$ 1,286,215	$ 1,037,646
Less: current portion of convertible notes	(88,429)	(86,052)
Debt, non-current	1,197,786	951,594
Convertible Notes | Notes due 2028
Debt Instrument [Line Items]
Long-term debt, gross	575,000	575,000
Less: unamortized debt discount	0	(143,636)
Less: unamortized debt issuance costs	(7,359)	(5,775)	$ (6,600)
Total carrying amount of debt	567,641	425,589
Convertible Notes | Notes due 2026
Debt Instrument [Line Items]
Long-term debt, gross	632,500	632,500
Less: unamortized debt discount	0	(104,755)
Less: unamortized debt issuance costs	(7,312)	(6,678)
Total carrying amount of debt	625,188	521,067
Convertible Notes | Notes due 2025
Debt Instrument [Line Items]
Long-term debt, gross	102,175	102,175
Less: unamortized debt discount	(12,447)	(14,584)
Less: unamortized debt issuance costs	(1,299)	(1,539)
Total carrying amount of debt	88,429	86,052
Less: current portion of convertible notes	(102,200)
Convertible Notes | Notes due 2023
Debt Instrument [Line Items]
Long-term debt, gross	5,000	5,000
Less: unamortized debt issuance costs	(43)	(62)
Total carrying amount of debt	$ 4,957	$ 4,938

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DEBT - Convertible Senior Notes due in 2028 Narrative (Details) $ / shares in Units, $ in Thousands, shares in Millions		6 Months Ended
	Mar. 01, 2021 USD ($) tradingDay $ / shares shares	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jan. 01, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Deferred taxes		$ 174,307			$ 122,470
Additional paid in capital		(713,473)			(837,924)
Retained Earnings (Accumulated Deficit)		251,230			405,737
Payment for bonds hedge		0	$ 286,235
Proceeds from sale of warrants		0	$ 220,800
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Additional paid in capital				$ 207,900
Convertible debt				244,500
Deferred income tax liabilities				62,300
Retained Earnings (Accumulated Deficit)				25,700
Notes due 2028 | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Additional paid in capital				117,300
Convertible debt				141,300
Deferred income tax liabilities				36,000
Retained Earnings (Accumulated Deficit)				$ 12,000
Convertible Notes | Notes due 2028
Debt Instrument [Line Items]
Debt instrument face amount	$ 575,000
Interest rate	0.00%
Proceeds from convertible debt	$ 566,400
Conversion ratio	0.0035104
Debt conversion price (in USD per share) | $ / shares	$ 284.87
Convertible note, liability component	$ 415,000
Convertible note, equity component	160,000
Deferred taxes	40,100
Debt issuance costs	9,100
Unamortized debt issuance costs	6,600	$ 7,359			$ 5,775
Debt issuance costs, allocated to capital	$ 2,500
Conversion shares (in shares) | shares	2.0
Payment for bonds hedge	$ 161,600
Warrants issued, strike price (in USD per share) | $ / shares	$ 397.91
Proceeds from sale of warrants	$ 123,400
Convertible Notes | Notes due 2028 | Discount rate
Debt Instrument [Line Items]
Measurement input	0.0477
Period One | Convertible Notes | Notes due 2028
Debt Instrument [Line Items]
Threshold percentage	130.00%
Stock trigger price (in USD per share) | $ / shares	$ 370.33
Number of threshold trading days | tradingDay	20
Number of consecutive trading days | tradingDay	30
Measurement period percentage of stock price trigger	98.00%
Period Two | Convertible Notes | Notes due 2028
Debt Instrument [Line Items]
Threshold percentage	100.00%
Number of consecutive trading days | tradingDay	5
Business day period after measurement period	5 days

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DEBT - Schedule of Convertible Senior Notes due in 2028 (Details) - Convertible Notes - Notes due 2028 - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Instrument [Line Items]
Amortization of debt discount	$ 0	$ 4,872	$ 0	$ 6,483
Amortization of debt issuance costs	327	236	643	315
Total interest cost recognized	$ 327	$ 5,108	$ 643	$ 6,798

