question

Try checking the 'charged voltage' setting of the shunt. If the battery exceeds this voltage, the shunt will think it's fully charged, so If it is too low, the shunt will keep synchronising every time the voltage crosses this threshold. Try raising it 50 - 100mV to see if this fixes the problem.

This Q&A is over a year old, and the answer posted did not resolve my problem. A VictronConnect update installed yesterday, v5.81, and the SmartShunt firmware is v4.12. I had disconnected my battery from the charging system following proper procedures. When I reconnected the battery the shunt for SOC showed “—“. I opened the Settings—Battery and tapped “State-of-Charge” to manually set SOC, but the feature was “dead.” I noticed a new option above this setting, “Battery SOC reset” with three choices; Clear, Set to 100%, and Keep SOC (probably part of the recent update). I tried selecting options “Clear” and “Keep SOC,” but the State-of-Charge setting Was still “dead.” Then I selected the third option, “Set to 100%.” State-of-Charge now showed “100%.” Now, I was able to manually set the estimated SOC. it seems, after the recent firmware updates that if the SmartShunt app shows “—“ as SOC and you cannot manually set SOC in Settings-State-of-Charge (option is dead), first reset SOC to 100% from Settings—Battery SOC reset—Set to 100%, then you will be able to manually set SOC.