Green Energy Grant Program – Non-Residential & Non-Profit Solar Hot Water & Geothermal

The non-residential and non-profit solar hot water and geothermal program is jointly run by DNREC and the SEU. This incentive program offers grants to qualified installations of solar hot water and geothermal systems in Delaware based on system sizes.

Note: As of 2/28/2018 we will not be accepting new applications for the non-residential and non-profit solar hot water program. The allotted funding for this fiscal year has been allocated to approved and pending applications. The application portal will re-open if new funding is approved in future fiscal years. 

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This program is open to all non-residential and non-profit solar hot water and/or geothermal customers in Delaware regardless of utility.

The maximum grant is appropriately sized for large systems. For geothermal systems the grants are capped at $200,000 per project or 30% of the total system cost. For solar hot water systems, the grants are capped at $200,000 per project or 20% of the total system cost.

The grants are based on the size of systems:

Solar Hot Water Non-Residential Non-Profit
  ($/OG300 or PE* Calculated kWh Saved) ($/OG300 or PE* Calculated kWh Saved)
SWH Water Heater Only $0.65 $1.00
SWH with Integrated Heating $0.65 $1.00
Maximum Grant $200,000.00 $200,000.00
Geothermal Heat Pumps Non-Residential Non-Profit
EER ≥18/COP≥3.6 Partial Load ($/ton) ($/ton)
First 2 Tons $800.00 $1,000.00
Over 2 Tons $700.00 $800.00
Maximum Grant $200,000.00 $200,000.00
*PE=Licensed Delaware Professional Engineer required if the system is not OG-300 compliant    


  • Projects must meet the technical requirements of the Green Energy Fund Grant Program. Click here to view the regulations of the GEF Program.
  • Solar modules installed for the Solar Hot Water Program must have an azimuth between 90° and 270°.
  • Solar hot water systems must either meet OG-300 certification by the Solar Rating and Certification Corporation (SRCC) or have energy savings calculated by licensed Delaware Professional Engineers.
  • Eligible system size is limited to 80% of the thermal load.
  • Geothermal systems must meet an Energy Efficiency Rating (EER) of at least 18 and a Coefficient of Performance (COP) of at least 3.6.

For further information about the program, please contact the Executive Director, Tony DePrima, at the DE Sustainable Energy Utility at 302-883-3048 or by email at

Learn more about solar hot water and geothermal systems:
US Department of Energy, Solar Water Heaters
US Department of Energy, Geothermal Heat Pumps

The application should be submitted online and approved by the program before the construction process. If a grant for a non-residential or non-profit system is approved, it will be paid directly to the grantee after the completion of the construction.

To begin an application for the program, please click here. This will prompt you to set up an account at After you have set up an account, you can log in here and begin your grant application. Applications can be saved and edited before final submission.

To learn more about the online application steps, watch the video below:

Am I eligible for a Non-Residential or Non-Profit grant if I am not a Delmarva Power Customer?

Yes for solar hot water and geothermal systems. Non-Residential and Non-Profit entities are eligible for the grant program regardless of utility as long as the facility is located in Delaware. Residential systems are only eligible if they are Delmarva Power Customers.

Fund Availability

The total program budget for the DESEU funded solar thermal – geothermal program is $3 Million for FY 18 (July 1, 2017 to June 30, 2018). This budget will be capped for Fiscal Year 2018.

Funds will be allocated to projects on a first come, first serve basis. Verification of your Part 1 application secures grant funding for your project for 1 year from the approval date. After 1 year your grant approval will expire and you will need to re-apply to the program.

No additional funding will be approved for Fiscal Year 2018 once the approved funds have been expended.

The chart below shows the current fund availability. The gold portion represents the funds already allocated through the program (53.5%). The blue portion represents funds for applications with a Part 1 application that has been verified (35.8%). The red portion represents funds that have neither been allocated nor reserved with a Part 1 application (0.7%).