The Battery Balancer equalizes the state of charge of two series connected 12V batteries, or of 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 over 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 will converge to the same state of charge.
If needed, several balancers can be paralleled.
A 48V battery bank can be balanced with three Battery Balancers.
Green: on (battery voltage > 27,3V) Orange: lower battery leg active (deviation > 0,1V) Orange: upper battery leg active (deviation > 0,1V) Red: alarm (deviation > 0,2V). Remains on until the deviation has reduced to less than 0,14V, or until system voltage drops to less than 26,6V.
Normally open. The alarm relay closes when the red LED switches on and opens when the red LED switches off
Two terminals are available to connect a push button. Interconnecting the two terminals resets the relay. The reset condition will remain active until the alarm is over. Thereafter the relay will close again when a new alarm occurs
Even more insight and control with the midpoint monitoring function of the BMV-702 Battery Monitor
The BMV-702 measures the midpoint of a string of cells or batteries. It displays the deviation from the ideal midpoint in volts or percent. Separate deviation percentages can be set to trigger a visual/audible alarm and to close a potential free relay contact for remote alarm purposes.
Manufacturer Part Number
Input Voltage Range
Up to 18V per battery, 36V total
Midpoint deviation to start balancing
60V / 1A normally open
Over Temperature Protection
H100 x W113 x D47mm
Country of Manufacture