Bobbo wrote:
afidel wrote:
CavemanCharlie wrote:
If you have a furnace with a fan built in it will drain your battery fast. You would need 2 batteries then for sure if you ever use the furnace without plugging in.
It takes some learning.
I have 2 deep cycle golf cart batteries. But, I like to go dry camping with no hook ups. With my set up I can go 2-3 days running the furnace if,, it's not too cold, and I am careful with usage. I have a 12 volt outlet in the camper near the antennae mounting plate and I plug a voltage meter in there to keep a eye in batter charge level.
Really? I've gone two nights with the 20k furnace in my trailer with a marine battery, not even a true deep cycle, one night low was around 30, other 28. Coming home from Florida we ran it 3 days as I didn't have time to winterize down there and my converter kept the battery topped off enough with overnight hookups. Perhaps the newer units use a better blower fan?
If your converter kept it topped off, you were plugged in. Your converter has to have 120v power to work. The post you quoted stipulates not plugged in to 120v.
If you are talking about running it while towing, the tow vehicle is providing current to keep the battery from running down.
Yes, if you are plugged in. Even if only once a day to recharge the batteries , then you can run the furnace as much as you want.