1. Check the input side wiring of the microinverter to ensure it is properly connected

2. Verify the condition of the components (junction boxes) to ensure they are functioning correctly and there are no issues with the connections.

1. If the overvoltage/undervoltage issue occurs occasionally, it might be due to a short-term abnormality in the power grid. In such cases, the equipment will resume normal operation automatically once the power grid stabilizes, and no manual intervention is needed.

2. If it occurs frequently, it is essential to check whether the grid voltage is within the allowed range. If it is obviously high or low, it is advisable to contact the local power utility. With their consent, you can adjust the grid overvoltage or undervoltage limits through the monitoring platform to address the problem.

1. If the input voltage is too high, please ensure that the input PV panel voltage is not higher than the maximum input voltage of the microinverter.

2. If the input voltage is low or zero, please ensure that the components are connected normally

3. If the component voltage is within the normal range, please report to the installer.