Power of Attorney for Section 16 Filings by Courtney C. Shea

Courtney C. Shea, a director of Power Solutions International, Inc. (PSI), has executed a Power of Attorney appointing the General Counsel, Associate General Counsel, and Vice President of Human Resources & Senior Counsel of PSI as her attorneys-in-fact. This authorization allows them to execute and file Forms 3, 4, and 5 on her behalf in accordance with Section 16(a) of the Securities Exchange Act of 1934. The Power of Attorney remains in effect until Shea is no longer required to file these forms or until she revokes it in writing. The document was signed on July 31, 2025.