Tesla
ALT-03

Backup Failed / No Power During Outage

Grid outage occurred but Powerwall did not provide backup power.

Battery SOC at or below backup reserve levelLoads not wired to backup/home side of GatewayGateway contactor faultLoad exceeds Powerwall continuous rating
STEP 1
Check backup reserve: Tesla app > Settings > Backup Reserve. If battery was at or below reserve, backup will not activate.
STEP 2
Confirm backed-up circuits are wired to the LOAD/Home side of Backup Gateway 2 (not the source side).
Reserve above SOC, loads correctly wired, Gateway power cycled — still no backup. Contact Tesla: 0800 756 9960.
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