Solar panels in Washington: cost, incentives, and quotes
A typical residential solar system in Washington costs $18,000–$24,000 installed in 2026. The 30% federal Section 25D residential tax credit ended December 31, 2025. Washington averages approximately 3.0–4.5 hrs/day of peak sun per day and electricity rates of ~$0.10/kWh. Average payback typically runs 12–17 years depending on system size and available state and utility programs.
Solar incentives in Washington
Federal credit status (post-OBBBA, 2026 forward)
The 30% federal residential solar tax credit (Section 25D) ended December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). For solar systems placed in service after that date, customer-owned installations (cash or loan) receive no federal credit. The commercial Section 48E credit remains available through 2027-2030 deadlines for third-party-owned systems (leases and PPAs); the installer typically passes some benefit through as lower monthly payments. Consult a qualified tax advisor about how the current rules apply to your specific situation.
State and Utility Incentives
Washington may offer additional incentives including net metering, state tax credits, rebates, and property or sales tax exemptions. Verify current programs with a local installer and your utility before making a purchase decision.
Incentive details change. Verify current rules with your installer or a qualified tax advisor before making financial decisions.
Frequently asked questions about solar in Washington
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