Solar Panel Cost in Washington (2026)
Solar panel costs in Washington depend on system size, roof type, local labor rates, and your utility's net metering rules. In Washington, a typical 6 kW residential system runs $14,410–$25,410 before incentives, with 30% federal tax credit reducing net cost to about $10,090–$17,790. Average electricity rate: 11¢/kWh.
Quick answer
In Washington, a 6 kW solar panel system costs about $18,480 installed (15.8-year payback). After the 30% federal tax credit, net cost is roughly $12,940. Annual savings: ~$820/year at 11¢/kWh.
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Estimate for Washington
$8,600 net after tax credit
~4 kW system · $12,300 before 11¢/kWh incentives
Annual savings
$546
Payback
15.8 years
30-year savings
$14,742
Washington vs US Average
| Metric | WA | US avg |
|---|---|---|
| 6 kW system (before credit) | $18,480 | $16,271 |
| Net cost after 30% ITC | $12,940 | $11,390 |
| Cost per watt | $3.08/W | — |
| Annual electricity savings | $820 | $1,335 |
| Payback period (years) | 15.8 yrs | 9 yrs |
| Electricity rate | 11¢/kWh | — |
Updated 2026-07-07. Estimates only.
What affects solar costs in Washington?
- Installer pricing in Washington averages $3.08/watt — above the US median
- 4 peak sun hours/day drives production and payback speed
- Federal Investment Tax Credit (ITC) covers 30% of system cost through 2032 for qualifying homeowners
- Washington utility rates at 11¢/kWh affect monthly bill savings
Solar installation costs in Washington reflect local labor rates, permit fees, and utility interconnection rules. A typical 6 kW system runs $14,410–$25,410 before the 30% federal tax credit, with net cost around $10,090–$17,790.
Washington averages 11.0¢/kWh and 4.0 peak sun hours per day — moderate solar production potential for rooftop systems.
Incentives in Washington
Washington homeowners may qualify for the 30% federal ITC plus any active state or utility rebates. Verify current programs at dsireusa.org before signing a contract.
How to maximize solar ROI in Washington
- Compare at least three installer quotes in Washington
- Model payback using your actual utility rate and usage
- Ask whether net metering or buyback rates apply in your utility territory
- Confirm ITC eligibility with a tax professional
Washington install costs average $3.08/W with estimated 15.8-year payback on a 6 kW system — above US national averages.
Cost snapshot — WA
- 6 kW system
- $14,410 – $25,410
- After 30% tax credit
- $10,090 – $17,790
- Annual savings
- $670 – $940
- Battery add-on
- $7,560 – $13,610
Frequently Asked Questions
How much do solar panels cost in Washington?
A 6 kW solar system in Washington typically costs $14,410–$25,410 installed. After the 30% federal tax credit, net cost is about $10,090–$17,790. Cost per watt ranges from $2.62–$3.63.
What is the solar payback period in Washington?
In Washington, estimated payback is 11.7–22.2 years for a 6 kW system, with an average around 15.8 years. Higher electricity rates and sun exposure shorten payback.
How much can I save on electricity in Washington?
A 6 kW system in Washington may save $670–$940 per year on electricity, depending on usage, shading, and net metering. Over 25–30 years, cumulative savings can reach $16,750–$28,200.
Is solar worth it in Washington in 2026?
Solar in Washington is worth evaluating if you pay 11¢/kWh or more, have a south-facing roof with minimal shade, and plan to stay in your home past the payback period (~15.8 years). Use our calculator for a personalized estimate.
Related solar resources
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.
Solar cost in Washington cities
Estimates for informational purposes only. Last updated 2026-07-07. Estimates based on NREL PV cost benchmarks, EIA electricity rates, and 2026 installer pricing surveys.