Re: Does the Starting battery also need to be wired behind the Victron BMV-602S shunt
Only voltage is measured for battery 2. Usually battery 2 is a starting battery and as such is seldom down more than 1 or 2 AH.
Shunts are available separately from many sources, Blue Seas for one. The one supplied with the Victron is unique though as it has built in electronics and is designed to only connect with the Victron head unit.
Why do you want a shunt by itself?
Living aboard in Victoria Harbour