A high precision battery monitor that displays an array of data including voltage, current and ampere hours consumed, as well as state of charge, time to go and power consumption in watts. This BMV-702 model also features an additional input which can be programmed to measure the voltage of a second battery, battery temperature or midpoint voltage.

Midpoint voltage monitoring is often used to monitor large and expensive battery banks, but for the first time is 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 of 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.

All electrical connections are to the quick connect PCV on the current shunt. The shunt connects to the monitor with a standard RJ12 telephone cable. A 10 metre RJ12 cable and 2 metre battery cable with fuse are included, no other components are required. 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.

BMV-702 is easy to program with your smartphone when you download the smartphone app and purchase a Bluetooth Smart dongle. Alternatively, the quick install menu and detailed setup menu with scrolling texts assist the user when going through the various settings. 

Key Features:

500 amp quick connect shunt and connection kit.
Battery voltage, current, power, ampere-hours consumed and state of charge.
Low current consumption: 2.9Ah per month (4mA) @ 12V and 2.2Ah per month (3mA) @ 24V.
High current measurement resolution: 10 mA (0.01A).
Programmable relay to turn off non-critical loads, or to run a generator when needed.
Programmable visual and audible alarm.
Remaining time at the current rate of discharge.
Shunt selection capability up to 10,000 amps.
Stores a wide range of historical events which can be used to evaluate usage patterns and battery health.
VE direct communication port.
Wide input voltage range: 6.5 - 95V.

Specifications:

Supply Voltage Range: 6.5-95 VDC.
Current Draw (Back Light Off): < 4mA.
Input Voltage Range (Auxiliary Battery): 6.5-95 VDC.
Battery Capacity (Ah): 1-9999 Ah.
Operating Temperature Range: -40C to +50C.
Temperature Measurement Range: -20C to +50C.
VE Direct Communication Port: Yes.
Relay: 60V/1A normally open (function can be inverted).

Resolution & Accuracy (with a 500A shunt).
Current: ± 0.01A.
Voltage: ±0.01V.
Amp Hours: ±0.1 Ah.
State of Charge (0-100%): ±0.1%.
Time To Go: ± 1 min.
Temperature (0-50C): ±1C/F.
Accuracy of Current Measurement: ±0.4%.
Accuracy of Voltage Measurement: ±0.3%.

Installation & Dimensions:
Installation: Flush mount.
Front: 63mm diameter.
Front Bezel: 69 x 69mm.
Shunt Connection Bolts: M10.
Body Diameter & Depth: 52mm and 31mm.
Protection Category: IP55 (not intended for outdoor use).

Standards:
Safety: EN 60335-1.
Emission/Immunity: EN55014-1 / EN55014-2.
Automotive: ECE R10-4 / EN 50498.