Solar Panel Cost in Wilmington, DE (2026)
Solar panel costs in Wilmington, DE typically run near the Delaware state average. A 6 kW system in Wilmington costs about $18,200 before the 30% federal ITC, with payback around 10.3 years at local utility rates.
Quick answer
In Wilmington, a 6 kW solar panel system costs about $18,200 installed (10.3-year payback). After the 30% federal tax credit, net cost is roughly $12,700. Annual savings: ~$1,210/year at 14.8¢/kWh.
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Estimate for Delaware
$8,300net after 30% ITC
~4 kW · 10 panels · $11,900 before credits · 14.8¢/kWh
Annual savings
$808
Payback
10.3 yrs
25-year savings
$21,224
25-year savings timeline
Includes ~3% utility rate growth & 0.5%/yr panel degradation
Wilmington vs US Average
| Metric | DE | US avg |
|---|---|---|
| 6 kW system (before credit) | $18,200 | $16,271 |
| Net cost after 30% ITC | $12,700 | $11,390 |
| Cost per watt | $0.00/W | — |
| Annual electricity savings | $1,210 | $1,335 |
| Payback period (years) | 10.3 yrs | 9 yrs |
| Electricity rate | 14.8¢/kWh | — |
Updated 2026-07-07. Estimates only.
What affects solar costs in Wilmington?
Wilmington metro solar pricing runs near the Delaware state average, reflecting local labor, permitting, and installer competition. Solar installation costs in Delaware reflect local labor rates, permit fees, and utility interconnection rules. A typical 6 kW system runs $13,860–$24,500 before the 30% federal tax credit, with net cost around $9,700–$17,150.
Wilmington homeowners should compare at least three local quotes specifying panel brand, inverter type, and production guarantee. Delaware averages 14.8¢/kWh and 4.4 peak sun hours per day — moderate solar production potential for rooftop systems.
Utility rules in Delaware affect how solar credits apply to your bill — verify net metering or buyback terms for your specific provider serving Wilmington.
Wilmington solar ROI depends on Delaware electricity rates, local install competition, and roof suitability. Delaware install costs average $2.97/W with estimated 10.3-year payback on a 6 kW system — above US national averages.
Wilmington solar snapshot
- 6 kW system: $14,150 – $25,000
- After 30% ITC: $12,700
- Electric rate: 14.8¢/kWh · Peak sun: 4.4 hrs/day
- Payback: ~10.3 years · Annual savings: ~$1,210
How to maximize solar ROI in Wilmington
- Compare Wilmington installer quotes on cost per watt ($/W)
- Check Delaware incentives — state guide
- Review how to choose installers in Delaware
- Compare at least three installer quotes in Delaware
- Model payback using your actual utility rate and usage
Frequently Asked Questions
How much do solar panels cost in Wilmington?
A 6 kW solar system in Wilmington, DE typically costs $14,150–$25,000 before incentives, or $12,700 after the 30% federal tax credit.
Is solar worth it in Wilmington?
With 14.8¢/kWh electricity rates and 4.4 peak sun hours, Wilmington homeowners often see 10.3-year payback. Use our calculator for your roof and usage.
How does Wilmington compare to Delaware?
Wilmington install pricing is near the state median in Delaware.
Related pages
How We Calculate Solar Costs
MySunROI estimates combine NREL residential PV installed-price benchmarks, EIA state electricity rates, and regional labor modifiers — updated 2026-07-07.
Estimates only. Last updated 2026-07-07. Estimates based on NREL PV cost benchmarks, EIA electricity rates, and 2026 installer pricing surveys.