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Powerwall 3
Home battery, not a generator. North America install spec: 13.5 kWh, split-phase 120/240 V, continuous output configurable up to 11.5 kW, and 15.4 kW off-grid when wired for it. Load start 185 A LRA. Unit weight 272.5 lb; 291.2 lb with cover and bracket. Solar-to-battery-to-home efficiency 89%. Tesla does not publish a consumer exploded parts diagram.
Automatic whole-home backup with solar, no fuel
- Continuous
- 11,500 W
- Stored
- 13.5 kWh
- Noise
- —
- Weight
- 272.5 lb
Specifications
| Fuel | Battery |
|---|---|
| Voltage | 120/240V |
| Gasoline running / peak | 11,500 W / 15,400 W |
| Engine | Integrated solar inverter, 6 MPPTs, up to 20 kW STC |
| Runtime note | 13.5 kWh usable. At a steady 1 kW that is about 13.5 hours; a central air conditioner empties it in a few hours unless solar is refilling it. |
| Noise note | No engine. The North America install spec does not print a single dBA number in the section used here. |
| Start | Automatic |
| THD | Grid-forming inverter in backup |
| Warranty | 10-year |
| Price note | Quoted and installed by a Tesla certified installer. Not a shelf price. |
| Source | Tesla Powerwall 3 installation specification, Backup Switch manual, North America |