Powerwall coordinates with Tesla vehicles for enhanced vehicle charging during a power cut without exceeding the energy and power capabilities of your Powerwall. Additionally, Powerwall continuously responds to the changing power needs of your home and will slow or stop your vehicle's charging to keep your home loads powered.

Note: Charging during a power cut will not affect the overall life of Powerwall or your vehicle’s battery.

How It Works

When a power cut occurs, Powerwall will charge your Tesla vehicle based on your charging threshold. Your charging threshold determines how much power you want Powerwall to share with your vehicle. To set the charging threshold, tap ‘Settings’ on the home screen of your Tesla app and adjust the slider. Once your Powerwall’s stored energy level is less than your threshold, Powerwall stops charging your vehicle and continues to provide backup power to your home. If charging stops, you’ll be able to resume charging your vehicle by doing one of the following:

• Lower your charging threshold
• Waiting for the power cut to end
• Waiting for solar to recharge your Powerwall above your set threshold

Solar Integration

If your home is equipped with solar and your vehicle is plugged in and charging while the sun is shining, Powerwall will continue to share any excess solar with your vehicle after Powerwall discharges to your set threshold. Powerwall’s stored energy will remain at your set threshold as long as there is excess solar available. When there is no longer excess solar available, Powerwall will automatically stop charging your vehicle and prioritise powering your home.

When your Powerwall has fully charged, solar production will stop. By sharing excess solar with your vehicle, your solar system can continue to produce energy and help you maximise the value of your solar installation, even during a power cut.