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DEBT - Convertible Senior Notes due in 2026 Narrative (Details) $ / shares in Units, shares in Millions		6 Months Ended
	Mar. 01, 2021 USD ($) tradingDay $ / shares shares	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jan. 01, 2022 USD ($)	Dec. 31, 2021 USD ($)	Mar. 12, 2021 USD ($)
Debt Instrument [Line Items]
Deferred taxes		$ 174,307,000			$ 122,470,000
Additional paid in capital		(713,473,000)			(837,924,000)
Retained Earnings (Accumulated Deficit)		251,230,000			405,737,000
Payment for bonds hedge		0	$ 286,235,000
Proceeds from sale of warrants		0	$ 220,800,000
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Additional paid in capital				$ 207,900,000
Convertible debt				244,500,000
Deferred income tax liabilities				62,300,000
Retained Earnings (Accumulated Deficit)				25,700,000
Notes due 2026 | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Additional paid in capital				90,600,000
Convertible debt				103,200,000
Deferred income tax liabilities				26,300,000
Retained Earnings (Accumulated Deficit)				$ 13,700,000
Convertible Notes | Notes due 2026
Debt Instrument [Line Items]
Debt instrument face amount	$ 575,000,000					$ 57,500,000
Proceeds from convertible debt	$ 623,000,000
Conversion ratio	0.0032523
Debt conversion price (in USD per share) | $ / shares	$ 307.47
Convertible note, liability component	$ 509,000,000
Convertible note, equity component	123,500,000
Deferred taxes	31,000,000
Debt issuance costs	10,000,000	8,000,000
Debt issuance costs, allocated to capital	$ 2,000,000
Conversion shares (in shares) | shares	2.1
Payment for bonds hedge	$ 124,600,000
Warrants issued, strike price (in USD per share) | $ / shares	$ 397.91
Proceeds from sale of warrants	$ 97,400,000
Unamortized debt issuance costs		$ 7,312,000			$ 6,678,000
Convertible Notes | Notes due 2026 | Discount rate
Debt Instrument [Line Items]
Measurement input	0.0444
Period One | Convertible Notes | Notes due 2026
Debt Instrument [Line Items]
Threshold percentage	130.00%
Stock trigger price (in USD per share) | $ / shares	$ 399.71
Number of threshold trading days | tradingDay	20
Number of consecutive trading days | tradingDay	30
Measurement period percentage of stock price trigger	98.00%
Period Two | Convertible Notes | Notes due 2026
Debt Instrument [Line Items]
Threshold percentage	100.00%
Number of consecutive trading days | tradingDay	5
Business day period after measurement period	5 days

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DEBT - Schedule of Convertible Senior Notes due in 2026 (Details) - Convertible Notes - Notes due 2026 - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Instrument [Line Items]
Amortization of debt discount	$ 0	$ 5,587	$ 0	$ 7,373
Amortization of debt issuance costs	502	404	987	539
Total interest cost recognized	$ 502	$ 5,991	$ 987	$ 7,912

