Solar Panel Cost in Seattle, WA
Updated 2026 guide to solar panel prices, savings, and payback period in Seattle.
Estimated Solar Savings
Solar Panel System Costs in Seattle, WA
Below are estimated costs for different solar panel system sizes in Seattle, including the 30% federal solar tax credit.
| System Size | Cost Before Incentives | Federal Tax Credit (30%) | Net Cost | Est. Annual Production |
|---|---|---|---|---|
| 4 kW | $11,400 | -$3,420 | $7,980 | 5,256 kWh |
| 6 kWMost Popular | $17,100 | -$5,130 | $11,970 | 7,884 kWh |
| 8 kW | $22,800 | -$6,840 | $15,960 | 10,512 kWh |
| 10 kW | $28,500 | -$8,550 | $19,950 | 13,140 kWh |
| 12 kW | $34,200 | -$10,260 | $23,940 | 15,768 kWh |
What Affects Solar Panel Cost in Seattle?
The average cost of solar panels in Seattle, WA is approximately $285/watt before incentives. For a typical 6kW residential system, that means a total cost of about $17,100 before the federal tax credit.
After applying the 30% federal Investment Tax Credit (ITC), your net cost drops to approximately $11,970.Seattle homeowners typically see a payback period of 9 years and save an estimated $27,000 over 25 years.
Factors that affect your cost in Seattle:
- System size: Larger systems cost more but have a lower cost per watt
- Equipment quality: Premium panels and inverters cost more but offer better efficiency
- Roof complexity: Steep roofs, multiple levels, or shading can increase installation costs
- Local labor rates: Installation costs vary within the Seattle metro area
- Local permits: Permitting costs and requirements vary by municipality in Seattle
- Incentives: State and local programs can significantly reduce your out-of-pocket cost
Solar Incentives Available in Seattle
Federal Solar Investment Tax Credit
30% Federal Tax Credit (ITC)
Washington homeowners can claim the 30% federal ITC. With no state income tax, the federal credit is the primary tax benefit.
State & Local Incentives
Sales Tax Exemption
Sales TaxWashington exempts solar energy systems from the state's sales and use tax.
Washington State Clean Energy Transformation Act
Net MeteringWashington's clean energy policies support net metering and distributed solar generation.
Net Metering
Washington requires utilities to offer net metering for residential solar systems up to 100 kW. Customers receive credits at the full retail rate.
AvailableSRECs
Washington's previous solar production incentive program has ended. The state now relies on net metering and the federal ITC as primary solar incentives.
Not AvailableGet Your Free Solar Quote
No obligation • Compare top installers
Ready to go solar?
Get free quotes from top installers in your area
Top Solar Companies in Seattle, WA
Affordable Solar Roof & Air
Solar Panel Cost FAQ - Seattle, WA
The average cost of solar panels in Seattle is approximately $2.85 per watt before incentives. A typical 6kW residential system costs about $17,100 before the 30% federal tax credit, bringing the net cost to around $11,970.
The typical payback period for solar panels in Seattle is approximately 9 years. After that, you'll enjoy free electricity for the remaining 15-20+ years of your system's life, saving an estimated $27,000 over 25 years.
Seattle homeowners can take advantage of the 30% federal solar tax credit, which reduces your system cost by 30%. Washington also offers net metering, and various state-level incentive programs. Check our incentives page for the complete list.
Seattle homeowners can save an estimated $27,000 over 25 years by going solar. Actual savings depend on your electricity usage, system size, roof orientation, and available incentives. With electricity rates averaging $0.11/kWh in Washington, solar provides significant long-term savings.
Solar Costs in Other Washington Cities
Start Saving with Solar Today
Join thousands of homeowners who've switched to clean energy
Get Your Free Quote