VE.Bus BMS NGThe VE. Bus BMS NG is an all in one Battery Management System (BMS) for Victron Lithium NG batteries (not compatible with Lithium Battery Smart batteries), designed for systems with Victron inverters or inverter chargers using VE. Bus communication. It monitors and protects the batteries against over voltage and under voltage of any individual cell, and also over temperature or under temperature conditions. With built in Bluetooth, it connects