Affordable energy loans and rebates. That's a win-win.”

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Delaware Sustainable Energy Utility (DESEU) is who we are—a nonprofit 501(c)(3) organization created by the State of Delaware. Through our many Energize Delaware programs, we help residents, businesses, farmers, schools, religious organizations, nonprofits, hospitals and local governments save money. We do it by providing access to high-efficiency heating, cooling, ventilation and insulation technologies at little or no cost.

Making Homes More Comfortable and Affordable.

Our programs help improve your home’s coziness and safety while reducing its energy consumption. In-home energy audits identify exactly what’s needed—from new insulation, windows or doors to higher-efficiency appliances and HVAC equipment. All to make your home more comfortable and affordable.

See our residential programs

Improving Bottom Lines For Businesses, Government and Nonprofits.

We also help companies, governments, nonprofits and faith-based organizations save energy and money. We provide commercial-grade energy audits and recommendations, revolving loan and energy investment funds, grants for clean solar and geothermal energy, and other initiatives.

See our nonresidential programs

Our Valued partners.

Energize Delaware partners with utilities, public-advocacy and community-action groups, and other organizations. Together, we offer our programs to people statewide to help protect against volatile energy prices, reduce the environmental impact of energy production and lead Delaware to a sustainable energy future.

Our Partners

The latest on energize delaware news and initiatives.

February 26, 2021

In just its third year of providing loan services, the Energize Delaware Residential Energy Efficiency Loan Program (REELP) has reached the significant milestone of granting over $1 million in qualified loans to Delaware homeowners.  The Residential Energy Efficiency Loan Program provides low-interest loans to credit-qualified Delaware homeowners of a single-family or duplex property to encourage the…

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February 22, 2021

Energize Delaware is excited to announce the launch of their Virtual Home Energy Assessment. This online tool is designed to provide Delawareans with a quick and easy method to virtually determine if their home could benefit from energy efficiency upgrades. After entering basic information about their home and energy usage habits, the customer is provided…

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