Washington
Washington Solar & EV Incentives 2026 — Sales Tax Exemption & Net Metering
Washington offers a sales tax exemption on qualifying solar equipment and net metering at retail rates. Moderate electricity rates and limited sun in western Washington mean longer solar payback, while EV fuel savings are strong.
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Incentive categories
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Program entries
14.91¢
Avg rate / kWh
24.1 yrs
Simple solar payback
$10,485
25-yr net solar savings
Moderate
Solar potential
Solar Incentives in Washington
Solar Sales Tax Exemption
100% of sales tax (systems ≤100 kW AC)
Exemption from state and local sales and use tax on equipment and installation labor for solar systems up to 100 kW AC, through December 31, 2029 (RCW 82.08.962). Buyers pay the tax and then apply to the Department of Revenue for a refund.
Eligibility: Purchasers of qualifying solar energy systems in Washington.
Net Metering
Retail-rate credits (until utility threshold)
Utilities must offer retail-rate net metering until June 30, 2029 or until net-metered capacity reaches 4% of the utility's 1996 peak demand, whichever comes first (RCW 80.60). A few utilities that reached the threshold now credit exports below retail; check yours.
Eligibility: WA utility customers with systems up to 100 kW.
Heat Pump Incentives in Washington
Federal HEAR Framework (State Availability Varies)
Statutory household cap up to $14,000
Federal law sets measure and household caps, but consumers can use rebates only where the state or territory program is active and funded. A listed cap is not an available award.
Eligibility: Income, equipment, project, state-program, and funding rules apply; confirm availability with the administering state program before purchase.
Get Free Solar Quotes for Your Home
Open the external EnergySage marketplace to request and compare itemized solar proposals.
Your estimated 25-year savings: $10,485
We are not affiliated with EnergySage and receive no commission or referral fee. The button opens an external site; review its terms and privacy policy.
Is Solar Worth It in Washington?
Solar in Washington is viable but not the strongest financial case. With the lowest electricity rates in the Pacific Northwest (derived from hydropower) and moderate sun (3.8 hrs/day), modeled payback is about 24.1 years. Best economics are for EV drivers who charge from solar.
Nationally, EnergySage reports the average U.S. homeowner saves about $60,500 over 25 years by going solar, without the expired federal credit (page updated June 2026). Actual savings vary by state, electricity rate, export rules, and system size.
Key Advantage
Full sales tax exemption, EV adoption rebates, and the EV charging use case dramatically improve Washington solar ROI for households with one or more EVs.
Watch Out For
Cheap hydro power (14.91¢/kWh) makes it hardest for solar to beat the grid. Western WA averages only 3.5 peak sun hours — eastern WA (5+ hours) has much better economics.
Solar Cost & Savings in Washington (8 kW System)
| Item | Amount |
|---|---|
| Gross install cost | $31,840 |
| Net install cost | $31,840 |
| Annual energy savings | $1,324 |
| Simple payback period | 24.1 years |
| 25-year net savings | $10,485 |
The federal residential solar tax credit (Section 25D) is not available for expenditures after Dec 31, 2025 and is not included above. State and utility incentives may still apply and are listed separately.
* Planning example for an 8 kW system: $3.98/W installed (LBNL 2024 national median; no state-specific sample), 3.8 peak sun hrs/day, one 20% system derate, 0.5%/yr panel degradation from year two, and 14.91¢/kWh escalating 2.5%/yr. It assumes all production offsets electricity at the retail rate; actual self-consumption and export credits vary by utility tariff. Tax credits require eligibility and sufficient tax liability.
Get Free Solar Quotes for Your Home
Open the external EnergySage marketplace to request and compare itemized solar proposals.
Your estimated 25-year savings: $10,485
We are not affiliated with EnergySage and receive no commission or referral fee. The button opens an external site; review its terms and privacy policy.
How to Go Solar in Washington: Step-by-Step
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Assess your solar + EV opportunity
If you have or plan an EV, solar economics improve dramatically. Charging an EV from your own production displaces grid electricity you would otherwise buy, which shortens payback compared with solar alone. Use the EV charging calculator with your own mileage and rate to size the effect.
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Check if you are in east or west Washington
Eastern WA (Spokane, Yakima) averages 5.2 peak sun hours — nearly 50% more than Seattle. Get production estimates specific to your location using NREL's PVWatts calculator.
Frequently Asked Questions — Solar & Clean Energy in Washington
Is solar worth it in Washington State in 2026?
It depends on your situation. Western Washington's low sun (3.5 hrs/day) and cheap hydropower (11¢/kWh) push modeled payback to about 24.1 years at the state-average inputs. Eastern Washington (5+ hrs/day) has much better economics. Solar plus an EV improves the case significantly, because charging from your own production displaces grid electricity you would otherwise buy.
Does solar work in Seattle's cloudy climate?
Yes, though production is lower than sunnier states. Seattle averages 3.5 peak sun hours/day. Germany — which has less sun than Seattle — is the world's largest solar market per capita. Modern bifacial panels also capture diffuse light on cloudy days.
Recommended Products for Washington
Product examples are provided for comparison only. Confirm electrical compatibility, installer requirements, warranty terms, and any current utility incentive before purchase.
Calculate Your Washington Savings
The Solar ROI link preselects Washington's planning inputs, including the listed electricity rate (14.91¢/kWh). Other tools open with their own defaults; review every input before calculating.
Browse Other States
Data Sources & Methodology
Incentive data: DSIRE, U.S. DOE Home Energy Rebates, IRS residential credit guidance, and linked state program pages. Electricity rates: EIA Electric Power Monthly, Table 5.6.A (June 2026). Solar resource: NREL PVWatts reference with state-level planning inputs, not an address-specific API result. Installed price: LBNL Tracking the Sun (Residential systems installed in 2024), a median rather than a quote. The 2.5% annual rate change is a model assumption, not a forecast. Sources and methodology reviewed 2026-09-06. Always verify current amounts with the administering agency and utility.