I have a 2006 Fleetwood Sun Valley pup with a domestic 3 way fridge, 16k btu furnace, on demand water pump and a 5 gal hot water heater. I run a primary deep cycle agm rated at 200AH, with an 80AH backup battery and have found that depending on temps that the primary can fail by night two if not charged during the day. The primary is mounted outside on the tongue and the backup is kept inside the heated area. I am seeking the amperage draws of the electric components to size a solar set up to charge my batteries as we usually boondock. I have primarily been charging the batteries with a generator but would like to move to solar. We start camping in Canada in early April when temps at night drop down to freezing and need the furnace to operate for 3-4 days on our battery alone. Any concerns if I move the batteries into the cord storage bins to keep them warmer? Are there any off gassing issues that I ‘d need to address and how? Any help is appreciated!