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: Beginning 9/16/2017 the grant amount for non-residential solar hot water systems dropped to $0.65 per calculated kWh saved. The grant amount for non-profit solar hot water systems dropped to $1.00 per calculated kWh saved. All Part 1 applications submitted prior to 9/16/2017 received the old incentive rates.

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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 both solar hot water and geothermal systems, the grants are capped at $200,000 per project or 30% 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    

Note: Grants for solar hot water systems cannot exceed 30% of the project cost. All solar hot water grants will be capped at 30% of the system cost. 

  • 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.