A Typical 13.5 kWh Battery in Washington
Backup, cost, and time-of-use bill savings
Installed Cost
$14,500
State Rebate
None
Net Cost
$14,500
Backup (essentials)
15 hrs
Avg Outages
5 hrs/yr
Bill Savings/yr
$239
Bill-Savings Payback
40 yrs
15-Year Savings
-$10,046
Washington Battery Rebates
✕
Federal 25D Credit (Expired Dec 31, 2025)
The 30% federal Residential Clean Energy Credit covered standalone home batteries through December 31, 2025. Batteries installed in 2026 no longer qualify.
Varies
Washington State & Utility Programs
Washington has no statewide battery rebate; windstorm and wildfire outages add backup value. View full rebate detail →
Battery Backup & Savings by City in Washington
| City | Bill Savings/yr | Outage Hrs/yr | Population ↓ | Utility |
|---|---|---|---|---|
| Seattle | $251 | 5 hrs | 744,955 | Seattle City Light |
| Spokane | $212 | 4 hrs | 228,989 | Avista Utilities |
| Tacoma | $228 | 4 hrs | 219,346 | Tacoma Public Utilities |
| Vancouver | $204 | 4 hrs | 190,915 | Clark Public Utilities |
| Bellevue | $208 | 4 hrs | 148,164 | Puget Sound Energy |
| Kent | $275 | 5 hrs | 136,588 | Puget Sound Energy |
| Everett | $216 | 5 hrs | 112,024 | Puget Sound Energy |
| Renton | $275 | 5 hrs | 106,785 | Puget Sound Energy |
| Spokane Valley | $259 | 4 hrs | 99,208 | Avista Utilities |
| Kirkland | $239 | 6 hrs | 92,175 | Puget Sound Energy |
Home Battery Savings Calculator
Instant estimate — no email required
A typical home battery (e.g. a Tesla Powerwall) is ~13.5 kWh.
Quick Facts: Washington
- 🔌 Avg outages: 5 hrs/yr
- ⚡ Electricity: $0.102/kWh
- 📊 Peak/off-peak gap: $0.06/kWh
- 🏭 Top utility: Puget Sound Energy