Combining Systems with Powerwall
Powerwall & Solar
Integrating Powerwall and solar is the best way to maximize your system’s value, allowing you to use solar power day and night. Powerwall 3 has an integrated solar inverter allowing solar to be connected directly for high efficiency. Powerwall 2 is designed to be added on to an existing solar system and is compatible with all major inverter brands.
Powerwall & the Grid
When Powerwall is installed without solar, it charges from the grid to power your home during grid outages, to save you money on your electricity bill using Time-Based Control mode.
When Powerwall is installed with solar, recent installs can charge from the grid if allowed by your installer during commissioning and by the customer in their Tesla app.
Powerwall & Generators
Powerwall can be added to a system with a backup generator connected with an external Automatic Transfer Switch (ATS) or a Manual Transfer Switch (MTS).
Powerwall is installed between the utility meter and the transfer switch and can charge from solar while the grid is operational. However, the Powerwall and generator are not directly integrated which means Powerwall does not charge from the generator.
In an outage, Powerwall responds immediately and provides backup power before the generator can detect the outage. The generator is turned on only when the Powerwall has low charge, or if loads exceed Powerwall's maximum output.
When grid power returns, the generator will turn off and Powerwall can again charge from solar. If Powerwall is installed with a MTS, manual operation of the switch is required to power the home with the generator.
Powerwall & Electric Vehicle Charging
Powerwall can provide stored solar energy to your electric vehicle through your home electrical panel. However, there is no direct connection between Powerwall and your charging equipment.
Powerwall & Other Systems
Powerwall does not currently work with existing battery systems or other renewable energy sources, such as wind or hydro. Powerwall 3 cannot be added to a Powerwall 2 system. Learn more about what you can expect from Powerwall 3.