Combining Systems with Powerwall

Powerwall & Solar 

Adding energy storage to your solar system is the best way to maximise your system’s value – allowing you to use solar power day and night. Powerwall can be integrated with a new or existing solar system. 

To ensure reliable operation during power outages, at least one Powerwall is required for each 5 kW AC of solar included in the backup circuit.  

Powerwall & the Grid 

When Powerwall is installed without solar, it can charge from the grid to support Backup-only Mode. Powerwall installations must also comply with rules around grid charging.

Though Powerwall can operate during when the grid is down, Powerwall must still be connected to the grid.

Powerwall & Generators

Powerwall can be added to an existing system that has solar panels and a backup generator connected with an external Automatic Transfer Switch (ATS) or Manual Transfer Switch (MTS). Powerwall is installed between the electrical service entrance and the transfer switch, where it charges 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 state of charge drops below a set threshold, 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 an MTS, manual operation of the switch is required to power the home with the generator. 

Powerwall & Other Batteries 

Powerwall does not currently work with existing battery systems.

Powerwall & Other Renewables 

Powerwall does not currently integrate with other renewable energy sources, such as wind or hydro.

Powerwall & EV Charging

Powerwall can provide stored solar energy to your EV through your home electrical panel. However, there is no direct connection between Powerwall and the EV wall connector.