Victron Battery Balancer

The Victron Energy Battery Balancer (MPN BBA000100100) is a state of charge balancer or voltage balancer for 24V and 48V battery banks. It balances the state of charge of two 12V batteries connected in series or of several parallel strings of batteries connected in series. The balancer thus prevents damage to the battery due to an imbalance in the state of charge.

The problem: The service life of an expensive battery bank can be significantly shortened by an imbalance in the state of charge

A battery with a slightly increased internal leakage current in a 24V or 48V bank consisting of several batteries connected in series/parallel causes this battery and the batteries connected in parallel to be insufficiently charged, and in the case of batteries connected in series, this leads to overcharging. 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 equalization charging. However, larger differences lead to excessive gassing (caused by overcharging) in the batteries that had a higher initial state of charge and, due to the higher initial state of charge, to a higher initial state of charge in the batteries that had a lower initial state of chargegassing (caused by overcharging) in batteries that had a higher initial state of charge and due to sulfation (caused by insufficient charging) in batteries with a lower initial state of charge.

The solution: battery balancing with the Victron Battery Balancer

The Battery Balancer (state of charge equalizer) balances the state of charge of two 12V batteries connected in series or of several parallel strings of batteries connected in series.

When the charging voltage of a 24V battery system rises above 27.3V, the Battery Balancer switches on and compares the voltage of the two batteries connected in series. The 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 brought 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 battery balancers.

LED indicators

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 on until the deviation has fallen below 0.14V or until the system voltage drops below 26.6V.

Alarm relay

Normally open. Closes when the red LED turns on and opens when the red LED turns off.

Alarm reset

There are two terminals available for connecting a push button. If the two terminals are connected, the relay is reset.
The "reset" status remains active until the alarm is over. The relay then closes again.

Scope of delivery:
1x Victron BBA000100100 Battery Balancer
1x Operating instructions