Tesla Powerwall Cost 2026
Battery backup adds resilience during outages — here's exactly what our calculator adds to your system cost for one or two Tesla Powerwalls.
$11,500
added to your system cost, before tax credit
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Pricing Breakdown
Based on our calculator's $2.80/watt installed rate — added to your system cost, before tax credit.
| Option | Cost | Notes |
|---|---|---|
| No Battery | $0 | Solar-only system — no backup power during a grid outage |
| 1 Battery (Tesla Powerwall) | $11,500 | Powers essential circuits during an outage; most common choice |
| 2 Batteries (Tesla Powerwall) | $23,000 | Whole-home backup for extended outages |
What to Know
- ✓Our calculator adds a flat $11,500 for one Tesla Powerwall, or $23,000 for two — a fixed add-on, not a range
- ✓One Powerwall (13.5 kWh) typically covers essential circuits (fridge, lights, some outlets) during a grid outage
- ✓Two Powerwalls can back up most or all of a typical home's circuits for longer outages
- ✓Battery cost is included in the same 30% federal tax credit as the rest of your system, not a separate credit
Solar Cost by State
Installed price per watt is the same nationwide — state variance comes from electricity rates and sun hours changing your recommended system size.
California$7,056–$8,624
Texas$9,702–$11,858
Florida$9,349–$11,427
New York$8,291–$10,133
Arizona$8,644–$10,564
Nevada$10,055–$12,289
Washington$20,639–$25,225
Massachusetts$7,056–$8,624
North Carolina$12,524–$15,308
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