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Why State Incentives Matter Now
Washington requires all utilities to offer net metering for systems up to 100 kW. When your panels overproduce, credits are sold back at the retail rate, making it one of the strongest net metering policies in the country.
- Monthly rollover of excess credits
- Annual true-up credits purchased at utility avoided cost
- No separate meter charge — systems up to 100 kW qualify
- Available through PSE, Seattle City Light, Avista, and more
🛒 Sales Tax Exemption
Washington exempts solar energy equipment from state sales and use taxes. On a typical $30,000 system, the 6.5%+ sales tax exemption saves you $1,950+. This alone makes WA installations significantly cheaper than buying in most states.
🏢 Utility Programs
Puget Sound Energy (PSE)
PSE offers net metering, green power programs, and a distributed solar incentive program providing per-kWh payments for production. Incentive rates vary by system size.
Seattle City Light
Seattle City Light offers net metering and has ambitious goals for renewable energy. While they offer less in direct rebates (already one of the lowest rates in the nation), the net metering policy is strong.
Avista Utilities
Avista offers net metering for systems up to 100 kW and various energy efficiency rebate programs for WA customers.
💰 Costs & Payback in Washington
| System Size | Before Incentives | Est. After Incentives | Est. Annual Production | Payback |
|---|---|---|---|---|
| 6 kW | $19,000 | $12,400 | 7,500 kWh | 11-15 yrs |
| 8 kW | $25,500 | $16,700 | 10,000 kWh | 11-14 yrs |
| 10 kW | $31,000 | $20,200 | 12,500 kWh | 10-14 yrs |
Frequently Asked Questions
Is solar worth it in Washington with cloudy weather?
Yes — WA still gets enough sun for solid production. WA's net metering and sales tax exemption improve the math. Clouds reduce production by about 10-15% versus sunny states.
What is the WA sales tax rate I'll save on?
WA's combined state + local sales tax averages 8.5-10.3% depending on your city. That's $2,500-$3,100 saved on a $30,000 system.
Are there rebates for going solar in Seattle?
Seattle City Light doesn't offer direct installation rebates, but their net metering and low baseline rates make solar a long-term win. PSE offers a performance-based incentive.
Does snow damage solar panels?
No. Snow typically slides off tilted panels. In fact, snow reflection can increase production for panels with a clear view.
How long does installation take in WA?
Physical installation is 1-3 days. Total time including permits and utility interconnection is typically 2-4 months.
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