Newbie Poder Here; Boondock question

All excellent tips, especially the jumper cable ideal thanks folks!

+1 on what Stephen says.  And yes, use good-quality jumper cables if you need to hook up to your TV for a charge.  Run the engine for 30 minutes.

If your battery runs down, just back up your tow vehicle, plug in the electrical cable, and run the vehicle for a while. You'll need to be making minimal use of 12V while the battery charges. Solar panels are another option for continuous charging during the day...as long as it's sunny.

It all depends on your usage. The LED lights pull negligible power. The refrigerator can run for a long time on propane, but it also depends on the battery having enough power for the electronics. The heater's propane use depends on the temperatures. Temperatures in the 50's use much less propane than temperatures in the 30's, as can be expected. The microwave is a non-issue unless you have a generator capable of running it. My Generac iX2000 won't run the microwave, but will run the convection oven part.

If you are frugal with power, you should get 2-3 days on your 12V battery. If you have to run the furnace a lot, the time will be shorter. I opted to install dual 6 Volt batteries wired in series to produce 12 Volts. I have a much higher reserve capacity that way. Even so, I found out quickly that the refrigerator will drain the dual batteries down in 5-6 hours. Since then, I have run on propane unless I am at a place with AC.

Suggestion: Do not run the refrigerator on 12V while towing. The consensus is that most vehicles do not provide enough power to run the refrigerator and charge the battery also. The better way is to leave it on propane. That way, your battery will be charged when you arrive.