Solar in Wilmington, DE
With Delmarva Power's electricity at about 20.6¢ per kWh and 1,364 kWh of sun per kW, solar is worth it for a typical Wilmington home today: about a 10.9-year payback.
- Payback, typical home
- 10.9 yrsDelaware: 12.3 yrs
- 25-year net
- $39,141after paying $23,390
- Sun
- 1,364kWh per kW per year
- Electricity
- 20.6¢14% above U.S. average
A typical Wilmington home, by the numbers
| Utility | Delmarva Power |
|---|---|
| Electricity use | 886 kWh a month |
| Best-value system | 7.8 kW, about 18 panels, 10,636 kWh a year (100% of use) |
| Cost | $23,390 |
| First-year savings | $2,099 |
| Payback | 10.9 years |
| Exported power | 17¢/kWh (Delmarva Power) |
Cash purchase, no federal credit, 2.5% yearly rate increases. Run it with your own numbers.
Homes in Wilmington
- Owner-occupied homes
- 48%
- Single-family detached
- 10%
- Median home value
- $231k
- Median year built
- 1946
- Population
- 71,727
- Roofs suitable for solar†
- 66%
Census ACS 2020–2024. †Share of 13,391 buildings Google Project Sunroof rated technically suitable (2019 snapshot).
Older housing stock. Many homes here were built before 1975. Have the roof and electrical panel checked before signing; a roof or panel upgrade can add thousands. Roof first?
Installers working in Wilmington
Public installation records for Delaware don't name installers, so we can't rank local companies here. Browse installers in Delaware.
Always verify the license and get at least three quotes. Compare quotes side by side.
Questions about solar in Wilmington
Is solar worth it in Wilmington, DE?
For a typical home in Wilmington, solar is worth it at 2026 prices: a 7.8 kW system costs about $23,390 after state incentives, saves about $2,099 in year one and pays back in about 10.9 years. Enter your address for an estimate based on your roof and bill.
How much solar power does a system produce in Wilmington?
About 1,364 kWh per year for each kW of panels on a south-facing roof, based on PVWatts and local weather. That's 1% less than the Delaware average. East- or west-facing roofs produce roughly 10–20% less.
Who is the electric utility in Wilmington?
Most homes in Wilmington are served by Delmarva Power, at about 20.6¢ per kWh on average.
How much do solar panels cost in Wilmington?
A fair cash price is around $3.05 per watt before incentives, so about $23,390 for a 7.8 kW system. There's no federal tax credit for homeowners who buy in 2026.
Nearby
- Newark 10.7 yrs
- Dover 13.2 yrs
- All of Delaware
Data: PVWatts (National Laboratory of the Rockies), EIA-861 2025 adjusted to 2026, U.S. Census ACS, LBNL Tracking the Sun, state policy research as of October 2026.