Originally Posted by chaslorr
How long will my battery run the furnace when not connected to electricity? Is it reasonable to assume it would power it for a night stop over, and then after a days driving and charging from the tow vehicle, power it for another night. This would be without using any other draws such as lights and such. Have Rockwood Minilite 2109S with single 12 volt battery.
There are so many variables here it's very difficult to give a good answer.
First lets cut to the chaise- many folks falsely believe that they can recharge
the trailer battery by hooking up to their tow vehicle and driving.
Wrong! Since the trailer battery is so far down stream the voltage regulator in the engine charges the engine battery then cuts back
on voltage so as not to over charge the engine battery. This leaves the
trailer battery with very little charge going to it.
2nd- you might be OK for 1 night on battery with the furnace if you don't
turn the thermostat up too high. We camped several times with one
battery and were fine the first night. The 2nd nite we ran out of juice....
It also depends on how cold the nights are how big your trailer is etc.
Hope this helps!