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DEBT - Convertible Senior Notes due in 2025 Narrative (Details)			2 Months Ended	3 Months Ended			6 Months Ended		12 Months Ended
	Mar. 01, 2021 USD ($) shares	Mar. 09, 2020 USD ($) tradingDay $ / shares shares	May 19, 2020 tradingDay shares	Jun. 30, 2022 USD ($) $ / shares shares	Jun. 30, 2021 USD ($) shares	Mar. 31, 2021 USD ($) shares	Jun. 30, 2022 USD ($) $ / shares shares	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($) $ / shares shares	May 20, 2020 USD ($) $ / shares shares
Debt Instrument [Line Items]
Principal amount outstanding				$ 1,286,215,000			$ 1,286,215,000		$ 1,037,646,000
Common stock, par value (in usd per share) | $ / shares				$ 0.00001			$ 0.00001		$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares) | shares			150,000,000	300,000,000			300,000,000		300,000,000	200,000,000
Deferred taxes				$ 174,307,000			$ 174,307,000		$ 122,470,000
Partial repurchase of convertible notes							0	$ 289,312,000
Loss on partial settlement of convertible notes				0	$ 13,000		0	56,382,000
Debt, current				$ 88,429,000			88,429,000		86,052,000
Payment for bonds hedge							0	286,235,000
Proceeds from sale of warrants							$ 0	220,800,000
Warrants obligations measured at fair value										$ 96,400,000
Convertible Notes
Debt Instrument [Line Items]
Convertible notes embedded derivative										117,100,000
Convertible Notes | Notes due 2025
Debt Instrument [Line Items]
Debt instrument face amount		$ 320,000,000
Interest rate		0.25%		1.00%			1.00%
Conversion ratio		0.0122637
Debt conversion price (in USD per share) | $ / shares		$ 81.54
Proceeds from convertible debt		$ 313,000,000
Number of consecutive trading days | tradingDay			20
Principal amount outstanding				$ 88,429,000			$ 88,429,000		86,052,000
Convertible notes embedded derivative		68,700,000								116,300,000
Embedded derivative, host contract		$ 251,300,000
Deferred taxes										200,000
Debt issuance costs										$ 7,600,000
Partial repurchase of convertible notes						$ 217,700,000
Exercise of warrants related to convertible senior notes (in shares) | shares	1,670,000				485
Equity component of convertible senior notes, net	$ 302,700,000				$ 100,000
Convertible note, liability component	184,500,000
Residual conversion price	$ 4,300,000
Induced conversion of convertible debt expense								37,500,000
Remaining expected life	4 years 1 month 6 days
Write off of debt discount	$ 38,500,000
Write off of deferred debt issuance cost	$ 4,100,000
Loss on partial settlement of convertible notes								$ 9,400,000
Conversion of debt					$ 100,000
Debt, current				$ 102,200,000			$ 102,200,000
Effective percentage rate				5.18%			5.18%
Unamortized discount				$ 12,447,000			$ 12,447,000		$ 14,584,000
Remaining discount amortization period							270.00%
Conversion shares (in shares) | shares		3,900,000
Payment for bonds hedge		$ 89,100,000
Warrants issued, strike price (in USD per share) | $ / shares		$ 106.94
Proceeds from sale of warrants		$ 71,600,000
Convertible notes hedge settlements, shares received (in shares) | shares						1,900,000
Warrants unwound, shares issued (in shares) | shares						1,800,000
Convertible notes hedge transaction, options outstanding (in shares) | shares				1,300,000			1,300,000
Warrants outstanding (in shares) | shares				1,300,000			1,300,000
Convertible Notes | Notes due 2025 | Discount rate
Debt Instrument [Line Items]
Measurement input	0.0435
Period One | Convertible Notes | Notes due 2025
Debt Instrument [Line Items]
Number of threshold trading days | tradingDay		20
Number of consecutive trading days | tradingDay		30
Threshold percentage		130.00%
Stock trigger price (in USD per share) | $ / shares							$ 106.00		$ 106.00
Period Two | Convertible Notes | Notes due 2025
Debt Instrument [Line Items]
Number of consecutive trading days | tradingDay		5
Threshold percentage		100.00%
Business day period after measurement period		5 days
Measurement period percentage of stock price trigger		98.00%

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DEBT - Schedule of Convertible Senior Notes due in 2025 (Details) - Convertible Notes - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Notes due 2025
Debt Instrument [Line Items]
Contractual interest expense	$ 64	$ 64	$ 128	$ 214
Amortization of debt discount	1,088	1,033	2,137	3,422
Amortization of debt issuance costs	123	122	241	416
Total interest cost recognized	1,275	1,219	2,506	4,052
Notes due 2028
Debt Instrument [Line Items]
Amortization of debt discount	0	4,872	0	6,483
Amortization of debt issuance costs	327	236	643	315
Total interest cost recognized	327	5,108	643	6,798
Notes due 2026
Debt Instrument [Line Items]
Amortization of debt discount	0	5,587	0	7,373
Amortization of debt issuance costs	502	404	987	539
Total interest cost recognized	$ 502	$ 5,991	$ 987	$ 7,912

XML

DEBT - Convertible Senior Notes due 2023 Narrative (Details) - Convertible Notes - Notes due 2023		1 Months Ended
	Jun. 05, 2019 USD ($) shares	Aug. 31, 2018 USD ($) $ / shares	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Debt instrument face amount		$ 65,000,000	$ 5,000,000	$ 5,000,000
Interest rate		4.00%
Debt converted	$ 60,000,000
Conversion shares (in shares) | shares	10,801,080
Fees paid for repurchase and exchange of convertible notes	$ 6,000,000
Conversion ratio		0.1800180
Debt conversion price (in USD per share) | $ / shares		$ 5.56
Redemption price percentage		100.00%

