https://community.victronenergy.com/questions/174956/incorrect-soc-reported-1-instead-of-100-after-upgr.html?childToView=176519#answer-176519
I think this is a rehash of the above with a bit of a twist. My SOC has been flipping from 1% to current SOC, back and forth. I DO have a temperature sensor but have never been able to get it to work and gave up on it. I have had the temperature setting selected however. Changing this to none seemed to stop the SOC flip. Maybe the temp sensor has always been DOA and this just confirms further?
BMV-712 Smart monitor
