Solar Panel Cost in Washington (2026)
Installed solar in Washington runs about $2.75 per watt — roughly 7% above the national average of $2.58/W. With the federal residential tax credit (25D) gone as of 2026, payback here rests on a $0.14/kWh power price and 3.7 daily peak sun hours.
Worked example: a typical $150/month home in Washington
A $150/month electric bill in Washington works out to about 13,043 kWh a year. Sizing a cash-purchase system to cover 100% of that:
Last updated June 30, 2026
Washington solar numbers
- Installed price
- $2.75 / watt
- Electricity price
- $0.14 / kWh
- Peak sun hours
- 3.7 hrs/day
- State incentive
- 0%
- Net-metering value
- 100% of retail
$/W: industry pricing surveys · electricity: U.S. EIA, 12-month average through April 2026 · sun hours: NREL.
Local context: The cheapest power in the country and low sun make Washington one of the slowest solar paybacks.
Estimate your own Washington system
Adjust the bill, ownership, and battery options below — it's pre-set to Washington's pricing and sun hours.
Monthly shape modeled with NREL PVWatts® v8 (NSRDB 2020 TMY) — updated July 18, 2026.
Electricity 13.8¢/kWh — U.S. EIA, 12-month average through April 2026.
Data: U.S. EIA · OpenEI URDB · Google Solar · NREL PVWatts · DSIRE · IRS · ENERGY STAR · industry surveys — see all sources