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
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Pricing Breakdown
Based on our calculator's $2.80/watt installed rate — added to your system cost.
| 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 a fixed add-on to your system price — like the rest of the system, it's no longer eligible for a federal residential tax credit as of 2026
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$10,080–$12,320
Texas$13,860–$16,940
Florida$13,356–$16,324
New York$11,844–$14,476
Arizona$12,348–$15,092
Nevada$14,364–$17,556
Washington$29,484–$36,036
Massachusetts$10,080–$12,320
North Carolina$17,892–$21,868
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