Solar Panel Cost in Seattle, WA
Average solar installation in Seattle costs $41,216 before tax credits ($28,851 after 30% ITC). Seattle gets 3.8 peak sun hours/day.
Seattle 7kW System
$41,216
$28,851 after 30% ITC
Peak Sun Hours
3.8 hrs/day
Moderate solar potential
Est. Payback Period
16 years
at avg electricity rates
Solar Panel Cost in Seattle by System Size — 2026
| System Size | Before ITC | After 30% ITC |
|---|---|---|
| 5 kW (small home) up to 600 kWh/mo | $29,263 | $20,484 |
| 7 kW (average home) 700–900 kWh/mo | $41,216 | $28,851 |
| 10 kW (large home) 900–1,200 kWh/mo | $58,939 | $41,257 |
| 12 kW (very large) 1,200+ kWh/mo | $70,479 | $49,335 |
Prices include equipment, installation, and permitting for Seattle. ITC applies as a dollar-for-dollar federal tax credit.
Is Solar Worth It in Seattle? A 2026 Analysis
Seattle Solar Resource
Seattle receives 3.8 peak sun hours per day on average. This is slightly below the US average of 4.7 hours. Solar can still make financial sense in Seattle — you may need a slightly larger system to offset your electricity usage.
Washington Net Metering
Net metering policy determines how much your utility pays for excess solar power. Washington's net metering rules directly affect your financial return in Seattle. Full retail credit (what you pay per kWh = what you receive for exports) maximizes savings. Some utilities have reduced or eliminated net metering — check with your local utility before purchasing.
Financial Projections for Seattle
A typical 7 kW solar system in Seattle at $28,851 (after ITC) saves approximately $1,800/year at average electricity rates. That's a 16-year payback period. Over 25 years, the system generates roughly $16,149 in net savings above system cost.
Get Free Solar Quotes in Seattle
Compare Seattle solar installers and save an average of $3,000–$8,000 by getting competing bids.
FAQs — Solar Panels in Seattle
The average solar panel installation in Seattle, Washington costs $41,216 for a typical 7 kW system. After the 30% federal Investment Tax Credit (ITC), the net cost is $28,851. With 3.8 average peak sun hours per day, Seattle has moderate solar potential.
Solar is still viable in Seattle with 3.8 peak sun hours/day. At average electricity rates, a properly sized system typically pays back in 16 years and generates savings over a 25-year lifespan. Check Washington's net metering policy — full retail credit makes solar significantly more valuable.
Seattle solar owners can access: 1) Federal 30% Investment Tax Credit (through 2032) — saves $12,365 on a typical system; 2) Washington state incentives — check your state's database for additional credits and rebates; 3) Local utility rebates — contact Seattle's utility provider; 4) Net metering — get credit for excess power sent to the grid.
In Seattle with 3.8 peak sun hours/day, a home using 900 kWh/month needs approximately 10 solar panels (400W each) — about a 4 kW system. Your solar installer will size the system based on your actual utility bills and roof conditions.
To find a trustworthy solar installer in Seattle: verify WA contractor licensing, check NABCEP certification (the gold standard for solar installers), read Google and BBB reviews, get at least 3 quotes, and use EnergySage's marketplace — it connects you with pre-screened Seattle installers competing for your business, which typically saves $3,000–$8,000 vs. going direct.