Is a home battery worth it in Washington?
Washington's low electricity rates make battery bill savings modest; the sales-tax exemption trims upfront cost and net metering helps solar, so backup value carries most of the case. The federal Section 25D purchase credit expired Dec 31 2025, so a 2026 cash buyer gets $0 federal.
Washington at a glance
- Average residential rate
- 14 cents per kWh
- Net metering
- Statewide net metering is available and credits excess generation. Confirm current terms with your utility.
- State battery incentive
- State sales-and-use tax exemption on solar-plus-storage systems under 100 kW (runs through 2029), which reduces upfront cost but is not a cash rebate. No statewide cash battery rebate. Confirm eligibility.
- Time-of-use plans
- Less central here
What drives battery value here
Windstorms and heavy snow in parts of the state cause periodic outages, though rates are low. Low electricity rates weaken bill-savings math, so backup during windstorms is the stronger reason to add a battery.
The federal picture in 2026
The federal residential purchase credit (Section 25D) expired on December 31, 2025, so a 2026 cash buyer gets nothing federal. The only surviving federal pathway is Section 48E, which a company claims on a lease or PPA. State and utility programs, where they exist, now do the heavy lifting.
Sources
- https://www.eia.gov/electricity/monthly/epm_table_grapher.php?t=epmt_5_6_a
- https://www.solarwa.org/solar_incentives
Rates and incentive amounts change; always confirm current terms with your utility or program administrator.
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