The Victron Battery Balancer compensates the state of charge of two 12 V batteries connected in series or of several parallel strings of batteries connected in series.
The problem: The life of an expensive battery bank can be considerably shortened by an imbalance in the charge state
A battery with a slightly increased internal leakage current in a 24V or 48V bank of several batteries connected in series/parallel will cause the battery and batteries connected in parallel not to be sufficiently charged and, in the case of batteries connected in series, overcharging will occur. In addition, when new cells or batteries are connected in series, they should all have the same initial state of charge. Minor differences can be ironed out during the constant voltage phase or during equalisation charging. However, larger differences will cause damage due to excessive gassing (caused by overcharging) in batteries with a higher initial state of charge and sulphation (caused by insufficient charging) in batteries with a lower initial state of charge.
The solution: battery balancing
The Victron Battery Balancer compensates the state of charge of two 12V batteries connected in series or of several parallel strings of batteries connected in series. When the charge voltage of a 24V battery system rises above 27.3V, the Victron Battery Balancer switches on and compares the voltage of the two batteries connected in series. The Victron Battery Balancer draws a current of up to 0.7A from the battery (or batteries connected in parallel) with the highest voltage. The resulting difference in charging current then ensures that all batteries are equalized to the same state of charge.
If necessary, several balancers can be connected in parallel.
A 48 V battery bank can be balanced with three Victron Battery Balancer.
Green: on (battery voltage > 27.3V)
Orange: lower battery circuit active (deviation > 0.1V)
Orange: upper battery circuit active (deviation > 0.1V)
Red: Alarm (deviation > 0.2V) Remains active until the deviation has dropped below 0.14V or until the system voltage drops below 26.6V.
Normally open. Closes when the red LED turns on and opens when the red LED turns off.
Two connectors are available for connecting a push button. If the two connections are coupled, the relay is reset. The "Reset" state remains active until the alarm is over. Then the relay will close again when a new alarm occurs.