Diesel Replacement Rebate

The Diesel Replacement Rebate (DRR) program opened on October 29, 2021 at 9:00 a.m. (HST). The program started accepting applications under updated guidelines on February 7, 2022.

Please submit your application by clicking here

or copy and paste the following URL: https://energy.hawaii.gov/drr-application



DRR Program Information and Resources

Available Funds:
Approximately $2.1M will be available for program rebates

Rebates are worth up to 45% of project cost.

The Diesel Replacement Rebate (DRR) provides rebates towards the purchase of a new battery-electric vehicle to replace an existing diesel vehicle. Participants are required to scrap the existing vehicle.  Please note that participants are responsible for scrappage costs. 

DRR program information can be found in the program guide: Program Guide

Potential applicants are strongly encouraged to thoroughly read the Program Guide prior to applying.


A pre-application webinar was hosted on October 21st, you can view a recording  by clicking here.

Review a sample application here: Sample Application


Eligible Participants: Public and private organizations within the State of Hawaii with eligible projects are encouraged to apply. State employees are not eligible.

Funds will be reserved for eligible projects on a first come, first served basis.

Vehicle types:

  • School buses
  • Transit, Shuttle, and Tour Buses
  • Medium- or heavy-duty trucks

Replacement vehicle: Must be battery-electric

For a detailed description of vehicle eligibility, see page 3 of the program guide

Charger: Projects can include the purchase of one charging unit per vehicle.

Process Overview:

  1. Organization submits project application
  2. Funds are reserved if project is eligible
  3. Participant signs Agreement and begins project
  4. Participant received the new vehicle
  5. Old vehicle is scrapped
  6. Participant provides final documentation and receives rebate

For Process details, please read the program guide.

For questions, contact Sage Lang at [email protected]

About DRR

The DRR program provides rebates for the replacement of medium- and heavy-duty diesel vehicles with new, battery-electric equivalents. Presented by the Hawaii State Energy Office in partnership with the Hawaii Department of Health, the DRR is funded by the Volkswagen Environmental Mitigation Trust, and the Diesel Emissions Reduction Act.

Hawaii has a goal of a net-negative  carbon economy as soon as practicable but no later than 2045. This goal is supported by Hawaii’s objective to increase energy security and self-sufficiency by planning for the reduction and ultimate elimination of Hawaii’s dependence on imported fuels for electrical generation and ground transportation.

In 2020, Hawaii joined with 14 other states and the District of Columbia as signatories to the Multi-State Medium- and Heavy-Duty Zero Emission Vehicle Memorandum of Understanding (MOU) which, among other things, is an agreement to strive to make sales of all new medium- and heavy-duty vehicles in their jurisdictions zero emission vehicles by no later than 2050. To ensure adequate progress toward the MOU 2050 goal, the signatory states aspire to make at least 30 percent of all new medium- and heavy-duty vehicle sales in their jurisdictions zero emission vehicles by no later than 2030.

The Diesel Replacement Rebate is one way that Hawaii is supporting its community and encouraging the transition to zero-emission vehicles.

Other programs you may be eligible for:

Make Ready Pilot, offered by Hawaiian Electric:
Pilot program allows Hawaiian Electric to design, build, own, and maintain make-ready infrastructure up to a point of connection with the customer’s charging equipment. Expected launch is early 2022. For more information, visit  Hawaiian Electric’s Charge Up eBus Website.

Charging Station rebates, offered by Hawaii Energy: Hawaii Energy is offering up to $35,000 per networked DC fast charging station.  For more information, visit Hawaii’s Energy’s Electric Vehicle Charging Stations.