[Jack Houpe]

Its been a couple years so forgive me as I'm pulling from memory. 

From the picture of the color panel it shows your inverter is not connected to shore power, did it ever show up on the color panel as on line to shore power? Here is a picture of what it should look like using battery only and then shore power. Can you open victron connect on your lap top using the usb adaptor that plugs into the inverter charger via ethernet connection? Have you set the type battery you are using in the inverter charger to Lithium? There are a number of features that if not turned off or set up correctly will drive you crazy on the victron inverter charger. Make sure you link everything using the blue tooth app. The DC to DC converter is stepping down to 13.6 in replacement of the house batteries or is this to charge the house batteries? 57V is 100% charge on a 48V lithium system so the inverter charger shouldn't be putting out any voltage to the batteries. Looks like you set up the MPPT charge controller via blue tooth. Here is a chart that I use, I use the conservative values to the right of the chart on all my solar projects, it will prolong the life of the batteries well beyond my life. Not saying you should but the chart to the left for 48v will give you an idea of state of charge of your battery and you can program that via blue tooth to the shunt that measures voltage and current and it will appear on your color panel. Maybe dropping your battery voltage to 54v rather than 57v will help out of the DC to DC converter which has a max of 56v