The first thing you need is measure you real power use (amp hrs and watt hours)
Get a bogart or tri metric, or some other watt power meter and go spend a normal camping might
I think your going to be really surprised by how much power you really used
You have not been running the generator enough to get the batteries properly recharged, but that might be partially the fault of your converter, you need 14.4v at the battery from the converter and that could be for 4~6 hours each day, for a 35 amp converter charger
A good high amp 14+v converter could return,60 amp hours to your batteries in a couple of hours
