Perform disconnection detection on optimizers and locate the disconnected ones.
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.
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. >
Replacing an Optimizer
Checking the PV string resistance