I have a similar set up with an Axpert 5kVA and 2 x Leoch Li-ion 48V batteries in parallel. My problem is that I can't get the system to charge the batteries at anything more than 26A. So in the day with small loads when I want my PV to charge the batteries the inverter stops charging when it reaches 26A from solar. I have 3kWp solar. After stopping the charge the inverter then starts charging agin until it reaches 26A again when it cuts out. I have tried all kinds of settings but without any luck. Please help.