I have a new Multiplus II 48/3000 installation with 4 x 200ah gel batteries. The purpose for now is to use as backup power when the grid goes down. I have added a Venus GX controller and do plan to add a solar controller (MPPT 150/60) with panels in the next few months. I did a few basic changes (mostly the type of batteries) on the default configuration using VE Configure 3 software tool and the MK3 USB device and cable.
I now realise that when the grid power goes down the inverter will kick in and work as designed but when the grid power comes back the batteries will not charge back to 100% capacity. (It stay at the current level). I tested it in charge only mode by changing the switch from I to II and then it charges the batteries. Could someone please give me a pointer to the setting I need to change in Ve Configure to correct this behaviour?
