BMV-702 Retail Victron Energy battery monitoring module

The BMV-702 is a high precision battery monitor. The essential function of a battery monitor is to calculate ampere hours consumed and the state of charge of a battery. Ampere hours consumed are calculated by integrating the current flowing in or out of the battery.

Midpoint voltage monitoring

This feature, which is often used in industry to monitor large and expensive battery banks, is now for the first time made available at a low cost, to monitor any battery bank.

A battery bank consists of a string of series connected cells. 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. Corrective action following a midpoint voltage alarm can prevent severe damage to an expensive battery. Please consult the BMV manual for more information.

Easy to install

All electrical connections are to the quick connect PCB on the current shunt. The shunt connects to the monitor with a standard RJ12 telephone cable. Included: RJ 12 cable (10 m) and battery cable with fuse (2 m); no other components needed.

Also included are a separate front bezel for a square or round display appearance, a securing ring for the rear mounting and screws for the front mounting.

Standard features:

Battery voltage, current, power, ampere-hours consumed and state of charge

Remaining time at the current rate of discharge

Programmable visual and audible alarm

Programmable relay, to turn off non critical loads or to run a generator when needed

500 Amp quick connect shunt and connection kit

Shunt selection capability up to 10.000 Amps

VE.Direct communication port

Stores a wide range of historical events, which can be used to evaluate usage patterns and battery health

Wide input voltage range: 6,5 – 95V

High current measurement resolution: 10 mA (0,01A)

Low current consumption: 2,9Ah per month (4mA) @12V and 2,2Ah per month (3mA) @ 24V

In the Support tab, there is an instructional video on how to install the BMV-7XX series monitor and optimization of synchronization parameters.