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DEBT - Schedule of Convertible Senior Notes due 2023 (Details) - Convertible Notes - Notes due 2023 - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Instrument [Line Items]
Contractual interest expense	$ 50	$ 50	$ 100	$ 100
Amortization of debt issuance costs	10	10	20	20
Total interest cost recognized	$ 60	$ 60	$ 120	$ 120

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COMMITMENTS AND CONTINGENCIES - Narrative (Details) $ in Millions	Jun. 30, 2022 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Term of lease contract, maximum renewal term	12 years
Purchase obligation	$ 439.4

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COMMITMENTS AND CONTINGENCIES - Lease Expense Components (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Operating lease costs	$ 2,052	$ 1,815	$ 3,989	$ 3,446

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COMMITMENTS AND CONTINGENCIES - Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Operating lease liabilities, current (Accrued liabilities)	$ 3,804	$ 3,830
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued Liabilities, Current	Accrued Liabilities, Current
Operating lease liabilities, non-current (Other liabilities)	$ 16,181	$ 11,920
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
Total operating lease liabilities	$ 19,985	$ 15,750
Weighted average remaining lease term	5 years 9 months 18 days	5 years 10 months 24 days
Weighted average discount rate	6.30%	7.40%

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COMMITMENTS AND CONTINGENCIES - Supplemental Cash Flow and Other Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Operating cash flows from operating leases	$ 1,325	$ 1,425	$ 2,843	$ 2,786
Lease liabilities arising from obtaining right-of-use assets	$ 0	$ 0	$ 6,742	$ 0

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COMMITMENTS AND CONTINGENCIES - Schedule of Minimum Lease Payments Under Noncancelable Operating Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2022 (remaining six months)	$ 2,417
2023	5,141
2024	4,281
2025	3,577
2026	2,618
Thereafter	5,825
Total lease payments	23,859
Less: imputed lease interest	(3,874)
Total lease liabilities	$ 19,985	$ 15,750

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STOCK-BASED COMPENSATION - Summary of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 53,064	$ 15,312	$ 100,861	$ 30,156
Post combination expense accrual (Accrued liabilities)
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	4,822	0	7,125	0
Cost of revenues
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	3,131	1,060	5,638	2,042
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	16,266	5,467	29,995	11,216
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	22,176	5,335	35,233	8,872
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 11,491	$ 3,450	$ 29,995	$ 8,026

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STOCK-BASED COMPENSATION - Summary of Stock-Based Compensation Expense Associated with Each Type of Award (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 53,064	$ 15,312	$ 100,861	$ 30,156
Stock options, RSUs and PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	47,228	14,361	91,340	28,201
Employee stock purchase plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	1,014	951	2,396	1,955
Post combination expense accrual (Accrued liabilities)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 4,822	$ 0	$ 7,125	$ 0

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STOCK-BASED COMPENSATION - Narrative (Details) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)
Share-Based Payment Arrangement [Abstract]
Total unrecognized compensation cost	$ 319.8
Weighted-average recognition period for unrecognized compensation cost	2 years 3 months 18 days

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STOCK-BASED COMPENSATION - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Number of Shares Outstanding
Outstanding, beginning balance (in shares)	2,264
Granted (in shares)	0
Exercised (in shares)	(360)
Canceled (in shares)	(1)
Outstanding, ending balance (in shares)	1,903
Shares outstanding, vested and expected to vest (in shares)	1,903
Shares outstanding, exercisable (in shares)	1,903
Weighted- Average Exercise Price per Share
Outstanding, beginning balance (in usd per share)	$ 1.90
Granted (in usd per share)	0
Exercised (in usd per share)	1.74
Canceled (in usd per share)	8.82
Outstanding, ending balance (in usd per share)	1.93
Weighted-average exercise price, vested and expected (in usd per share)	1.93
Weighted-average exercise price, exercisable (in usd per share)	$ 1.93
Weighted-Average Remaining Contractual Term
Outstanding	2 years 4 months 24 days
Vested and expected to vest	2 years 4 months 24 days
Exercisable	2 years 4 months 24 days
Aggregate Intrinsic Value
Outstanding	$ 367,918
Exercised	65,153
Vested and expected to vest	367,918
Exercisable	$ 367,918
Share price (in usd per share)	$ 195.24

