DIESEL REPLACEMENT REBATE PROGRAM APPLICATION

Please submit one application per project. Applicants with multiple projects may submit multiple applications. Refer to the program guidelines below for program requirements.
Note on Program Guide
The current Program Guide reflects Year 3 of the DRR program. An updated guide reflecting the program’s extension through 2028 is pending. The technical requirements and eligibility criteria remain the same; only program dates and related administrative details will be revised. Applicants may continue to use the existing guide until the updated version is posted.

DRR Program Guidelines

Required Documents

Vendor Quote(s): Applicants will be required to submit a vendor quote for the vehicle (and charger, if applicable). The quote(s) should be dated and include a complete breakdown of all material costs as applicable: vehicle, hardware, warranty costs, freight or shipping costs, installation costs, setup fees, and the sales tax with the percentage rate indicated.
Project Details Excel File: Applicants must submit a Project Details excel file at the time of application. This can be filled out in excel and uploaded with the application. Download a template by clicking here

If you are having an issue uploading documents, please email the documents to [email protected]v after submitting your application.

Diesel Replacement Rebate Application – Open Through 2028

Please note that project information may be shared with all funding parties.
Applicant Information
Organization Name*
Organization Type*
Applicant Business Address*
Street Address Address Line 2 City State / Province / Region ZIP / Postal Code Country
Applicant Mailing Address (if different)
Street Address Address Line 2 City State / Province / Region ZIP / Postal Code Country
Primary Contact Name*
First Last
Title*
Primary Contact Phone*
Primary Contact Email*
Secondary Contact Name
First Last
Title
Secondary Contact Phone
Secondary Contact Email
Signatory for your organization*
This is the person who will sign all documents on behalf of your organization. This can be either your primary or secondary contact, or someone else at your organization. They will receive documents via Adobe Sign
First Last
Signatory's title*
Signatory's email*
This organization is submitting multiple applications*
- Yes
- No
If yes, please indicate number of applications here:
Ex. “Application 1 of 2” or “Application 2 of 2”
Existing Vehicle
Please complete one application per vehicle being replaced.
Vehicle Type*
- School Bus
- Transit Bus
- Medium/Heavy Duty Truck*
- Shuttle Bus
- Tour Bus
- Nonroad Vehicle: Agricultural Tractor
- Nonroad Vehicle at a Port*
- Nonroad Vehicle at an Airport*
*please indicate the vehicle's function
Manufacturer*
Vehicle Model*
Model Year*
Type of fuel (must be diesel)*
- Diesel
- Other
MPG*
Gross Vehicle Weight Rating (GVWR)*
Vehicle Weight Class*
Class 5 (16,001 -19,500 lbs GVWR); Class 6 (19,501 -26,000 lbs GVWR); Class 7 (26,001 -33,000 lbs GVWR); Class 8 (33,001 lbs GVWR and over)
If applying for a School Bus, indicate type below:
- A
- B
- C
- D
Estimate Years of Remaining Life*
Remaining life is the fleet owner’s estimate of the number of years until the unit would have been retired from service if the unit were not being upgraded or scrapped because of the grant funding. The remaining life estimate is the number of years of operation remaining even if the unit were to be rebuilt or sold to another fleet. The remaining life estimate depends on the current age and condition of the vehicle at the time of upgrade, as well as things like usage, maintenance, and climate.
Estimate miles traveled per year*
For on-highway vehicles
Is the existing vehicle fully operational? Operational vehicles must be able to start, move, and have all parts necessary to be operational.*
- Yes
- No
Does the applicant currently own and operate the existing vehicle in the State of Hawaii?*
- Yes
- No
Did the applicant own and operate the existing vehicle during the two-year period prior to application?*
- Yes
- No
Vehicle Area of Operation: Island*
Vehicle Area of Operation: Primary City (if applicable)
The existing vehicle is in current and regular service*
- Yes
- No
If you answered "no" to the question above, please explain
Engine Tier
For Nonroad Vehicles Only
Engine Horsepower
For Nonroad Vehicles Only
Operating Hours Per Year over the last two years
Nonroad Vehicles Only
Replacement Vehicle
Please read the Program Guide for to ensure replacement unit qualifies for funding.
Vehicle Type*
- School Bus
- Transit Bus
- Medium/Heavy Duty Truck*
- Shuttle Bus
- Tour Bus
- Nonroad Vehicle: Agricultural Tractor
- Nonroad Vehicle at Port
- Nonroad Vehicle at Airport
* please indicate the vehicle's function
If applying for a School Bus, indicate type below:
- A
- B
- C
- D
Manufacturer*
Vehicle Model*
Model Year*
Is this the most recent model year available?*
- Yes
- No
Gross Vehicle Weight Rating (GVWR)*
Vehicle Weight Class*
Type of fuel*
- Battery Electric
- Hydrogen
MPG equivalent*
Engine Tier
For Nonroad Vehicles Only
Engine Horsepower
For Nonroad Vehicles Only
Is this vehicle a retrofit? (vehicle must not be a retrofit)*
- No
Quoted Cost of new vehicle*
Upload dated dealer quote
The quote(s) should be dated and include a complete breakdown of all material costs as applicable: vehicle, hardware, warranty costs, freight or shipping costs, installation costs, setup fees, and the sales tax with the percentage rate indicated.
Drop files here or

