I've installed 6 multiplus II 48/5000/70-50 (2 on each phase) with 6 pylontech batteries 48V 200Ah each + 4 MPPT smartsolar 250/100 VE.CAN + cerbo GX . The system is working fine when AC input is available. The system shut down with err17 ( phase master missing ) when the grid is off and pass to inverting mode. It doesn’t happen when the generator Is off (the generator is current by the relay inside the cerbo). I’ve changed all the communication cables between the inverter and cerbo and still the same issue.