About HVIP

The Hybrid and Zero-Emission Truck and Bus Voucher Incentive Project (HVIP) plays a crucial role in the deployment of zero-emission and near-zero-emission technologies. HVIP responds to a key market challenge by making clean vehicles more affordable for fleets through point-of-purchase price reductions.

Price Reductions

With an HVIP voucher, industry-leading vehicles can be as affordable as their traditional fossil-fueled counterparts, enabling purchasers of all sizes to deploy advanced technologies that are cleaner, quieter, and in line with state regulations.

Launched by the California Air Resources Board in 2009, HVIP is the earliest model in the U.S. to demonstrate the function, flexibility, and effectiveness of first-come first-served incentives that reduce the incremental cost of commercial vehicles. HVIP is administered by CALSTART, a national clean transportation nonprofit consortium, on behalf of CARB.

FY20-21 Implementation FAQs

When will HVIP re-open to voucher requests and how much money is available?

HVIP funds for FY 2020-2021 were available in three “waves.” HVIP opened to new voucher requests on June 8, 2021, with $84 million available, half of the total funds for this year (wave 1). The entire $84 million was requested within 3 hours of opening.

The second wave of funds (approximately $12 million) were available on a first-come, first-served basis starting at 10 a.m. Pacific on Tuesday, August 10, 2021. These funds have now been requested.

HVIP opened to new voucher requests on October 28 with $63 million available. Wave 3 of FY20-21 funding has now been fully requested. Additional funds are expected to be available early 2022.

Additional important information is on the Funding Page.

Where can I find a summary of the policy changes?

The FY20-21 Funding Plan for Clean Transportation Incentives was adopted by the CARB Board in Dec. 2020. The HVIP policy changes were summarized in an email announcement. 

The full FY20-21 Implementation Manual has been released and can be viewed at www.californiahvip.org/im.

Can vouchers currently be requested for Natural Gas Internal Combustion engines?

No. The 0.02 g/bhp-hr Natural Gas internal combustion engine graduated from HVIP eligibility in December 2020, however technologies certified to the newest optional Low NOx standard — of 0.01 g/bhp-hr as of the publication of the FY20-21 HVIP Implementation Manual — are HVIP-eligible. This change does not affect vouchers that have already been requested.

No engines have yet been certified by CARB to the 0.01 g/bhp-hr standard. When a certified engine is approved for HVIP eligibility, the technology will be added to the HVIP Eligible Vehicle Catalog.  

Is a binding Purchase Order required for requesting a voucher? How old can a P.O. be?

Yes. A valid signed Purchase Order (or other binding Agreement, Contract, Buyer’s Order, or action/resolution by a government entity’s governing body) is required at the time a voucher request is made. Non-binding agreements are not sufficient to reserve a voucher.

When HVIP re-opens, Purchase Orders for purchases made by private entities must be dated no more than 10 calendar days prior to the date of the corresponding voucher request. POs for private-entity purchasers can be no older than May 29, 2021.

In recognition of the complexity of purchases made by public entities, the timeline is 90 days, and case-by-case exceptions can be requested via voucherprocessing@tetratech.com for consideration by CARB. POs for private-entity purchasers can be no older than May 29, 2021. POs for public-entity purchasers can be no older than March 10, 2021.

A purchase order or other binding sales agreement that was eligible at the time of the initial opening in June will remain eligible throughout the project year, including Wave 3.

The Purchase Order must include the purchaser and dealer names, HVIP voucher amount, number of units (if a batch request), model and year of the vehicle, issued date, and the purchaser’s signature.

Within 10 days AFTER any voucher request, dealers must:
1) Provide the purchaser’s Truck and Bus Regulation (TRUCRS) ID or compliance certificate to the Voucher Processing Center. Or, a signed letter from the fleet purchaser stating that the fleet purchaser is not subject to TRUCRS must be submitted within 30 days.
2) Address any missing information that may have been identified during the initial review of the voucher request, such as a missing TIN or CA#, domicile location clarification, or vehicle model year confirmation. Dealers will be contacted within 5 business days of a voucher request regarding any missing information that must be addressed.

