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Rapid Shutdown
When all PV modules connected to the solar inverter are configured with optimizers, the PV system shuts down quickly and reduces the output voltage of the PV string to below 30 V within 30 seconds. If optimizers are configured for some PV modules, the rapid shutdown function is not supported.
Perform the following step to trigger rapid shutdown:
- Method 1: Use the rapid shutdown function. Set Dry contact function to DI Rapid Shutdown. Connect the access switch to pins 7 and 5 of the inverter communications terminal. The switch is turned off by default. When the switch is turned on, rapid shutdown is triggered.
- Method 2: Turn off the AC switch between the solar inverter and the power grid.(If the SUN2000 supports and enables the off-grid function, the rapid shutdown function is not supported.)
- Method 3: Turn off the DC switch at the bottom of the SUN2000. (If an extra DC switch is connected to the input side of the SUN2000, turning off this DC switch will not trigger rapid shutdown.)
- Method 4: If AFCI is enabled, the inverter automatically detects arc faults, triggering a rapid shutdown.
