Victron SmallBMS NG [BMS400100300]SmallBMS NG The SmallBMS NG is an all in one Battery Management System (BMS) designed for Victron Lithium NG batteries (not compatible with lithium smart batteries). It monitors and protects the batteries by managing charge and load disconnects and providing pre alarms for low battery voltage. The SmallBMS NG is a straightforward and cost effective alternative to the VE. Bus BMS NG for applications that dont require integration with Victron inverter