Victron VE.Bus BMS V2

Victron VE.Bus BMS V2

The next generation VE.Bus BMS V2
The VE.Bus BMS V2 is the next generation of the VE.Bus Battery Management System (BMS) for Victron Energy Lithium Battery Smart
batteries. These batteries are Lithium Iron Phosphate (LiFePO4) batteries and are available in 12.8 V or 25.6 V in various capacities. They can
be connected in series, parallel and series/parallel so that a battery bank can be built for system voltages of 12 V, 24 V or 48 V. The maximum
number of batteries in one system is 20, which results in a maximum energy storage of 84 kWh in a 12 V system and up to 102 kWh in a 24 V1)
and 48 V1) system.
It is designed to interface with and protect the lithium batteries in systems that have Victron inverters or inverter/chargers that have VE.Bus
communication.
Protects each individual cell of a Victron Lithium Battery Smart
For reliable and safe operation, a LiFePO₄ battery must be monitored and protected against over voltage and under voltage of any
individual cell, and also over temperature or under temperature conditions. The Victron Lithium Battery Smart range includes integrated cell
voltage monitoring, cell voltage balancing, and temperature monitoring.
If the cell voltage or battery temperature is outside of the allowable range, this is communicated to the BMS via two BMS cables with M8
circular connectors. In systems with multiple batteries, the BMS cables of each battery are connected in series (daisy chained), with the first
and the last BMS cables connected to the BMS.
Based on the status of the Victron Lithium Battery Smart or batteries, the BMS will:
• Generate a pre-alarm signal to alert of an imminent cell under voltage condition.
• Disable inverting in VE.Bus inverters or inverter/chargers via VE.Bus, and disable other loads via the “Load Disconnect” terminal in the
event of a cell under voltage condition.
• Disable charging in VE.Bus inverters or inverter/chargers via VE.Bus, disable VE.Direct and VE.Can solar chargers via a GX device and
disable other chargers via the 'Charge Disconnect' terminal in the event of a cell overvoltage, under temperature or over temperature
condition.
Communication with VE.Bus products
MultiPlus, Quattro or Phoenix inverters connect to the ‘MultiPlus/Quattro’ port with a standard RJ45 UTP cable.
The BMS disables inverting in the case of a cell under voltage condition and disables charging in the case of a cell over voltage or
temperature condition.
Communication with remote devices
A GX device (such as a Cerbo GX), Digital Multi Control (DMC) panel or a VE.Bus Smart dongle (including any combination) can be connected
to the BMS via the 'Remote panel' port. These accessories can all be used in combination with the BMS to remotely control the VE.Bus
Inverter or inverter/charger switch state (on/off/charger-only).
Auxiliary power input and output terminals
The BMS has a dedicated power output terminal (GX-Power) for a GX device and an auxiliary power input terminal (Aux-In) for an external
DC power source, such as an AC/DC adaptor. In the event of a system shutdown, the GX device will remain powered via the auxiliary power
input or be disconnected to prevent further battery discharge.
Remote terminals
These terminals can be used to switch the BMS on or off. When the BMS is off, both outputs will be free floating so that loads and chargers
are turned off. There are two remote terminals, namely, “Remote L” and “Remote H”. A remote on/off switch or relay contact can be
connected between L and H to switch the BMS on or off. Alternatively, terminal H can be switched to battery plus, or terminal L can be
switched to battery Minus.
LED indicators
The BMS has the following LED indications:
• Status (blue): Lights shortly once every 10 seconds to indicate normal operation.
• Temp or Cell>4 V (red): Lights when the charge disconnect output is low because of cell overvoltage or overtemperature.
• Cell>2.8 V (blue): Lights when the load disconnect output is high and the battery cell voltages are above 2.8 V

VE.Bus BMS V2 BMS300200200
Input voltage range 9 – 70 VDC
Current draw - regular operation 10 mA (excluding Load disconnect current)
Current draw - low cell voltage 2 mA
Current draw - switched off via remote on/off terminal 1.50 mA
GX-pow output 1 A
Aux-in input 1 A
Load disconnect output
Normally high (output voltage ≈ supply voltage – 1 V)
Floating when the load needs to be disconnected
Source current limit: 1 A
Sink current: 0 A
Charge disconnect output
Normally high, (output voltage ≈ supply voltage – 1 V)
Floating when charger should be disconnected
Source current limit: 10 mA
Sink current: 0 A
Pre-alarm output current rating 1 A, not short circuit protected
Remote terminals
Usage modes to turn the system on or off:
a) ON when the L and H terminal are interconnected (switch or relay
contact)
b) ON when the L terminal is pulled to battery minus (V<3.5 V)
c) ON when the H terminal is high (2.9 V < VH < Vbat)
d) OFF in all other conditions
VE.Bus communication port 2 x RJ45 sockets to connect to all VE.Bus products
GENERAL
Operating temperature -20 to +50 °C 0 – 120 °F
Humidity Max. 95 % (non-condensing)
Protection grade IP20
ENCLOSURE
Material ABS
Colour Matt black with a blue sticker
Weight 120 gr
Dimensions (h x w x d) 23.8 mm x 94.5 mm x 105.5 mm
STANDARDS
Standards: Safety
Emission
Immunity
Automotive
EN 60950
EN 61000-6-3, EN 55014-1
EN 61000-6-2, EN 61000-6-1, EN 55014-2
EN 50498
EXTERNAL AC-DC ADAPTER
Min. power rating 1 A@12 V - If the nominal output voltage is > battery voltage, the AC-DC
adapter takes over the power supply of the GX device.

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