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Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Power Solutions International, Inc.

Wood Dale, Illinois

We hereby consent to the incorporation by reference in the Registration Statement[s] on Form S-8 (No. 333-185096 and 333-191166) of Power Solutions International, Inc. (the Company) of our report dated March 24, 2025, relating to the consolidated financial statements, which appears in this Form 10-K. Our report contains an explanatory paragraph regarding the Company’s ability to continue as a going concern.

/s/ BDO USA, P.C.

Chicago, Illinois

March 24, 2025