Exhibit 4.57

Execution Version

SUPPLEMENTAL INDENTURE
ADDITIONAL SUBSIDIARY GUARANTEES

5.250% Senior Notes due 2029

SUPPLEMENTAL INDENTURE (this “Supplemental Indenture for Additional Guarantees”), dated as of February 17, 2022, among each of the signatories hereto (each, a “Guaranteeing Subsidiary”), each a subsidiary of NRG Energy, Inc. (or its permitted successor), a Delaware corporation (the “Company”), the Company, the other Guarantors (as defined in the Indenture referred to herein) and Delaware Trust Company (as successor to Law Debenture Trust Company of New York), as trustee under the Indenture referred to below (the “Trustee”).

W I T N E S S E T H

WHEREAS, the Company has heretofore executed and delivered to the Trustee an indenture (the “Base Indenture”), dated as of May 23, 2016, between the Company and the Trustee, as amended by a Fifth Supplemental Indenture (the “Supplemental Indenture” and, together with the Base Indenture, the “Indenture”), dated as of May 14, 2019, among the Company, the Guarantors named therein and the Trustee, providing for the original issuance of an aggregate principal amount of $733,000,000 of 5.250% Senior Notes due 2029 (the “Initial Notes”), and, subject to the terms of the Supplemental Indenture, future issuances of 5.250% Senior Notes due 2029 (the “Additional Notes,” and, together with the Initial Notes, the “Notes”);

WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiaries shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiaries shall unconditionally guarantee all of the Company’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Subsidiary Guarantee”); and

WHEREAS, pursuant to Sections 4.10 and 9.01 of the Supplemental Indenture, the Trustee, the Company and the other Guarantors are authorized to execute and deliver this Supplemental Indenture for Additional Guarantees.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, each Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1.CAPITALIZED TERMS. Capitalized terms used herein without definition shall have the meanings assigned to them in the Supplemental Indenture.

2.AGREEMENT TO GUARANTEE. Each Guaranteeing Subsidiary hereby becomes a party to the Supplemental Indenture as a Guarantor and as such will have all the rights and be subject to all the Obligations and agreements of a Guarantor under the Indenture. Each Guaranteeing Subsidiary hereby agrees to provide an unconditional Guarantee on the terms and subject to the conditions set forth in the Subsidiary Guarantee and in the Supplemental Indenture including but not limited to Article 10 thereof.

3.NO RECOURSE AGAINST OTHERS. No director, officer, employee, incorporator or stockholder of the Company or any Guarantor, as such, will have any liability for any obligations of the Company or the Guarantors under the Notes, the Indenture, the Subsidiary Guarantees or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of Notes by accepting a Note waives and releases all such liability. The

waiver and release are part of the consideration for issuance of the Notes. The waiver may not be effective to waive liabilities under the federal securities laws.

4.NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE FOR ADDITIONAL GUARANTEES BUT WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

5.COUNTERPARTS. The parties may sign any number of copies of this Supplemental Indenture for Additional Guarantees. Each signed copy shall be an original, but all of them together represent the same agreement.

6.EFFECT OF HEADINGS. The Section headings herein are for convenience only and shall not affect the construction hereof.

7.THE TRUSTEE. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture for Additional Guarantees or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiaries and the Company.

8.RATIFICATION OF INDENTURE; SUPPLEMENTAL INDENTURE FOR ADDITIONAL GUARANTEES PART OF INDENTURE. Except as expressly amended hereby, the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Supplemental Indenture for Additional Guarantees shall form a part of the Indenture for all purposes, and every Holder of Notes heretofore or hereafter authenticated and delivered shall by bound hereby.

