I had a strange result today on a 2 x 5MP2 (10kVA) and 8.2kWp Fronius Primo with 9.99kWp (18 x 555Wp) panels. The system is connected to a Solar MD battery 14.3kWh.The problem was that the system continued to charge the battery even though it was at 100% causing the battery to charge to almost 58V. The BMS had parameters of CCL = 4A and CVL 52V yet it continued charging. Note this was not during a grid outage so not using FPSC to shift the power down.
Load demand on the inverter was about 200 - 300W.
The AC coupled Fronius is setup as ESS and per the Victron Guide. 1 : 1 (10kVA ( 5 + 5) : 8.2kW). Is it a problem with battery size?
Modbus TCP power limit control
Battery Voltage and Current
CCL, CVL and DCL