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Every Battery & Solar component to make your Victron solution complete. If you have not yet bought your batteries or solar panels you will be surprised at how competitive we can be on Victron Solar, Lithium & AGM packages.
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Product Details:
The Problem: Voltage Imbalance Kills Batteries
One battery with a slightly higher internal leakage current in a 24V or 48V bank of several series/parallel connected batteries will cause undercharge of that battery and parallel connected batteries, and overcharge of the series connected batteries. Moreover, when new cells or batteries are connected in series, they should all have the same initial state of charge. Small differences will be ironed out during absorption or equalize charging, but large differences will result in damage due to excessive gassing (caused by overcharging) of the batteries with the higher initial state of charge and sulphation (caused by undercharging) of the batteries with the lower initial state of charge. Obviously, this can substantially shorten the service life of batteries in either circumstance.
The Solution: Battery Balancing
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 27,3V, 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 0.7A 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 for higher currents (quicker balancing), while a 48V battery bank can be balanced with three Battery Balancers.
Midpoint Voltage Monitoring
The BMV-702 and BMV-712 battery monitors measure the midpoint of a string of cells or batteries. The midpoint voltage is the voltage halfway along the string. Ideally, the midpoint voltage would be exactly half of the total voltage. In practice, however, deviations will be seen, that depend on many factors such as a different state of charge for new batteries or cells, different temperatures, internal leakage currents, capacities and much more. Large or increasing deviation of the midpoint voltage points to improper battery care or a failed battery or cell.
Using this balancer, the monitor 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. For more information about battery balancing please see the manual of the BMV-702.
LED Indicators
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.
Alarm Relay
Normally open. The alarm relay closes when the red LED switches on and opens when the red LED switches off.
Alarm Reset
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.
Or for official dimensions, please see the Technical Drawing.
Additional information
| Weight | 0.408 kg |
|---|---|
| Dimensions | 5 × 21 × 15 cm |
| Brand | Victron |
