Vehicle Charging During Power Outage

Powerwall now coordinates with Tesla vehicles during a power outage to charge your car without exceeding the energy and power capabilities of your Powerwall. The Powerwall reacts to the power needs of your home and will slow or stop your vehicle's charging, keeping your home loads powered.

During a power outage, your Tesla vehicle will charge from the Powerwall whenever it is above the threshold set in the Tesla app. You can change this threshold to balance your home and transportation energy needs.

Keep your vehicle plugged in while the sun is shining and surplus solar will charge your vehicle. Charging stops when Powerwall’s stored energy drops below your set threshold.

Vehicle Charging Behavior

Grid State Home Electric Loads Charging Behavior
On Grid Any Load Vehicle charges as normal
Power outage with Powerwall above energy threshold or surplus solar Low Loads Vehicle charges with surplus power and energy
High Loads Vehicle slows charging to prioritize your home loads
Power outage with Powerwall below energy threshold Any Load Vehicle stops charging
Grid State Home Electric Loads Charging Behavior
On Grid Any Load Vehicle charges as normal
Power outage with Powerwall above energy threshold or surplus solar Low Loads Vehicle charges with surplus power and energy
High Loads Vehicle slows charging to prioritize your home loads
Power outage with Powerwall below energy threshold Any Load Vehicle stops charging

Note: Vehicle charging may not automatically restart if charging stops. You can restart charging by reseating your vehicle's charge cable.

Supported Versions

  • Powerwall: 1.46+
  • Tesla Mobile App: 3.10.2+
  • Model 3/Model Y – North America: 2019.40.1+
  • Model 3/Model Y – Other Regions: Coming Soon
  • Model S/Model X: Coming Soon

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