A factory build sheet or line setting ticket is NOT required to accompany any voucher request. Please note that this is a reversal of previous guidance.

What is a fleet cap?

Each fleet purchaser is limited to a “cap” of 30 voucher requests per calendar year, except for drayage fleets which are limited to 50 voucher requests per calendar year. Vehicles under common ownership or control that share a common TIN or CA # are considered part of a single fleet, even if they are part of different subsidiaries, divisions, or other organizational structures of a company or government agency.

What is a TIN and CA#?

A TIN is a Taxpayer identification number, used by the Internal Revenue Service.

The CA Highway Patrol requires in-state motor carriers to acquire a California Carrier Identification Number (CA Number) in order to obtain a Motor Carrier Permit.

Both TIN and CA# are required upon voucher request submission.

For the purposes of HVIP, what is a "purchaser"?

The Purchaser is the fleet that will purchase or lease the eligible vehicle and operate the vehicle for at least three years. Vehicles under common ownership or control that share a common TIN or CA # are considered part of a single fleet. A purchaser is not a manufacturer, dealership, or leasing company that enters into any agreement with another party to operate the vehicle. 

If my fleet reaches the 30-voucher cap, when can I apply for new vouchers?

If a fleet already has 30 vouchers (50 for drayage) submitted in a given calendar year that reach the status of “Accepted” or higher in the HVIP Voucher Processing Center, any additional voucher requests for that fleet will be rejected and the dealer and fleet will be notified. The fleet can request new vouchers in the next calendar year.

In instances where a public government entity has a binding sales agreement in place for more than 30 vehicles, that agreement can be used in two different calendar years (to obtain vouchers for 30 vehicles in the first calendar year and up to 30 more in the second calendar year). However, reserving vouchers in year one does not guarantee vouchers in year two; vouchers are first-come, first-served as funds are available.

If a purchaser is affiliated with vouchers that had been Accepted but subsequently cancelled, and wants to exceed the cap for this reason, please contact voucherprocessing@tetratech.com.

What is the "rolling"/"soft" manufacturer cap?

The manufacturer rolling “soft” cap allows each manufacturer (or parent company, as defined by TIN) to hold up to 100 unredeemed vouchers at a time across all of the manufacturer’s HVIP-eligible product line and approved Dealers. As a manufacturer redeems vouchers, more vouchers will become available for vehicles from that manufacturer. Under the “soft” cap, manufacturers can be granted additional vouchers beyond the cap on a case-by-case basis.

The cap does not prevent vouchers from being requested for a manufacturer’s technologies; rather it triggers the requirement for a case by case review process by CARB in order for those additional vouchers to be accepted. To request case by case approval to exceed the cap, manufacturers should contact voucherprocessing@tetratech.com. The evaluation includes documentation from the manufacturer regarding their build progress and delivery plan for unredeemed vouchers as well as past delivery performance. 

Vouchers exceeding 100 will remain in the Voucher Processing Center and retain their place in line (by order received) during case by case review, however they will not be accepted until and unless approved by CARB.

If a batch request causes the cap to be exceeded, the quantity of voucher requests in the batch that are below the cap can proceed while the quantity that are above the cap will require case by case review.

Does the manufacturer cap apply to vouchers currently in the Voucher Processing Center?

Yes. Any vouchers currently unredeemed in the Voucher Processing Center for currently eligible technologies count toward the 100-voucher total.

How will I know if a manufacturer's soft cap is reached?

If you are a purchaser, you are encouraged to inquire about a manufacturer’s voucher status from your HVIP-approved dealer.

If you are a dealer, you are responsible for communicating with the manufacturers. Please contact your affiliated manufacturer(s) for an update on their voucher status when planning sales. Totals can also be viewed in the Voucher Processing Center.

How has HVIP modified vehicle classifications and eligibility criteria?

This information can be reviewed in the FY20-21 Funding Plan for Clean Transportation Incentives. In general, Vehicle Catalog and Funding Tables have been streamlined to align with vehicle weight rather than body type or vocation.

