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This is exactly the case for my battery. Small charges and discharges and charging laptops, phones etc via the inverter. I think the SOC-calculations is wide off. I did charge the battery full and left it a few days to settle. Last weekend there was no problems. I'm gonna monitor the voltages...

Thanks for your answers! Yes the battery probably defect. When it went dead this time soc reported still around 50% and capacity left 100aH. The first two times it went dead soc reported around 80-90%. It's now fully charged but one cell is 0.1V lower than the others that is completely balanced...

Hi and thank you for an excellent forum! I have a 200 Ah LiFEPO4 battery with a built in jdb BMS (JBD-SP04S034-L4S-200A). The battery powers from a 170W solar cell through a Victron BlueSolar MPPT 75/15. The loads on the battery are usually low 2-5A. Occasionally 10-15A when using 230V AC...