Solar Installation in Wilmington, DE

The cost of a solar system in Wilmington depends on your home’s energy usage, roof size, and complexity. Delaware’s incentive stack significantly reduces the effective cost: the Green Energy Program rebate provides $0.70 per watt up to $6,000, SRECs generate approximately $30 per credit for years 1 through 10, Delmarva Power supports full retail net metering, and Delaware has no state sales tax on equipment. $0-down financing is available, so many homeowners go solar with no upfront cost. A free Sunwise consultation will give you an exact system design and cost breakdown specific to your home. Commercial property owners can also take advantage of the federal Investment Tax Credit through July 4, 2026.

Wilmington issues solar permits through the City’s Department of Land Use and Planning at the Louis L. Redding City/County Building, 800 N. French Street, 3rd Floor. Projects in a city historic district or neighborhood conservation district may require additional preservation review. Sunwise handles the entire permit application and inspection process on your behalf, so you don’t need to visit the building or manage any paperwork.

Yes. Rowhomes and twins are the dominant housing type in Wilmington, and solar works well on them. Neighborhoods like Forty Acres, Little Italy, Cool Spring, and the Triangle are full of attached homes producing solar energy today. System size may be smaller due to roof area, but high-efficiency panels maximize production per square foot. Sunwise designs systems specifically for compact roofs.

Delmarva Power is the sole electric utility for Wilmington, and residential rates have been climbing steadily. The utility has implemented its third base rate increase in five years, with a 7 percent supply cost increase scheduled for June 2026. Solar locks in a fixed energy cost and protects you from continued rate increases.

Wilmington homeowners can access four key Delaware solar incentives: the Green Energy Program rebate ($0.70/watt, up to $6,000), SRECs (~$30/credit for years 1-10, ~$10/credit for years 11-25), full retail net metering through Delmarva Power with an annual payout option, and zero state sales tax on all equipment. Unlike neighboring Pennsylvania, Delaware’s zero sales tax applies to all solar equipment purchases. $0-down financing is also available.

Yes. Much of Wilmington’s housing dates to the late 1800s and early 1900s, and these older homes are excellent solar candidates as long as the roof is in good condition. Sunwise performs a full roof and shade assessment before designing your system. If your roof needs replacement first, we bundle roofing and solar into a single project. Homes in Wilmington’s designated historic districts may need coordination with the city’s preservation review process, though most residential solar installations proceed without issue.