Appendix F: Shutting Down Powerwall 3

Powerwall 3 system shutdown for emergency response or maintenance requires system shutdown and disabling solar output.

Warning IconA warning icon, calling your attention to a possibly risky situation
CAUTION
Open all third party solar inverter breakers or handled disconnects before shutting down the Powerwall 3 system.

Safely Shut Down Powerwall 3 for Maintenance or Service

  1. Turn the Powerwall 3 On/Off switch OFF.
    Informational PurposesAn informational icon, calling your attention
    Note
    Powerwall 3 Expansion units are connected to Powerwall 3 via a factory-made harness. They are not connected to a breaker and they do not have an on/off switch; when Powerwall 3 is turned off, any Expansion units will automatically shut down.
  2. Turn the Powerwall 3 integrated DC isolator switch OFF.
  3. Open the Powerwall 3 AC circuit breaker.
  4. Wait 30 seconds before proceeding with any work.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    Warning
    Risk of electric shock from stored energy. Wait 30 seconds after disconnecting all sources of supply before proceeding.
  5. Use a lock-out device on the disconnecting means listed in the table below whenever performing work on equipment that is not within sight of the switch.

Disabling Solar, System Shutdown, and Disconnecting Means for Powerwall 3

Action Powerwall 3 AC-coupled Solar Inverter
On/Off Switch Integrated DC Isolator AC Breaker / Isolator External DC Isolator AC Breaker / Isolator
Disables Expansion Units Yes No No No No
Disables DC-coupled Solar Yes Yes No Yes No
Disables AC-coupled Solar No No No No Yes
Disables AC Inverter (Input and Output) Yes No Yes No No
Isolates DC side for maintenance No No No Yes Yes
Isolates AC side for maintenance No No Yes No No