i got a multiplus 5000 parallel to the grid, using a Li ion battery with JK BMS. 15s. 2.7 - 4.2V according to data sheet. No communication JK BMS <> MP 5000 established.
NO Shunt added.
Worked good the last months.
Recently i ran into a problem: in ESS, the SOC says its about 10% (and stops discharging cause of ESS Minimum SOC Setting at 10%), while voltage is about 52 volt.
In the past, the system worked until 45 volt which is my Cutoff Voltage in VEConfigure.
How to fix this? I read about other similar setups without a shunt running fine.