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The VE.Bus BMS protects each individual cell of a Victron lithium-iron-phosphate (LiFePO4 or LFP) battery.
Each individual cell of a LiFePO4 battery must be protected against over voltage, under voltage and over temperature. Victron LiFePO4 batteries have integrated Balancing, Temperature and Voltage control (acronym: BTV) and connect to the VE.Bus BMS with two M8 circular connector cord sets.The BTVs of several batteries can be daisy chained. Please see our LiFePO4 battery documentation for details.
The BMS will:
Shut down or disconnect loads in case of imminent cell under voltage.
Reduce charge current in case of imminent cell overvoltage or over temperature (VE.Bus products only, see below).
Shut down or disconnect battery chargers in case of imminent cell overvoltage or over temperature.
Protects 12V, 24V and 48V systems
The operating voltage range of the BMS: 9 to 70V DC.
Communicates with all VE.Bus products
The VE.Bus BMS connects to a MultiPlus, Quattro or Phoenix inverter with a standard RJ45 UTP cable.
Other products, without VE.Bus can be controlled as shown below:
Load Disconnect
The Load Disconnect output is normally high and becomes free floating in case of imminent cell under voltage. Maximum current: 2A.
The Load Disconnect output can be used to control
Charge Disconnect
The Charge Disconnect output is normally high and becomes free floating in case of imminent cell over voltage or over temperature. Maximum current: 10mA.
The Charge Disconnect output can be used to control
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 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).
Use the Bluetooth Smart dongle to monitor your batteries on Apple or Android smartphones, tablets, macbooks and other devices.
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.
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)
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.
– 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
Additional input to measure voltage (of a second battery), temperature or midpoint voltage, and corresponding alarm and relay settings.
No additional parts needed. Note: suitable for systems with grounded minus only (battery monitor is not isolated from shunt).
– Lynx Shunt VE.Can
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 a Battery Balancer (BMS012201000) to maximize service life of series-connected batteries.