Cerbo gx SOC at 93% but Voltage LIFEPO4 at 10V

[Speedboard]

Hi, why my cerbo-gx indicates 93% SOC with the battery (LIFEPO4) voltage at 10V and the integrated BMS cuts?

What Am I doing wrong?

[pwfarnell]

Because the charged voltage on your SmartShunt is set incorrectly at 12.8V. This means your SmartShunt can synchronise to 100% before your battery is full. You need to set it 0.1-0.2V below your absorption voltage. This is described in the manual and in the FAQ linked below.

Battery monitor jumping to 100% or reporting a high SOC with low Volts / the BMS shuts down

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…