If purchasing and connecting to a Multi plus, the Victron Energy Cable for Smart BMS CL 12-100 to Mulit plus MUST be purchased.

Smart Battery Management System for Victron batteries only
For use with up to five batteries in parallel
12V systems only
Battery Management System with load disconnect and pre-alarm function.
Smart BMS with Charge Current Limiter that protects the alternator against overload.
Starter battery protection – only charges the lithium battery when the start batter is above 13 volts.
Remote on/off
LED Indicators
Built-in Bluetooth (see screenshots on the additional information tab.)