9.ELECTRONIC SIGNATURES. Each of the transaction parties agrees on behalf of itself, and any Person acting or claiming by, under or through such transaction party, that any written instrument delivered in connection with this Supplemental Indenture for Additional Guarantees, the Indenture or any related document, including without limitation any amendments or supplements to such documents, may be executed by electronic methods (whether by .pdf scan or utilization of an electronic signature platform or application). Any electronic signature document delivered via email from a person authorized on an incumbency certificate provided by the Company, any Guaranteeing Subsidiary or any other Guarantor to the Trustee shall be considered signed or executed by such person on behalf of the Company, such Guaranteeing Subsidiary, or such other Guarantor, as applicable. Each of the Company, the Guaranteeing Subsidiaries, and the other Guarantors agree to assume all risks arising out of the use of electronic methods for all purposes including the authorization, execution, delivery, or submission of documents, instruments, notices, directions, instructions, reports, opinions and certificates to the Trustee, including without limitation the risk of the Trustee acting on unauthorized instructions, and the risk of interception and misuse by third parties. Any electronic signature shall have the same legal validity and enforceability as a manually executed signature to the fullest extent permitted by applicable law, including the Federal Electronic Signatures in Global and National Commerce Act, the New York State Electronic Signatures and Records Act, or any similar federal or state law, rule or regulation, as the same may be in effect from time to time, and the parties hereby waive any objection to the contrary. Any document accepted, executed or agreed to in conformity with such laws will be binding on all parties hereto to the same extent as if it were physically executed and each party hereby consents to the use of any third party electronic signature capture service providers as may be reasonably chosen by a signatory hereto.

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IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture for Additional Guarantees to be duly executed and attested, all as of the date first above written.

NRG CONTROLLABLE LOAD SERVICES LLC

By: /s/ Gaëtan C. Frotté________________________________
Name: Gaëtan C. Frotté
Title: Treasurer

[Signature Page – Supplemental Indenture for Additional Guarantees (Senior Notes due 2029)]

NRG ENERGY, INC.

By: /s/ Gaëtan C. Frotté____________________
Name: Gaëtan C. Frotté

Title: Senior Vice President & Treasurer

[Signature Page – Supplemental Indenture for Additional Guarantees (Senior Notes due 2029)]

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ACE ENERGY, INC.

ALLIED HOME WARRANTY GP LLC

ALLIED WARRANTY LLC

ASTORIA GAS TURBINE POWER LLC

BIDURENERGY, INC.

CABRILLO POWER I LLC

CABRILLO POWER II LLC

CARBON MANAGEMENT SOLUTIONS LLC

CIRRO ENERGY SERVICES, INC.

CIRRO GROUP, INC.

DIRECT ENERGY BUSINESS, LLC

DUNKIRK POWER LLC

EASTERN SIERRA ENERGY COMPANY LLC

EL SEGUNDO POWER, LLC

EL SEGUNDO POWER II LLC

ENERGY CHOICE SOLUTIONS LLC

ENERGY PLUS HOLDINGS LLC

ENERGY PLUS NATURAL GAS LLC

EVERYTHING ENERGY LLC

FORWARD HOME SECURITY, LLC

GCP FUNDING COMPANY, LLC

GREEN MOUNTAIN ENERGY COMPANY

GREGORY PARTNERS, LLC

GREGORY POWER PARTNERS LLC

HUNTLEY POWER LLC

INDEPENDENCE ENERGY ALLIANCE LLC

INDEPENDENCE ENERGY GROUP LLC

INDEPENDENCE ENERGY NATURAL GAS LLC

INDIAN RIVER OPERATIONS INC.

INDIAN RIVER POWER LLC

MERIDEN GAS TURBINES LLC

NEO CORPORATION

NEW GENCO GP, LLC

NORWALK POWER LLC

NRG ADVISORY SERVICES LLC

NRG AFFILIATE SERVICES INC.

NRG ARTHUR KILL OPERATIONS INC.

NRG ASTORIA GAS TURBINE OPERATIONS INC.

NRG BUSINESS SERVICES LLC

NRG CABRILLO POWER OPERATIONS INC.

By: /s/ Gaëtan C. Frotté     

Name: Gaëtan C. Frotté

Title: Treasurer

NRG CALIFORNIA PEAKER OPERATIONS LLC

NRG CEDAR BAYOU DEVELOPMENT COMPANY, LLC

NRG CONNECTED HOME LLC

NRG CURTAILMENT SOLUTIONS, INC.

NRG DEVELOPMENT COMPANY INC.

NRG DEVON OPERATIONS INC.

[Signature Page – Supplemental Indenture for Additional Guarantees (Senior Notes due 2029)]

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NRG DISPATCH SERVICES LLC

NRG DISTRIBUTED ENERGY RESOURCES HOLDINGS LLC

NRG DISTRIBUTED GENERATION PR LLC

NRG DUNKIRK OPERATIONS INC.

