Rapid Shutdown Initiation
Upon initiating Rapid Shutdown, the MCI excitation signal is lost and all MCIs will open within 30 seconds, bringing all voltages across the solar assembly and PV strings to safe levels.
Rapid Shutdown Manual Initiation
Rapid Shutdown is initiated using the System Shutdown Switch.
Note
Beginning with Powerwall
software version 21.39.1, all shutdown switches (including the external System
Shutdown Switch described here) will shut down all CAN-connected components when
activated. The following table defines System Shutdown Switch behavior for
systems on software versions earlier than 21.39.1; for systems on software
version 21.39.1 or later, see STEP 7: Install System Shutdown Switch.
Note
Turning the Enable switch on each Powerwall+ OFF will also shut down all
equipment.
System Shutdown Switch Function Pre-21.39.1
| Action | System Behavior | |
|---|---|---|
| Turn Switch to OFF (open) Position | Solar Rapid Shutdown (RSD) is initiated and solar output is disabled for any unit connected to the switch | |
| Turn Switch to ON (closed) Position | The solar assembly performs a system self-test and then resumes operation | |