I have only disconnected the batteries in an attempt to see if anything changes by someones suggestion. That is when I found out only the TV,Microwave and electrical plugs have power with straight shore power and the furnace does not. I am normally having the house batteries connected and experiencing the dual 6 volt battery drain every couple hours when the furnace is on as it needs to be in this cold weather.
This 2015 Thor Challenger has the Xantrex PRO XM 1800 inverter and a Furrion F50-ATS 50 amp125/250V Automatic Transfer Switch