NRG ECOKAP HOLDINGS LLC

NRG EL SEGUNDO OPERATIONS INC.

NRG ENERGY LABOR SERVICES LLC

NRG ENERGY SERVICES GROUP LLC

NRG GENERATION HOLDINGS INC.

NRG GREENCO LLC

NRG HOME & BUSINESS SOLUTIONS LLC

NRG HOME SERVICES LLC

NRG HOME SOLUTIONS LLC

NRG HOME SOLUTIONS PRODUCT LLC

NRG HOMER CITY SERVICES LLC

NRG HQ DG LLC

NRG HUNTLEY OPERATIONS INC.

NRG IDENTITY PROTECT LLC

NRG ILION LP LLC

NRG INTERNATIONAL LLC

NRG MEXTRANS INC.

NRG MIDDLETOWN OPERATIONS INC.

NRG MONTVILLE OPERATIONS INC.

NRG NORTH CENTRAL OPERATIONS INC.

NRG NORWALK HARBOR OPERATIONS INC.

NRG OSWEGO HARBOR POWER OPERATIONS INC.

NRG SECURITY LLC

NRG SERVICES CORPORATION

NRG PORTABLE POWER LLC

NRG POWER MARKETING LLC

HOME WARRANTY OF AMERICA, INC.

By: /s/ Gaëtan C. Frotté     

Name: Gaëtan C. Frotté

Title: Treasurer

NRG RENTER’S PROTECTION LLC

NRG RETAIL LLC

NRG ROCKFORD ACQUISITION LLC

NRG SAGUARO OPERATIONS INC.

NRG SIMPLYSMART SOLUTIONS LLC

NRG TEXAS GREGORY LLC

NRG TEXAS HOLDING INC.

NRG TEXAS LLC

NRG TEXAS POWER LLC

NRG WARRANTY SERVICES LLC

NRG WEST COAST LLC

NRG WESTERN AFFILIATE SERVICES INC.

RELIANT ENERGY NORTHEAST LLC

RELIANT ENERGY POWER SUPPLY, LLC

RELIANT ENERGY RETAIL HOLDINGS, LLC

RELIANT ENERGY RETAIL SERVICES, LLC

[Signature Page – Supplemental Indenture for Additional Guarantees (Senior Notes due 2029)]

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RERH HOLDINGS, LLC

SAGUARO POWER LLC

SGE ENERGY SOURCING, LLC

SGE TEXAS HOLDCO, LLC

SOMERSET OPERATIONS INC.

SOMERSET POWER LLC

STREAM ENERGY COLUMBIA, LLC

STREAM ENERGY DELAWARE, LLC

STREAM ENERGY ILLINOIS, LLC

STREAM ENERGY MARYLAND, LLC

STREAM ENERGY NEW JERSEY, LLC

STREAM ENERGY NEW YORK, LLC

STREAM ENERGY PENNSYLVANIA, LLC

STREAM GEORGIA GAS SPE, LLC

STREAM OHIO GAS & ELECTRIC, LLC

STREAM SPE GP, LLC

TEXAS GENCO GP, LLC

TEXAS GENCO HOLDINGS, INC.

TEXAS GENCO LP, LLC

US RETAILERS LLC

VIENNA OPERATIONS INC.

VIENNA POWER LLC

WCP (GENERATION) HOLDINGS LLC

By: /s/ Gaëtan C. Frotté     

Name: Gaëtan C. Frotté

Title: Treasurer

WEST COAST POWER LLC

XOOM ALBERTA HOLDINGS, LLC

XOOM BRITISH COLUMBIA HOLDINGS, LLC

XOOM ENERGY GLOBAL HOLDINGS, LLC

XOOM ENERGY, LLC

XOOM ONTARIO HOLDINGS, LLC

XOOM SOLAR, LLC

By: /s/ Gaëtan C. Frotté     

Name: Gaëtan C. Frotté

Title: Treasurer

[Signature Page – Supplemental Indenture for Additional Guarantees (Senior Notes due 2029)]

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AIRTRON, INC.

AWHR AMERICA’S WATER HEATER RENTALS, L.L.C

BOUNCE ENERGY, INC.

CPL RETAIL ENERGY L.P.

DIRECT ENERGY BUSINESS MARKETING, LLC

DIRECT ENERGY CONNECTED HOME US INC.

