Battery power in fall

how many batteries? what is it's/their capacity?
bumpy

Depends on the battery capacity BUT since you are asking the question, in all likelihood, the answer is NO.

We are pretty good on here and yes I see you have a fairly new camper BUT how many AH is your battery or is it your batteries?

When I camped at the race tracks, I would be lucky to get a night on a battery and heater when it dipped into the 30s.

Also will depend on what you want your thermostat set on/how warm do you want to keep the inside?

Probably pushing it for a single battery set-up, a pair of fully charged batteries will fare much better under this scenario. Of course it all depends on how long furnace is run daily and how many amphours other DC powered items are consuming. A general rule of thumb is roughly a battery a day when extended furnace use is expected, adding some solar can keep you going for days.

With a single battery you'll be able to run it one night AND if it's not so cold that it would cycle 100%.
Run furnace a few hours before bed time only. Then you'll have some juice left for tomorrow.

Furnaces are terrible in terms of energy use.

Yes or no. I don't know.

General rule of thumb for using Furnace on Propane and running Furnace Fan from the battery is ONE NIGHT - ONE BATTERY...

The Furnace FAN will draw somewhere around 5-6AMPS DC Current and if this is on all night long it just barely has enough capacity to make it until daylight... There will another 1-2 AMPS being drawn all the time with battery called parasitic drains as well.

Changing over to LED lights will help out big time as each automotive incandescent 12V light bulb will draw 1AMP DC current. Changing this buld to LED lightning the power drain will be improved by 80%...

At least carry a second fully battery along with you even if it isn't hooked up...

Roy

As long as all four batteries are fully charged.
Single battery? Not really but depends on actual use.