SOC does not increase on Lynx Shunt using Orion DC to DC chargers

[pwfarnell]

The key is how is your chassis connected to your house battery negative, see my sketch in the link below, the chassis MUST be connected to the system/ load side of the shunt. If it connects to the house battery negative then it bypasses the shunt. It is all in the write up linked below.

Shunt / battery monitor not reading the correct SOC/ Amps, missing solar, decreasing daily or other misreading problems

This topic covers the SOC / Amps reported by BMV battery monitors, SmartShunts, Lynx BMSs and Lynx Shunts and will just be called shunt below. It is also assumed that the shunt is monitoring the domestic / house / cabin battery bank and not engine start / bow thruster / winch / caravan mover battery banks. The problems may be one or more of the following The SOC decreases daily despite the solar charger or other charger(s) working. The SOC increasing when discharging and falling when charging…