Going solar in Washington still comes with real savings. Here’s what applies today — and what changed in 2025.
Eliminates sales tax, typically about 10% depending on local rates, for most residential solar systems. Applies to systems of at least 1 kW and no more than 100 kW AC, with installation starting no earlier than July 1, 2019, and completed by December 31, 2029.
Excess energy sent to the grid is credited on your bill at the full retail rate. Currently, there is no expiration.
the federal residential tax credit for customer-owned solar and battery storage expired after December 31, 2025. Residential battery systems installed in 2026 or later are generally no longer eligible for the former 30% Residential Clean Energy Credit. Certain commercial solar and battery storage projects may still qualify. Consult a tax advisor.
Incentives change. This is general information, not tax advice — confirm eligibility with a tax professional.
According to the National Renewable Energy Laboratory (NREL), your home value increases by $20 for every $1 you save on energy bills. For example, a system that saves $700 per year would increase home value by $14,000.