I have a MPPT 150/45 battery charger installed with 24VDC 340Ah battery system and a PV array of 3 parallel panels (Voc- 33.7A, Isc 8.92A). I have noticed the SOC% drops down to 0% at the start of the charging cycle around 20 times last year and now, battery is not fully charging to 100% and max SOC remains around 50%. Presumably the battery health was reduced during the period and I'm unable to figure out the reason. This is the only abnormality I found and any advise is highly appreciated