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.

January 10, 2022

Home Performance with ENERGY STAR® Energize Delaware’s Home Performance with ENERGY STAR® (HPwES) program has assisted over 10,000 Delawareans improve their energy efficiency. Annually participants receive an average incentive of $1481 per project and save an average of $300 on their energy bills. Combined, those Delawareans save over $3 million annually on energy costs. How…

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January 7, 2022

Energize Delaware is pleased to announce the hiring of Traci Evans as their Office Manager. Traci joins the team with almost ten years of energy industry experience. We are so happy to have Traci on board, she has the knowledge and skills to hit the ground running and will add to our capacity to get…

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