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.

November 17, 2021

DOE Secretary Granholm marks 1 million Home Performance with ENERGY STAR® national milestone in Delaware Energize Delaware’s highly successful program helps Delawareans save money and increase home comfort. New Castle ­- U.S. Secretary of Energy Jennifer M. Granholm traveled to Delaware to announce that the U.S. Department of Energy’s Home Performance with ENERGY STAR® program…

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November 17, 2021

Children’s Beach House Looking Forward Low-Interest loan helps upgrade to energy-efficient system & lighting. Lewes – The Children’s Beach House (501c3) was recently a recipient of a $462,130 low-interest loan from Energize Delaware to increase the property’s energy efficiency. The need for a new heating system arose as their old system reached the end of its…

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