HVIP FY23-24 Funding and Policy Reminders

December 15, 2023

HVIP’s Public School Bus Set-Aside Closed Now

The HVIP Public School Bus Set-Aside & EnergIIZE – Joint Application closed on December 15, 2023, at 5:00 pm Pacific Time. The Joint Application offered funding for zero-emission school buses, including funding for the installation of charging infrastructure to help power your new zero-emission school buses.

​​​Please reach out to [email protected] with questions.

New HVIP Fleet Size Definition Effective January 1

As part of policy changes adopted for the Clean Truck and Bus Voucher Incentive Project (HVIP) by the California Air Resources Board (CARB) in November, HVIP’s definition of “fleet size” will be changing for all voucher requests placed on or after 1/1/24, in Standard HVIP and all Set-Asides except for the Public School Bus Set-Aside.

Co​​​​nsistent with the Advanced Clean Fleet regulation, HVIP’s new fleet size definition is inclusive of the fleet’s vehicles domiciled anywhere globally that are over 8,500 lbs GVWR, including all such vehicles under common ownership or control, as defined in HVIP’s Implementation Manual. ​

Fleet size is inclusive of vehicles registered with the California Department of Motor Vehicles ​(DMV) as non-operational, but excluding off-road vehicles, unregistered vehicles, and those ​registered with the DMV as non-revivable junk or dismantled.​

Fleet size is inclusive of existing unredeemed HVIP vouchers, but DOES NOT count the current ​voucher request; therefore, if a voucher(s) represents the fleet’s first ZEV purchase, a fleet size ​ of “0” should be entered. Before voucher redemption, additional verification of fleet size may ​ be required at CARB’s sole discretion, including site visits.

The criteria used to determine eligible fleet size follows the definition in the FY22-23 Implementation Manual until 1/1/24.

Important reminders

  • Updates to the online Voucher Processing Center are underway to reflect the doubled base voucher amounts for small fleets, and adjustments to DAC eligibility, announced in November. Voucher-specific updates will be provided to dealers and purchasers in the coming weeks.
  • For Standard HVIP and all Set-Asides except for the Public School Bus Set-Aside and ISEF, HVIP can cover up to 90% of the cost of each vehicle for private entities, and up to 100% for public entities, exclusive of taxes, fees, and other non-vehicle costs. See details about the Public School Bus Set Aside and ISEF at
  • Information about how the Advanced Clean Fleet regulation (ACF) interacts with HVIP is addressed in the FAQs at
  • PO age: Starting 1/1/24, Purchase Orders or other binding sales agreements for private-entity purchasers can be dated no earlier than 90 calendar days before the date the voucher request is submitted. For public-entity purchasers, POs or other binding sales agreements can be no older than March 30, 2023. Letters of Intent, permitted for transit purchasers only, can be no older than 1/1/24.
  • Other policy updates announced in November are summarized here. The FY23-24 Implementation Manual is anticipated to be released in spring 2024 with more information about these changes, with mandatory Dealer Training to be announced in advance.

For more information, please contact [email protected] and see the FAQs at​​​​​

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