STEP 11: Turn On and Commission the System
Warning
Confirm the Powerwall 3
Enable switch and AC breaker are both OFF before terminating any wires at Powerwall 3,
or before altering / removing any wiring.
Confirm the following steps have been
completed BEFORE turning on
the Powerwall 3 Enable switch and energizing
the AC circuit:
- MCIs have been installed in each PV string as described in Install Mid-Circuit Interrupters in PV Array
- Each PV string has been tested as described in Test PV Strings with MCIs
Prepare the System for Commissioning
| Installation Scenario | Actions | |||||
|---|---|---|---|---|---|---|
| Powerwall Installation Complete? | Solar Installed? | Backup Switch Installed? | Does Utility / AHJ allow the system to run pre-PTO?* | Enable (On / Off) Switch | Powerwall 3 Breaker | Commissioning |
| Yes | Yes | Yes | No | Leave the Enable switch OFF | Leave the Powerwall 3 breaker CLOSED (ON) | See Commission the System After Powerwall and Solar Installation |
| Yes | Yes | Yes | Yes | Leave the Enable switch ON | Leave the Powerwall 3 breaker CLOSED (ON) | See Commission the System After Powerwall and Solar Installation |
| Yes | N/A (applicable whether solar is installed or not) | No | Yes | Leave the Enable switch ON | Leave the Powerwall 3 breaker CLOSED (ON) | Commission prior to Backup Switch installation |
| Yes | N/A (applicable whether solar is installed or not) | No, and commissioning could not be completed as defined above | N/A (system not ready to be turned on) | Leave the Enable switch OFF | Leave the Powerwall 3 breaker CLOSED (ON) | Commissioning cannot be completed at this time (schedule a second site visit to complete) |
| Yes | No | Yes | N/A (system not ready to be turned on) | Leave the Enable switch ON | Leave the Powerwall 3 breaker CLOSED (ON) | See Commission the System Ahead of Solar Installation |
| Yes, but commissioning could not be completed (could not resolve errors with troubleshooting) | N/A (applicable whether solar is installed or not) | Yes | N/A (system not ready to be turned on) | Leave the Enable switch OFF | Leave the Powerwall 3 breaker CLOSED (ON) | Commissioning cannot be completed at this time (schedule a second site visit to complete) |
| No (no AC service, install crew unable to complete, etc.) | No | No | N/A (system not yet installed) | Leave the Enable switch OFF | Leave the Powerwall 3 breaker OPEN (OFF) | Commissioning cannot be completed at this time (schedule a second site visit to complete) |
*In some cases, the Utility or AHJ may not allow the system to be turned on at the time of install. Instead, once PTO is received the customer can be notified to turn their system on.