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Battery 'fuel gauge', time-to-go indicator, and much more
The remaining battery capacity depends on the ampere-hours consumed, discharge current, temperature, and the age of the battery. Complex software algorithms are needed to take all these variables into account.
Next to the basic display options, such as voltage, current, and ampere-hours consumed, the BMV-700 series
also displays the state of charge, time to go, and power consumption in Watts.
The BMV-702 features an additional input which can be programmed to measure the voltage (of a second
battery), battery temperature, or midpoint voltage (see below).
Bluetooth Smart
Use the Bluetooth Smart dongle to monitor your batteries on Apple or Android smartphones, tablets,
MacBook and other devices.
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 is a separate front bezel for a square or round display appearance, a securing ring for the rear
mounting and screws for the front mounting.
Easy to program (with your smartphone!)
A quick install menu and a detailed setup menu with scrolling texts assist the user when going through the
various settings.
Alternatively, choose the fast and easy solution: download the smartphone app (Bluetooth Smart dongle
needed)
Midpoint voltage monitoring (BMV-702 only)
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 depends 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.
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 noncritical 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
BMV-702 additional features
Additional input to measure voltage (of a second battery), temperature or midpoint voltage, and
corresponding alarm and relay settings.
BMV-700H: 60 to 385 VDC voltage range
No additional parts needed. Note: suitable for systems with grounded minus only (battery monitor is not
isolated from shunt).
Other battery monitoring options
- Lynx Shunt VE.Can
More about midpoint voltage
One bad cell or one bad battery can destroy a large, expensive battery bank. When batteries are connected in
series, a timely warning can be generated by measuring the midpoint voltage. Please see the BMV manual,
section 5.2, for more information.
We recommend the Battery Balancer (BMS012201000) to maximize the service life of series-connected batteries.
