How Much Does Solar Battery Storage Cost in Washington?
Washington pricing is above the national average. Updated for 2026.
Solar Battery Storage Pricing in Washington
In Washington, the average cost for solar battery storage is $13,800 per battery system, which is 15% higher than the national average of $12,000. Most Washington residents pay between $9,200 and $23,000.
Washington has a higher cost of living than most states, which translates to higher labor rates and material costs. Urban areas within Washington may be even higher.
Home battery storage systems (like Tesla Powerwall, Enphase, and LG) store excess solar energy for use at night or during outages. Systems typically store 10-15 kWh, enough to power a home for several hours.
Washington vs National Average
What Affects Solar Battery Storage Cost in Washington?
Battery
Tesla Powerwall (13.5 kWh): $8,500-$12,500 installed. Enphase IQ (3.4-10.1 kWh): $6,000-$15,000. LG RESU (10-16 kWh): $8,000-$14,000
System size
Single battery: $8,000-$14,000. Dual battery (whole-home backup): $15,000-$25,000. Off-grid system: $20,000-$40,000
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💡 Tips to Save on Solar Battery Storage in Washington
- 1.The federal ITC tax credit covers 30% of battery costs when paired with solar
- 2.Some utilities offer time-of-use arbitrage programs that help batteries pay for themselves
- 3.Bundle battery with solar installation for lower total cost
- 4.Check state and utility rebates — many offer $2,000-$5,000 for battery storage
📈 Solar Battery Storage in Washington Cost Trends (2020–2024)
Prices have increased +17.7% over the last 5 years
| Year | National Avg | YoY Change |
|---|---|---|
| 2020 | $11,722 | — |
| 2021 | $12,214 | +4.2% |
| 2022 | $13,008 | +6.5% |
| 2023 | $13,372 | +2.8% |
| 2024 | $13,800 | +3.2% |
Based on national averages adjusted for annual inflation. Actual costs vary by location and project scope.
💬 What Did You Pay?
Real costs reported by homeowners for Solar Battery Storage in Washington
Recent Reports
Frequently Asked Questions
How long does a home battery last?
Most home batteries are warrantied for 10 years or 4,000-6,000 cycles. After the warranty period, they typically retain 60-80% of original capacity. Expected lifespan is 10-15 years.
Solar Battery Storage Cost in Other States
Related Cost Guides for Washington
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