Diesel Replacement Rebate

The Diesel Replacement Rebate (DRR) program will open on October 29, 2021 at 9:00 a.m. (HST).

Potential Applicants are encouraged to attend an informational webinar on October 21 at 9:00 a.m. (HST) prior to applying. This webinar will feature an in-depth presentation on the Diesel Replacement Rebate program, as well as other complimentary programs in Hawaii.

Register in advance for this meeting: https://us06web.zoom.us/meeting/register/tZIqceusqTMiEtEKiDty5LuHgQqI1KJxWNfa

DRR Program Information and Resources


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

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

Review a sample application here: Sample Application

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

Eligible Participants: Public and private organizations within the State of Hawaii with eligible projects are encouraged to apply. State employees and contractors 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 “Make ready” news release.

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.