Tesla Powerwall Powerwall 3 fault codes
The current unit. Its EMEA/APAC owner’s manual (July 2025) covers Powerwall 3, Powerwall 3 Expansion and Backup Gateway 2, decodes the front light by colour and gives an eight-step power cycle with a one-hour wait. Expansion units deliberately have no light at all. In Tesla’s Non-Backup configuration a Tesla Remote Meter replaces the Backup Gateway and, in Tesla’s words, the unit will not provide backup power during a grid outage.
Codes on the Powerwall 3 follow the same Tesla Powerwall scheme as the rest of the range. Where a code behaves differently on this generation, the code page says so.
Tesla Powerwall fault codes
Every published Tesla Powerwall code. Open a code to see which models and years it applies to.
- Flashing redTesla publish this as an inverter fault on the Powerwall 3. The other states matter more: an unlit expansion unit is normal, so is flashing white, and a Powerwall 2 uses a different table altogether.Get it checked
- Grid OutageNot a fault on a system with a Backup Gateway. Tesla publish the notification text and the behaviour, including that the Powerwall may discharge below your reserve. A Non-Backup Powerwall 3 does none of this.Usually simple to fix
- Breaker OpenA named app alert meaning the Powerwall’s AC breaker is off. Tesla say switch it back on — unless there is any sign of burning at the distribution board, when you stop and call them.Get it checked