Cover Page - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Apr. 10, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--12-31
Document Period End Date	Dec. 31, 2022
Document Transition Report	false
Entity File Number	001-35944
Entity Registrant Name	POWER SOLUTIONS INTERNATIONAL, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	33-0963637
Entity Address, Address Line One	201 Mittel Drive
Entity Address, City or Town	Wood Dale
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60191
City Area Code	630
Local Phone Number	350-9400
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
ICFR Auditor Attestation Flag	false
Entity Public Float			$ 9.5
Entity Common Stock, Shares Outstanding		22,951,478
Documents Incorporated by Reference	Part III incorporates information by reference to the registrant’s definitive proxy statement (the “2023 proxy statement”), to be filed with the United States Securities and Exchange Commission (the “SEC”) within 120 days after the fiscal year ended December 31, 2022.
Entity Central Index Key	0001137091
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false