This is a new sysyem for ESS comprising MultiPlus II GX 48/5000/70-50, 3 Pylontech US2000C batteries with an external current transformer on the grid input.
Initially powers up fine, no batteries connected yet.
Clunking, relays?, from the MultiPlus. Display is showing the grid power, obviously batteries are showing low voltage because BMS not connected.
Connect batteries, more clunking, battery voltage now reading OK, about 49.3V. But have lost grid monitoring display says AC Disconnected also error #15 comes up. Says it's in ESS 3,4,5. After a little while longer more clunking and the 30A breaker trips out.
I have limited power on both charge and discharge to 3KW.
I have also tried running it in charger mode with the same result.
Only happens when batteries connected, runs for days if not.
I have been in touch with the supplier 3 weeks ago but they are not being very pro-active.
I am wondering if there is something wrong inside or has anyone else got any suggestions.
Trevor