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STOCK-BASED COMPENSATION - Summary of Stock Options Outstanding (Details) shares in Thousands	6 Months Ended
	Jun. 30, 2022 $ / shares shares
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options outstanding, number of shares (shares) | shares	1,903
Options outstanding - weighted- average remaining life	2 years 4 months 24 days
Options outstanding - weighted- average exercise price (usd per share)	$ 1.93
Options exercisable - number of shares exercisable (shares) | shares	1,903
Options exercisable - weighted-average exercise price (usd per share)	$ 1.93
$0.70 —– $1.11
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, lower limit (usd per share)	0.70
Exercise price range, upper limit (usd per share)	$ 1.11
Options outstanding, number of shares (shares) | shares	479
Options outstanding - weighted- average remaining life	2 years 9 months 18 days
Options outstanding - weighted- average exercise price (usd per share)	$ 0.80
Options exercisable - number of shares exercisable (shares) | shares	479
Options exercisable - weighted-average exercise price (usd per share)	$ 0.80
$1.29 —– $1.29
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, lower limit (usd per share)	1.29
Exercise price range, upper limit (usd per share)	$ 1.29
Options outstanding, number of shares (shares) | shares	1,000
Options outstanding - weighted- average remaining life	2 years 2 months 12 days
Options outstanding - weighted- average exercise price (usd per share)	$ 1.29
Options exercisable - number of shares exercisable (shares) | shares	1,000
Options exercisable - weighted-average exercise price (usd per share)	$ 1.29
$1.31 —– $5.53
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, lower limit (usd per share)	1.31
Exercise price range, upper limit (usd per share)	$ 5.53
Options outstanding, number of shares (shares) | shares	380
Options outstanding - weighted- average remaining life	2 years
Options outstanding - weighted- average exercise price (usd per share)	$ 2.15
Options exercisable - number of shares exercisable (shares) | shares	380
Options exercisable - weighted-average exercise price (usd per share)	$ 2.15
$14.58 —– $14.58
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, lower limit (usd per share)	14.58
Exercise price range, upper limit (usd per share)	$ 14.58
Options outstanding, number of shares (shares) | shares	33
Options outstanding - weighted- average remaining life	3 years 9 months 18 days
Options outstanding - weighted- average exercise price (usd per share)	$ 14.58
Options exercisable - number of shares exercisable (shares) | shares	33
Options exercisable - weighted-average exercise price (usd per share)	$ 14.58
$64.17 —– $64.17
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, lower limit (usd per share)	64.17
Exercise price range, upper limit (usd per share)	$ 64.17
Options outstanding, number of shares (shares) | shares	11
Options outstanding - weighted- average remaining life	4 years 9 months 18 days
Options outstanding - weighted- average exercise price (usd per share)	$ 64.17
Options exercisable - number of shares exercisable (shares) | shares	11
Options exercisable - weighted-average exercise price (usd per share)	$ 64.17

