Victron smallBMS

Victron smallBMS

The smallBMS is a simple and inexpensive alternative to the VE.Bus BMS, but does not have a VE.Bus interface
and is therefore not suitable for use with VE.Bus MultiPlus and Quattro inverter/chargers.

Features:

Load disconnect output

Can be used to control the remote on/off input of a BatteryProtect, Inverters, DC-DC converter or other loads that have remote on/off port functionality. Due to itsmaximum output current of 1A, it can even control a high-current relay or a contactor. Note that a
non inverting or inverting on/off cable may be required, please consult the manual.

Pre-alarm output 

The pre-alarm output can be used to issue a visible or audible warning when the battery voltage is low and will trip with a minimum delay of 30 seconds before the Load disconnect output is disabled due to cell undervoltage.

Charge disconnect output

Can be used to control the remote on/off port of a charger, such as the
Smart Charger IP43, a Cyrix-Li-Charge relay, a Cyrix-Li-ct Battery Combiner or a BatteryProtect. The output is normally high and becomes free floating in case of imminent low cell voltage or high/low temperature. Note that the Charge disconnect output is not suitable to power an inductive load such as a relay coil.

Remote on/off terminal

Both the Load and Charge disconnect output can be controlled remotely via the remote on/off terminal. When off, both outputs will be free floating so that loads and chargers are turned off.

LED indicators

The smallBMS has two LED indicators, a blue LED indicating that the Load disconnect
output is still high and the cell voltage is above the threshold set in the battery, and a red LED indicating that the Charge disconnect output is low due to high/low cell temperature or high cell voltage.