First of all, for about a week, the BMV-712 display did not drop from 100%.
I thought it was because "Battery starts synchronized" was enabled, so I turned it off, but no matter how many times I changed the setting in "state of charge", it kept going back to 100%.
Two days ago, I heard a beep from BMV-712 and the midpoint voltage deviation was 99.4%.
I measured the voltage difference between each battery and found only a 0.01V difference.
The voltage flowing to the shunt was also the same as the batteries.
I also checked that the shunt was on backwards and there was no problem.
What are the possible causes?