There is a FAQ thread that is useful, it sounds like you need your solar controller or SmartShunt settings updating so it synchronises. If you have no joy after reading these then post us a screenshot of your settings.
This topic covers the reported SOC being out of sync with the actual battery voltage or state. It covers 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 and is often linked to mobile applications with small solar systems.
The SOC jum…
It could also be a wiring issue per second FAQ, but that is less likely.
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…