Will there be a waitlist?

In support of CARB’s Project 800 effort to deploy class 8 tractors performing port drayage operations, requests for drayage vehicles that exceed the $63 million will remain on a waitlist for funding. Affected parties will be notified during the initial voucher review period which is now underway.

Have voucher amounts changed?

Yes. CARB recognizes that battery size is the largest determinant of battery-electric vehicle cost, therefore HVIP has simplified the voucher tables to one single voucher table based on vehicle weight rating. The incentive amounts are accompanied by voucher modifiers to support unique fleets (public transit and school districts), deployments in disadvantaged communities, as well as costlier technologies. 

Will Class 2b vehicles be funded by HVIP? Is there an incentive amount for these trucks?

Class 2b vehicles intended exclusively for commercial use can be funded by HVIP. An incentive amount will be established by CARB in consultation with manufacturers when vehicles enter the market.

How is Drayage defined for the purposes of the Early Adopter incentive?

In order to qualify for the $150,000 voucher amount, instead of the standard Class 8 voucher amount of $120,000, fleets / purchasers must either:

  • Have had at least one vehicle listed in the California Air Resources Board Drayage Truck Registry (DTR) in 2020 or earlier, or
  • Submit a copy of your fleet’s permission to enter a port or railyard, to voucherprocessing@tetratech.com within 30 days of the voucher request. Acceptable documentation includes UIIA Authorization, concession agreements, or other forms of drayage operations permissions.   

Drayage trucks are: Any in-use on-road vehicle with a (GVWR) greater than 26,000 pounds that is used for transporting cargo, such as containerized, bulk, or break-bulk goods, that operates on or transgresses through a port or intermodal railyard property for the purpose of loading, unloading or transporting cargo, including transporting empty containers and chassis or off port or intermodal railyard property transporting cargo or empty containers or chassis that originated from or is destined to a port or intermodal railyard property.

Drayage trucks are not: Vehicles operating off of port or intermodal railyard properties that transport cargos that have originated from a port or rail yard property but have been off-loaded from the equipment (e.g., a trailer or container) that transported the cargo from the originating port or rail yard or Vehicles operating off of port or intermodal railyard properties that transport cargos that are destined for a port or rail yard but will be subsequently transferred into or onto different equipment (e.g., a trailer or container) before being delivered to a seaport or intermodal railyard.

Has the process for requesting vouchers changed?

The HVIP voucher request and redemption process has not changed substantially from previous years. Dealers are responsible for taking the necessary training to become HVIP approved and request vouchers on behalf of the customer. Purchasers receive the full incentive amount discounted from the sale at the point of purchase. Once the vehicle has been delivered, customer pays, and the voucher is redeemed, the HVIP approved dealer then receives a check from CALSTART for the full voucher amount. Please review the Implementation Manual for more details.

I have unredeemed vouchers. What happens to those vouchers when HVIP opens for new voucher requests?

Unredeemed vouchers currently in the Voucher Processing Center will not be lost/cancelled/voided due to HVIP’s reopening. Current vouchers have secured funds attached to them. 

California Climate Investments

HVIP is part of California Climate Investments, a statewide initiative that puts billions of Cap-and-Trade dollars to work reducing greenhouse gas emissions, strengthening the economy, and improving public health and the environment — particularly in disadvantaged communities.

News & Events


Work Group Meeting to Implement FY 2021-22 Clean Truck and Bus Voucher Incentive Project (HVIP) Recording Available


On January 13, 2022, the California Air Resources Board (CARB) hosted a Webinar/Teleconference work group meeting on the implementation of (…)


California Electric School Bus Working Group Meeting #2 (2/9/22)


The Electric School Bus (ESB) Working Group #2 will be held on Wednesday, February 9, 2022. This working group meeting (…)

The Dealer Training Guide, Implementation Manual and VPC Training Video do a great job in providing all the information needed ... Thanks for the attention to detail in preparing this for us!
Bill Bruss
Sales Manager - National Accounts Houston Freighliner, Inc.

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