I have a question about the propane heater on an RV. I have a Class-C motorhome with both a roof heater/air-conditioner ran by electricity. I also have a propane heater that is separate from the roof heater. I always thought the propane heater was there to be used when not hooked up to shore power at a campground while the roof electric heater was to be used when electricity was available.
During one recent trip we decided to stay overnight at a Walmart parking lot rather than stopping at one of the many small campgrounds along the highway. The night was cold and getting colder so I turned on the propane heater. Everything worked just fine for about an hour or so when I realized the heater was no longer running. The fan had stopped and when the fan stops so does the heat. The igniter had also stopped to fire up the propane. I realized our battery had gone dead and there was no more power to run even the propane heater.
I was very surprised the propane heater was not able to run a full night and the battery had run down so quickly. What good is a propane heater if it doesn't operate when there is no electricity. I could have ran the generator at great expense I might add but by running the generator and providing my own internal electricity I might as well be operating the electric roof heater instead of the propane heater. Regardless I woiuld be burning gasoline to run the generator and by using the electric roof heater I would be saving my propane to operate the refrigator.
It seems all the propane appliances rely on battery power to operate the fans when not connected to a source of electricity. How does one overcome this problem so propane is a viable alternative when electricity is not available??