Victron Battery Balancer

The Battery Balancer equalizes the state of charge of two series-connected 12V batteries or several parallel strings of series-connected batteries. When the charge voltage of a 24V battery system increases to more than 27V, the Battery Balancer will turn on and compare the voltage across the two series-connected batteries. The Battery Balancer will draw a current of up to 1A from the battery (or parallel-connected batteries) with the highest voltage. The resulting charge current differential will ensure that all batteries converge to the same state of charge.