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Plug-in solar lets anyone generate free electricity — no roof, no permit, no contractor. A single panel on your balcony can meaningfully cut your bill, especially as rates keep rising.

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Washington

Not yet legalUpdated May 30, 2026

Washington has relatively low electricity rates due to abundant hydropower, which reduces the immediate economic case for plug-in solar. However, the state's clean energy goals and growing interest from renter advocates could drive future legislation.

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Recently updated — this page was last reviewed on May 30, 2026. Law data is current as of that date.

What Your Savings Would Look Like

Based on Washington's $0.110/kWh avg. rate and 4 sun hours/day. Plan ahead — laws can change quickly.

Default: 4h/day (Washington avg)
$1,200
$900$2,200
800W
400W2400W
60%
30%100%
$0.110/kWh
$0.080/kWh$0.400/kWh
Rate Escalation Scenario
Year 1 Generation
596 kWh
50 kWh/mo
Year 1 Savings
$66
$5/mo
Payback Period
15 yrs
by year 15
25-Year Savings
$2,545
net $1,345
ℹPanels typically last 25–30 years with a 25-year output warranty. Microinverters carry a 10–25 year warranty depending on brand. Battery modules degrade faster — expect 10–15 years before capacity drops below 80%. The 25-year savings figure above assumes the panel and inverter run for the full window; budget ~$200–$400 for an inverter swap around year 15 if needed.
Cumulative Savings vs. Break-even ($)
Selected scenario2% escalation8% escalationBreak-even
Calculator AssumptionsSavings estimates are projections based on average sun hours, self-consumption assumptions, and rate escalation scenarios. Actual results vary by roof orientation, shading, usage patterns, and local rate schedules. The federal ITC for residential solar expired December 31, 2025.

Electricity Cost Trend

↑ 4.0%/yr avg — Moderate
Rates up 22% over the past 5 years
From $0.090/kWh in 2021 → $0.110/kWh today. Every year you delay solar, your bills compound.
4.0%
avg. annual increase
Historical avg. residential rate ($/kWh)
$0.090
2021
$0.094
2022
$0.098
2023
$0.102
2024
$0.106
2025
$0.110
2026
20-year projected rate
$0.241/kWh
at 4.0%/yr escalation
Extra you'll pay over 20 yrs*
$1,076
vs. today's rates (1,000 kWh/mo household)
Best time to go solar
Now
Each year of delay = a year of higher grid bills

What a Washington Law Could Look Like

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Based on neighboring states

Utah (1,200W), Maine (600W), and Virginia (1,000W pending) provide the template. A Washington law would likely allow 600–1,200W systems to plug into standard household outlets — no permit required.

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High rates = strong economics

At Washington's avg. $0.110/kWh, a 600W system generating ~880 kWh/year saves roughly $97/year. Payback in as few as 8 years at current rates.

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Renters and condo owners

Plug-in solar requires no permanent installation — just an outlet. This makes it uniquely accessible to renters and condo owners who can't get rooftop solar.

Stay in the Loop

We monitor all 50 state legislatures. The moment Washington files a plug-in solar bill, you'll be the first to know.

Legal DisclaimerLaws change. Information on this site reflects our best understanding of current statutes as of the date shown. It is not legal advice. Verify requirements with your state utility commission, local building department, and a qualified attorney before installation.