Solar Cost Breakdown for Seattle
Here's what a typical 5.6 kW solar installation costs in Seattle, WA in 2026, based on current market pricing and live utility data from Seattle City Light.
| Cost Item | Amount | Notes |
|---|---|---|
| Gross System Cost (5.6 kW) | $17,800 | Before any incentives |
| Federal ITC (30%) | -$5,340 | Applied to tax return (Form 5695) |
| Net Cost to Homeowner | $12,460 | After federal tax credit |
| Monthly Loan Payment (25yr @ 5.99%) | ~$80/mo | $0 down solar loan |
| Monthly Bill Savings | ~$54/mo | Based on Seattle City Light 11.2¢/kWh |
Solar Production in Seattle
Seattle averages 3.6 peak sun hours per day — moderate for solar energy production. A 5.6 kW system here will generate approximately:
| Timeframe | Estimated Production | Value @ 11.2¢/kWh |
|---|---|---|
| Daily (avg) | 16.1 kWh | $1.81 |
| Monthly (avg) | 484 kWh | $54 |
| Annual | 5,887 kWh | $659 |
| 25-Year Total | 147,168 kWh | $28,000 |
WA Solar Incentives
Homeowners in Seattle, WA can stack multiple incentives to reduce the net cost of solar significantly:
| Incentive | Value | How to Claim |
|---|---|---|
| Federal Investment Tax Credit (ITC) | 30% of system cost = $5,340 | IRS Form 5695 at tax time |
| WA Sales Tax Exemption | Varies | Through installer or WA tax return |
| Property Tax Exemption | Solar value excluded from property tax | Automatic in most WA counties |
| Net Metering (Seattle City Light) | Credit for excess solar exported to grid | Applied automatically to monthly bill |
💡 Total potential savings: Between the 30% federal ITC ($5,340) and state incentives in WA, many Seattle homeowners reduce their net system cost by 35–45% before financing.
Seattle City Light: Your Local Rate
Your Seattle utility provider is Seattle City Light, currently charging 11.2¢ per kWh (source: EIA, June 2026). This rate determines how valuable solar is for your home — higher rates mean faster payback.
US electricity rates have increased an average of 3.4% per year since 2010. If Seattle City Light's rate continues rising, your solar savings will grow each year — meaning real payback is often faster than static estimates suggest.
| Year | Projected Rate | Annual Solar Savings (5.6 kW) |
|---|---|---|
| 2026 (now) | 11.2¢/kWh | $659 |
| 2031 (+5yr) | 13.2¢/kWh | $779 |
| 2036 (+10yr) | 15.6¢/kWh | $921 |
| 2046 (+20yr) | 21.9¢/kWh | $1,287 |
Get Your Exact Seattle Solar Quote
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Calculate My Seattle Solar Cost →Compare Nearby Cities
See how solar costs compare in cities near Seattle: