The SOC on my B-Box 10.25kw battery stack jumps by around 25% at certain points in the charge/discharge cycle.
This became a problem this morning as I was expecting a 4 hour power outage. I had the SOC at 50% overnight, in preparation. The SOC dropped from 45% to 20% in a few seconds during the outage - power draw was in the region of 1kw at the time.
Then when recharging, it bounced up 25% again almost instantly.
I looked at the batteries this morning and noticed that one of the units does not have flashing lights on it. Am I looking at a failure here?