I have 20kWh Lion batteries on a Multiplus II 5kva 48v Every night at the start of cheap rate the batteries start charging they jump from 35% SOC to 55% SOC after 2 mins of charge. Then the moment charging stops they drop from 100% to 80% immediately. This system has been in for only 1 month, but it just seems very odd. Is this normal or to be expected? any ideas on what is going on? Much appreciated.