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STOCK-BASED COMPENSATION - Summary of Restricted Stock Unit Activity and Performance Stock Units (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Aggregate Intrinsic Value
Share price (in usd per share)	$ 195.24
Restricted stock units
Number of Shares Outstanding
Outstanding, beginning balance (in shares)	2,786
Granted (in shares)	561
Vested (in shares)	(916)
Canceled (in shares)	(113)
Outstanding, ending balance (in shares)	2,318
Number of shares outstanding, expected to vest (in shares)	2,318
Weighted Average Fair Value per Share at Grant Date
Outstanding, beginning balance (in usd per share)	$ 100.73
Granted (in usd per share)	175.97
Vested (in usd per share)	67.21
Canceled (in usd per share)	139.67
Outstanding, ending balance (in usd per share)	130.32
Weighted-Average Fair Value per Share at Grant Date, Expected to vest (in usd per share)	$ 130.32
Weighted-Average Remaining Contractual Term
Outstanding	1 year 2 months 12 days
Expected to vest	1 year 2 months 12 days
Aggregate Intrinsic Value
Outstanding	$ 452,664
Vested	151,219
Aggregate intrinsic value, expected to vest	$ 452,556
Performance shares
Number of Shares Outstanding
Outstanding, beginning balance (in shares)	445
Granted (in shares)	392
Vested (in shares)	(303)
Canceled (in shares)	(176)
Outstanding, ending balance (in shares)	358
Number of shares outstanding, expected to vest (in shares)	358
Weighted Average Fair Value per Share at Grant Date
Outstanding, beginning balance (in usd per share)	$ 169.82
Granted (in usd per share)	192.72
Vested (in usd per share)	168.88
Canceled (in usd per share)	170.96
Outstanding, ending balance (in usd per share)	195.14
Weighted-Average Fair Value per Share at Grant Date, Expected to vest (in usd per share)	$ 195.14
Weighted-Average Remaining Contractual Term
Outstanding	8 months 12 days
Expected to vest	8 months 12 days
Aggregate Intrinsic Value
Outstanding	$ 69,900
Vested	51,393
Aggregate intrinsic value, expected to vest	$ 69,900

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INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Income tax provision (benefit)	$ 15,232	$ 6,995	$ 20,818	$ (26,369)
Income (loss) before income taxes	$ 92,208	$ 46,346	$ 149,615	$ 44,680

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NET INCOME PER SHARE - Schedule of Computation of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net income	$ 76,976	$ 39,351	$ 128,797	$ 71,049
Interest and financing costs, net	662	45	1,304	89
Adjusted net income	$ 77,638	$ 39,396	$ 130,101	$ 71,138
Denominator:
Weighted average common shares outstanding (in shares)	135,196	135,094	134,768	133,209
Employee stock-based awards (in shares)	3,042	4,554	3,399	5,177
Weighted average common shares outstanding for diluted calculation (in shares)	143,725	141,533	143,602	144,022
Basic and diluted net income per share
Net income per share, basic (in USD per share)	$ 0.57	$ 0.29	$ 0.96	$ 0.53
Net income per share, diluted (in USD per share)	$ 0.54	$ 0.28	$ 0.91	$ 0.49
Notes due 2024
Denominator:
Warrants (in shares)	0	43	0	1,268
Notes due 2025
Denominator:
Warrants (in shares)	512	340	460	825
Convertible Notes | Notes due 2023
Denominator:
Notes due (in shares)	900	900	900	900
Convertible Notes | Notes due 2024
Denominator:
Notes due (in shares)	0	45	0	1,506
Convertible Notes | Notes due 2025
Denominator:
Notes due (in shares)	0	557	0	1,137
Convertible Notes | Notes due 2026
Denominator:
Notes due (in shares)	2,057	0	2,057	0
Convertible Notes | Notes due 2028
Denominator:
Notes due (in shares)	2,018	0	2,018	0

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NET INCOME PER SHARE- Schedule of Potentially Dilutive Securities Excluded from the Computation of Diluted Net Income Per Share (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	6,721	11,249	7,374	7,318
Employee stock-based awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	572	178	598	88
Warrants | Notes due 2028
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	2,425	3,457	2,735	2,264
Warrants | Notes due 2026
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	2,471	3,457	2,788	2,264
Notes due | Notes due 2028
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	0	1,902	0	1,234
Notes due | Notes due 2026
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	0	2,255	0	1,468
Notes due | Notes due 2025
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	1,253	0	1,253	0

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NET INCOME PER SHARE - Narrative (Details)	Jun. 30, 2022	Mar. 09, 2020
Notes due 2025 | Convertible Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Interest rate	1.00%	0.25%

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RELATED PARTY (Details) - Convertible Notes - Notes due 2023 - USD ($)	Jun. 30, 2022	Dec. 31, 2021	Dec. 31, 2018	Aug. 31, 2018
Related Party Transaction [Line Items]
Debt instrument face amount	$ 5,000,000	$ 5,000,000		$ 65,000,000
Thurman John Rodgers
Related Party Transaction [Line Items]
Debt instrument face amount	$ 5,000,000	$ 5,000,000	$ 5,000,000