When the output is disconnected or the inverter shuts down, the optimizer can adjust the module output voltage to a safe range to ensure the safety of the construction and O&M personnel as well as firefighters.

• The rapid shutdown function is supported only if optimizers are configured for all PV modules.
• You are advised to periodically check whether the rapid shutdown function is normal.

If optimizers are configured for all PV modules, the PV system can perform a rapid shutdown to decrease the output voltage to below 120 V within 15s and to below 30 V within 30s.

Perform the following steps to trigger a rapid shutdown:

• Method 1: Turn off the AC switch between the inverter and the power grid.
• Method 2: Turn off the DC switch on the inverter.
• Method 3: Connect a switch to the DI and GND ports of the inverter to form a circuit. (For details about which DI port is used, see the corresponding inverter user manual.) The switch is turned on by default. Turn off the switch to trigger a rapid shutdown.