Off-Grid Battery Bank Voltage Imbalance: Diagnose and Fix It
Off-grid battery bank voltage imbalance occurs when series-connected batteries or internal cells reach different states of charge, capacities, or temperatures. The condition reduces usable bank capacity because the weakest unit reaches its safe voltage limit first, while repeated charging can overcharge stronger units and accelerate sulfation, electrolyte loss, lithium BMS trips, or permanent cell damage. […]