Required Tools and PPE

De-Energize Powerwall 3

In Powerwall 3, Rapid Shutdown is initiated by turning the Powerwall 3 Enable switch OFF, or by pushing the System Shutdown Switch if one is present. Upon initiation of Rapid Shutdown, Powerwall 3 will stop power conversion and initiate Rapid Shutdown (all MCIs will open and PV voltages will drop to safe levels). Once Powerwall 3 is in this state, it is safe to perform service.

To de-energize Powerwall 3:

1. If a System Shutdown Switch is present, push it to initiate Rapid Shutdown.
2. Turn the Powerwall 3 Enable switch OFF.

   

3. Open the Powerwall 3 AC circuit breaker and install a breaker clasp and lock out / tag out to secure it against reconnection.

   

   • This will initiate Rapid Shutdown and bring the PV voltage to a safe level.
4. Wait 30 seconds before proceeding.
   Warning

   Risk of electric shock from stored energy. Wait 30 seconds after disconnecting all sources of supply before proceeding.
5. Remove the (6X) fasteners holding the glass front cover in place, then carefully remove the front cover and set it aside.
6. Remove the PV isolator connector:
   1. Push the plastic levers to release the PV isolator connector.
   2. Remove the PV isolator connector.

      

   Warning

   The PV isolator is not load breaking. Ensure AC power is disconnected before unplugging this connector.
   Note

   The connector inside the unit that serves as the PV isolator is defined as a Disconnecting Means for Isolating PV Equipment in compliance with NEC sec. 690.15.
7. Using a suitable measuring device:
   1. Place the test probe in each rectangular screwdriver slot in the PV-in terminal blocks to ensure there is no voltage present.
   2. Place the test probe in each rectangular screwdriver slot in the equipment grounding conductor block to ensure there is no voltage present.
   3. Place the test probe in each rectangular screwdriver slot in the AC-out terminal block to ensure there is no voltage present.
   Note

   See Appendix B: Wiring Reference for a labeled diagram of all terminal blocks.
8. Using cabinet or electronics tip slotted screwdriver (up to 3/16-inch or 4.5 mm):
   1. Open the jaws of each opening in the PV-in terminal blocks and unplug each wire from the blocks.
   2. Open the jaws of each opening in the AC-out terminal blocks and unplug each wire from the block.
   3. Open the jaws of each opening in the ground conductor terminal blocks and unplug each wire from the block.
9. If performing any work away from Powerwall 3, lock and tag out the Powerwall 3 AC breaker.