I have 2 sok 206 ah batteries, had them connected in parallel and was working fine. Had to disconnect them for a few days to do some work. After reconnecting they only show 13.3 volts and won't charge any more than that.
I have both a Victron mppt charger and Victron 12v to 12v charger so I can put 30 plus amps into the batteries but the stop at 13.8 while charging then go back to 13.3.
Any ideas? Could the bms in both batteries be off?
13.8V is fully charged voltage, If you connect with inverter, it drop down to 13.3V is normal, it will run at 13.3V at long time.
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