I have a problem in my campervan. I’m using AGM 115Ah battery. It’s not new but should still be in good shape. I changed every piece of my system to Victron (Smart Solar, Orion, Smart Shunt, Multiplus, Cerbo). I think there’s something wrong with the settings as SOC doesn’t go up slowly during the charging but jumps straight up when PV starts working. I spent few days off-grid and noticed that my SOC was completely wrong. You can see this on the graph.
Why don’t you show us your values and settings from the shunt … It looks as if the values for tail current and/or a charging voltage are not correct. Did you adjust the values or did you just accept them when you installed them?
Have a look at the 2 FAQs listed in the sticky topic at the top of the DIY category. The title reflects your problem. On the SmartShunt set your charged voltage to 0.2V lower than absorption.
Thank you! That all was very helpful. I had the opportunity to correct my settings and test the whole thing. It worked. It seems that my SoC is now showing the truth. Thank you for your help.