Max. file size: 100 MB.
Upload additional features list, if applicable.
Replacement vehicles should resemble the original in form and function. Additional features may be added at owner’s expense. Please list all additional and optional equipment or attachments separately in a line item format.
Drop files here or

Max. file size: 100 MB.
If you plan to purchase an EV charger to accompany the battery-electric vehicle, please fill out the following. This will be part of overall project value.
Please review the BABA eligibility information in the program guide. BABA-eligible chargers are not eligible for funding.
Charger Brand
Charger Model
Charger level
Charger output power (kW)
Charger address once installed
Street Address Address Line 2 City State / Province / Region ZIP / Postal Code Country
Vendor Quoted Price
Upload Vendor Quote
Drop files here or

Max. file size: 100 MB.
Is this charger Build America Buy America (BABA) eligible?*
A charger is required to meet Build America Buy America requirements if it supports a vehicle that serves a public purpose, or is otherwise publicly owned or available. For more information see the Program Guide or the BABA website: https://www.epa.gov/cwsrf/build-america-buy-america-baba
- Yes, I understand that the charger is not eligible for funding through DRR
- no
BABA check
Please check the box if any of the following apply to your project. If the answer is yes to any of the following questions, BABA requirements apply to the charger:
- This charger publicly owned (e.g. owned by state or local government agency)
- This charger will be available for use by the public
- This charger will support a vehicle that serves a public function (e.g. a school bus or public transit bus)
Project Details
Upload the project details
Project Details Template can be found on the DRR homepage at https://energy.hawaii.gov/DRR Project details must be filled out in excel and uploaded with the application
Drop files here or

Max. file size: 100 MB.
Total project cost (vehicle and charger)*
Are you planning to apply (or have you already applied) for the Hawaii Energy charger rebate?*
- Yes
- No
If yes, what is your expected rebate?
The maximum rebate available is 45% of total eligible costs. Applicants must provide a minimum of 55% cost match. The cost match cannot include funding from federal sources. Please describe the proposed source of match funds:*
Please describe the steps your organization is taking to procure this vehicle, including proposed timeline and expected delivery date.*
The deadline for project completion is September 30, 2026. Extensions are possible but not guaranteed.
By clicking submit you attest that all information you have provided herein is true and complete

DIESEL REPLACEMENT REBATE PROGRAM APPLICATION

Required Documents

Diesel Replacement Rebate Application – Open Through 2028

Applicant Information

Existing Vehicle

Replacement Vehicle

If you plan to purchase an EV charger to accompany the battery-electric vehicle, please fill out the following. This will be part of overall project value.

Project Details