Hello!
I have a strange problem with my AC200Max.
I am using it as a power supply for the fridge in my camper.
It is being charged from car battery power.
I havent used the Pack for around 3 month, but topped it off to 100% before not using it and switched it on every month to allow it to charge if necessary.
I came back today to both a low and a high voltage battery warning.
The pack is sitting at 100% Soc according to the display.
After turning it on it shuts down after around 5 seconds.
It does no charge in that timespan and will shut down immediatly if any load is drawn.
The cell voltage does not make sense to me, is shows 3.31V on all cells exept 2 - one is at 1V and the other is at 4.99V (is this even possible on Lifepo?).
This looks like a BMS defect to me?
Any idea if (and how) this pack is savable or does it need a service?