Outage protection
When paired with compatible isolation equipment and a properly designed backup plan, Powerwall automatically separates from the grid and powers the backed-up loads.
Battery + integrated solar inverter
Tesla Powerwall 3
A compact home-energy system built to store solar power, support high-demand loads, and keep selected—or properly designed whole-home—circuits running during an outage.
Energy13.5 kWh
Continuous outputUp to 11.5 kW AC
Solar inputUp to 20 kW DC
Warranty10 years
How it helps
Storage, solar control, and backup in one system.
Powerwall 3 combines a battery with an integrated solar inverter. The result is fewer separate boxes, app-based energy control, and a system that can be expanded as the home’s needs grow.
Time-of-use control
Stored energy can help reduce grid use during expensive utility periods, depending on the rate plan, settings, and available battery charge.
Expandable capacity
Powerwall 3 supports additional Powerwall units and Powerwall 3 Expansion batteries, allowing energy and power to be sized separately.
You want meaningful backup—not just a battery on the wall.
- You want to keep critical loads running during outages
- You have large electrical loads that need strong starting power
- You want solar and storage managed in the Tesla app
- You may add storage capacity later
Powerwall 3 at a glance
| Nominal battery energy | 13.5 kWh AC |
|---|---|
| On-grid output options | 5.8–11.5 kW AC |
| Load-start capability | 185 LRA |
| Solar MPPTs | 6 |
| Installation | Indoor or outdoor |
Arizona design note
The battery count depends on loads, not square footage.
Air conditioners, pool equipment, electric water heating, EV charging, service size, and desired outage duration all matter. One Powerwall may cover a focused backup plan; larger homes or whole-home goals may need additional power and capacity.
Final equipment, output setting, isolation hardware, backup circuits, and expansion count depend on site conditions, utility requirements, code, engineering, and the approved design.