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.

September 27, 2019

In recognition of the 4th annual national Energy Efficiency Day (EE Day) on Wednesday, October 2, Energize Delaware is joining regional and national organizations, utilities, businesses, universities, and individuals in promoting energy efficiency – the cheapest, quickest way to meet our energy needs, cut utility bills, and reduce pollution. Energy efficiency is also an economic…

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September 10, 2019

Energize Delaware and New Castle County officials today announced the launch of an initiative that will allow commercial and industrial property owners to finance energy efficient and clean energy projects that will lead to significant savings. Projects that qualify under the statewide Delaware Property Assessed Clean Energy (D-PACE) program will be financed through a voluntary assessment…

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