Just came across this now as I had my first issue with my 48V EG4-LifePower4 I purchased a couple months ago. I'm using it to backup circuits in the house (few lights, home office outlets and the well pump as to not pull out the generator for water for short duration outages). We had a power outage yesterday and the inverter (Sungold Power 48V 6000W) didn't switch over as expected. I've tested before by switching off the AC supply into the inverter to simulate a power disruption and it's always been fine but never had the well pump on (or come on) during those tests or some other heavy loads active. Battery was flashing red "alarm".
The well pump (3/4hp ~900W when running) was on at the time as I was watering the garden and from reading everything in here, it wasn't the inrush current as it was running, rather the huge demand when the inverter switched off AC to battery. I don't know 100% but there was maybe 1500W max on at the time on those circuits with the pump on. Now I'm thinking if I have more than a 1000W and the power fails and the inverter kicks over, it's just going to die so the whole UPS "backup" seems pretty useless at this point.
I have the BMS monitoring tool hooked up but can't get to the historical tab due to the "password" but suspect it will just convey it was "short circuit" protection or whatever. Looks like I may have to go the Overkill BMS route and tell everyone in our local Solar group to steer clear of these batteries or at least the model I got.
The well pump (3/4hp ~900W when running) was on at the time as I was watering the garden and from reading everything in here, it wasn't the inrush current as it was running, rather the huge demand when the inverter switched off AC to battery. I don't know 100% but there was maybe 1500W max on at the time on those circuits with the pump on. Now I'm thinking if I have more than a 1000W and the power fails and the inverter kicks over, it's just going to die so the whole UPS "backup" seems pretty useless at this point.
I have the BMS monitoring tool hooked up but can't get to the historical tab due to the "password" but suspect it will just convey it was "short circuit" protection or whatever. Looks like I may have to go the Overkill BMS route and tell everyone in our local Solar group to steer clear of these batteries or at least the model I got.