My E-meter has a accurate reading, so I can tell how much power I am using from my 4 golf cart batteries.
Your refrigerator, CO meter and propane detector all together consume about 35 AH per day, or about 35X12volts or 420 watts. This is about what one of my 120 watt solar panels will put out in a day in the sun.
I would recommend a pair of solar panels in the 100 - 150 watt size range. Then you will be able to dry camp for a couple of days, or a week (without needing the furnace), and still have plenty of power.
SunElec.comThey are fairly easy to install.
Fred.
