Solar Panel Cost in Washington
Average costs, savings estimates, and incentives for Washington homeowners — plus free installer quotes.
Solar in Washington: Overview
Washington homeowners who go solar can expect to pay around $25,000 for a typical 8.3 kW system before incentives. Note: the 30% federal residential solar tax credit expired December 31, 2025. State and local incentives may still reduce your net cost.
With average annual electricity savings of $1,000, the typical payback period in Washington is 17.5 years. Over 25 years, that represents a return on investment of approximately $7,500.
Washington's sun score of 57/100 reflects the region's solar irradiance. The state also offers Sales tax exemption, which can further reduce your upfront costs.
Solar Incentives in Washington
Expired December 31, 2025 — no longer available for new residential installs
State-specific program for Washington residents
Many states exempt solar from property tax assessments
Sell excess power back to the grid at retail rates
Frequently Asked Questions — Solar in Washington
How much do solar panels cost in Washington?
The average solar installation in Washington costs approximately $25,000 before incentives. Note: the 30% federal residential solar tax credit expired December 31, 2025. State and local incentives may still apply in your area. Prices vary by system size, installer, and equipment quality.
How much can I save with solar in Washington?
Washington homeowners save an average of $1,000 per year on electricity with solar. Over 25 years, that's a potential return of $7,500 after accounting for your net system cost.
What solar incentives are available in Washington?
Washington offers Sales tax exemption. Note: the federal 30% residential ITC expired December 31, 2025. Check with your utility company for additional rebates and state programs.
How long is the solar payback period in Washington?
Based on average costs and savings, the typical payback period in Washington is approximately 17.5 years. After payback, your solar panels continue generating free electricity for 15–20+ more years.
Is solar worth it in Washington?
With a sun score of 57/100 and average annual savings of $1,000, solar is a good investment in Washington. The Sales tax exemption further improves the economics.