Stock-Based Compensation	3 Months Ended
Mar. 31, 2026
Share-Based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based Compensation On March 6, 2026, the Company’s Board of Directors (the “Board”) approved the Power Solutions International, Inc. 2026 Phantom Unit Plan (the “Plan”). The Plan is designed to incentivize eligible service providers of the Company by granting cash-settled awards (“Phantom Units”) tied to the fair market value of the Company’s common stock. The Plan is administered by the Board or a committee thereof, which has full discretionary authority to grant awards, determine vesting schedules, interpret the Plan, and make all related determinations. Awards are subject to the Company’s clawback and recoupment policies, including any policies adopted to comply with the Dodd-Frank Wall Street Reform and Consumer Protection Act. Each Phantom Unit represents an unfunded and unsecured obligation of the Company to make a cash payment to the participant equal to the average fair market value per share of the Company’s common stock over the thirty (30) trading days immediately preceding the applicable vesting date. The Phantom Units do not represent actual equity interests in the Company, carry no voting rights, and do not entitle participants to dividends. The number of Phantom Units subject to each award is determined by dividing the dollar value of the award on the grant date by the average fair market value per share of the Company’s common stock over the thirty (30) trading days immediately preceding the grant date. Because settlement amounts are determined by reference to the average fair market value per share of the Company’s common stock over the thirty (30) trading days immediately preceding each applicable vesting date, the actual amounts payable under the Plan are not determinable at the time of grant. Phantom Units vest in three equal annual installments, with the first installment vesting on the vesting commencement date and the remaining installments vesting on each of the first and second anniversaries of the vesting commencement date, subject to the participant’s continuous service with the Company or its affiliates. Accelerated vesting of all unvested Phantom Units occurs upon (i) termination of service due to death or disability, (ii) a change in control in which the acquirer does not assume or substitute the outstanding awards, or (iii) an involuntary termination or resignation for good reason within twenty-four (24) months following a change in control in which the awards were assumed or substituted. Settlement is made in a lump sum cash payment within sixty (60) days following the applicable vesting date. The Company granted 17,435 units and the corresponding expense was insignificant for the period March 6, 2026 through March 31, 2026.

Stock-Based Compensation

3 Months Ended

Mar. 31, 2026

Share-Based Payment Arrangement [Abstract]

On March 6, 2026, the Company’s Board of Directors (the “Board”) approved the Power Solutions International, Inc. 2026 Phantom Unit Plan (the “Plan”). The Plan is designed to incentivize eligible service providers of the Company by granting cash-settled awards (“Phantom Units”) tied to the fair market value of the Company’s common stock. The Plan is administered by the Board or a committee thereof, which has full discretionary authority to grant awards, determine vesting schedules, interpret the Plan, and make all related determinations. Awards are subject to the Company’s clawback and recoupment policies, including any policies adopted to comply with the Dodd-Frank Wall Street Reform and Consumer Protection Act.

Each Phantom Unit represents an unfunded and unsecured obligation of the Company to make a cash payment to the participant equal to the average fair market value per share of the Company’s common stock over the thirty (30) trading days immediately preceding the applicable vesting date. The Phantom Units do not represent actual equity interests in the Company, carry no voting rights, and do not entitle participants to dividends. The number of Phantom Units subject to each award is determined by dividing the dollar value of the award on the grant date by the average fair market value per share of the Company’s common stock over the thirty (30) trading days immediately preceding the grant date. Because settlement amounts are determined by reference to the average fair market value per share of the Company’s common stock over the thirty (30) trading days immediately preceding each applicable vesting date, the actual amounts payable under the Plan are not determinable at the time of grant.

Phantom Units vest in three equal annual installments, with the first installment vesting on the vesting commencement date and the remaining installments vesting on each of the first and second anniversaries of the vesting commencement date, subject to the participant’s continuous service with the Company or its affiliates. Accelerated vesting of all unvested Phantom Units occurs upon (i) termination of service due to death or disability, (ii) a change in control in which the acquirer does not assume or substitute the outstanding awards, or (iii) an involuntary termination or resignation for good reason within twenty-four (24) months following a change in control in which the awards were assumed or substituted. Settlement is made in a lump sum cash payment within sixty (60) days following the applicable vesting date. The Company granted 17,435 units and the corresponding expense was insignificant for the period March 6, 2026 through March 31, 2026.