In my office I have setup a 400A 48V battery and an inverter that generates 220VAC. Inverter also charges the battery.
We recently brought a new 220AC line that comes from the main grid with 16mm2 aluminum cable and it is 500 meters long.
So the issue is, when the power from the main grid dies invertor also shutting down itself. I thought that we have more load on the inverter then expected and tried reproducing the issue by cutting the AC source to the inverter by turning odd the breaker and that doesn't reproduce the issue. I tried this many times and inverter works perfectly.
My question is why if the AC source on the main grid goes down makes the inverter to shutdown?
We figured that the inverter will shut down itself only incase if it's used closer to the limit(13A in this case). I am running the inverter for the last two weeks with load of less than 5A and it works fine. I guess it is a manufacturer issue.