Is Plug-In Solar Legal in Washington?
Low rates, gray area Avg rate ~11¢/kWh
Last verified: June 14, 2026 · source data
Quick answer: Plug-in (balcony) solar is legal to install in Washington, but there is no plug-in-specific state law as of June 2026 — it falls under your utility’s standard interconnection rules. Average residential electricity rate is around 11¢/kWh. Confirm wattage limits with your utility before buying.
Thinking about installing? See our best plug-in solar kits for 2026 and estimate your yearly savings.
Among the lowest U.S. electricity rates, so payback is slower. No specific plug-in rules; check your utility.
Before you buy in Washington
Call your electric utility and ask: (1) do they allow small plug-in / behind-the-meter grid-tied solar, and (2) is any notification or interconnection form required? Stay within the wattage they specify, use a UL-listed microinverter, and keep written confirmation.
Then estimate your numbers with our savings calculator (pre-loaded with Washington's rate).
Ready to start? Compare the top kits for your home in our Best balcony solar kits 2026 guide →
Nearby states: Oregon · Idaho · Alaska · see the full 50-state tracker.
Status last reviewed 2026-06-14. Plug-in solar law is evolving quickly — verify current Washington rules and your utility's policy directly. Informational, not legal advice.