DIRECT ENERGY GP, LLC

DIRECT ENERGY HOLDCO GP LLC

DIRECT ENERGY LEASING, LLC

DIRECT ENERGY MARKETING INC.

DIRECT ENERGY OPERATIONS, LLC

DIRECT ENERGY SERVICES, LLC

DIRECT ENERGY US HOLDINGS INC.

DIRECT ENERGY, LP

FIRST CHOICE POWER, LLC

GATEWAY ENERGY SERVICES CORPORATION

HOME WARRANTY HOLDINGS CORP.

MASTERS, INC.

RSG HOLDING CORP.

WTU RETAIL ENERGY L.P.

By: /s/ Gaëtan C. Frotté     

Name: Gaëtan C. Frotté

Title: Vice President

ENERGY ALTERNATIVES WHOLESALE, LLC

NRG OPERATING SERVICES, INC.

NRG SOUTH CENTRAL OPERATIONS INC.

By: /s/ Thomas A. Smith     

Name: Thomas A. Smith

Title: Vice President

NRG CONSTRUCTION LLC

NRG ENERGY SERVICES LLC

NRG MAINTENANCE SERVICES LLC

NRG RELIABILITY SOLUTIONS LLC

By: /s/ Linda Weigand     

Name: Linda Weigand

Title: Treasurer

ENERGY PROTECTION INSURANCE COMPANY

By: /s/ Gaëtan C. Frotté     

Name: Gaëtan C. Frotté

Title: Treasurer

NRG ILION LIMITED PARTNERSHIP

[Signature Page – Supplemental Indenture for Additional Guarantees (Senior Notes due 2029)]

By: NRG Rockford Acquisition LLC, its General Partner

By:    /s/Gaëtan C. Frotté_________________________

Name:    Gaëtan C. Frotté

Title: Treasurer    

NRG SOUTH TEXAS LP

By: Texas Genco GP, LLC, its General Partner

By: /s/ Gaëtan C. Frotté________________________

    Name:    Gaëtan C. Frotté

    Title: Treasurer

TEXAS GENCO SERVICES, LP

By: New Genco GP, LLC, its General Partner

By:    /s/Gaëtan C. Frotté_________________________

    Name:    Gaëtan C. Frotté

    Title: Treasurer    

STREAM SPE, LTD.

By: STREAM SPE GP, LLC, the sole general partner

By:    /s/Gaëtan C. Frotté_________________________

    Name:    Gaëtan C. Frotté

    Title: Treasurer    

NRG RETAIL NORTHEAST LLC

XOOM ENERGY CALIFORNIA, LLC

By: /s/ Gaëtan C. Frotté____________________________

Name: Gaëtan C. Frotté

Title: Vice President & Treasurer

XOOM ENERGY CONNECTICUT, LLC

XOOM ENERGY DELAWARE, LLC

XOOM ENERGY GEORGIA, LLC

XOOM ENERGY ILLINOIS, LLC

XOOM ENERGY INDIANA, LLC

XOOM ENERGY KENTUCKY, LLC

XOOM ENERGY MAINE, LLC

XOOM ENERGY MARYLAND, LLC

XOOM ENERGY MASSACHUSETTS, LLC

XOOM ENERGY MICHIGAN, LLC

XOOM ENERGY NEW HAMPSHIRE, LLC

XOOM ENERGY NEW JERSEY, LLC

XOOM ENERGY NEW YORK, LLC

XOOM ENERGY OHIO, LLC

XOOM ENERGY PENNSYLVANIA, LLC

XOOM ENERGY RHODE ISLAND, LLC

[Signature Page – Supplemental Indenture for Additional Guarantees (Senior Notes due 2029)]

XOOM ENERGY TEXAS, LLC

XOOM ENERGY VIRGINIA, LLC

XOOM ENERGY WASHINGTON D.C., LLC

By: XOOM ENERGY, LLC, the sole member

By: /s/ Gaëtan C. Frotté____________________________

Name: Gaëtan C. Frotté

Title: Treasurer

[Signature Page – Supplemental Indenture for Additional Guarantees (Senior Notes due 2029)]

DELAWARE TRUST COMPANY,
as Trustee

By: /s/ Benjamin Hancock____________________
Authorized Signatory

[Signature Page – Supplemental Indenture for Additional Guarantees (Senior Notes due 2029)]