Victron Battery Monitor BMV-702 (Gray Color)
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, also displays state of charge, time to go, and power consumption in Watts. Additional input which can be programmed to measure the voltage (of a second battery), battery temperature or midpoint voltage
• 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.
Auxiliary input: can be used to measure the voltage of a second battery, or temperature using the temperature accessory, or midpoint voltage
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
Current draw, back light off: < 4mA
Battery capacity (Ah): 1 – 9999 Ah
Protection: IP55 (not intended for outdoor use)
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.