I too have a 2014 thor chateau and even with the battery disconnect in the storage position, there is a slight draw on the battery. I measured at .075 amp. The radio also draws from the chassis battery as well as the house battery to keep its settings. If you can't keep it plugged in to shore power or use a battery tender then I would recommend disconnecting the negative on the house battery and coach battery. If you look under the bed you will see there is a power takeoff with a fuse before the disconnect relay. I added a second battery and switches for the radio/video circuit and USB power station to reduce the load when dry camping.