New system I just am installing in van. Multiplus 3000 inverter/charger, two Lifepo4 12v batteries connected in series. Plugged into outlet with reverse polarity. Charger seems ok, but batteries go dead. when D/C load applied with charger off. The first battery, connected to positive side of circuit drops voltage to 7 v. Second battery connected in series on negative side of circuit has 14.3 v. Did I kill a battery or can it's BMS be reset?
