batteries are a trip
You might do some checking by turning EVERYTHING off and measuring the draw on the batteries. I know on our previous 5'er, with everything off and disconnects it STILL had enough parasitic draw to kill the batteries in a day or two.
One other thing to check is the amp draw of the items you want to run...
AND that the charge rate of the batteries and the invertor are matched..
i.e. when I went to the trojans, I had to change the charge rate on my invertor to not pump more power into the batteries than they could handle.
understand that two batteries will not provide boon docking performance without a large solar array and./or more batteries.
good luck !