Question:
In a project, the inverter is disconnected from the network in the morning and at night.
Troubleshooting method:
The inverter can be connected to the grid at noon every day, indicating that the inverter may have minor problems.
Troubleshooting procedure:
1. Check the inverter alarm cause when the inverter is disconnected from the network.
2. If the inverter generates an undervoltage alarm, the AC voltage of the inverter may be abnormal. Use a multimeter to measure the AC voltage of the inverter.
3. The actual inverter AC voltage is 447 V, which is lower than the level-1 undervoltage protection threshold.
4. Solution:
This situation may be a weak grid. You can modify the level-1 undervoltage protection value of the inverter on the mobile app after obtaining the approval of the related department to enable the inverter to connect to the grid.
Conclusion:
The inverter has normal grid connection time every day, indicating that the inverter can connect to the grid properly when possible. The fault is not caused by the inverter itself. Therefore, try to locate the fault onsite.
