12V Heater Current Draw

10 amp draw Bill, it's really going to drop charge on whatever battery you are using very fast.
Most items in that sort of range (12v ovens, compressors) require the engine to be running and charging a battery to ensure you don't flatten it.

What battery are you using, a main or aux . . . and what capacity, if you know (amp hrs) ?

You just want to warm up a space in a tent or camper before bedtime ?

As per the link, in heating mode, the current draw is stated to be 10.1 Amps. As it's fitted with a cigarette lighter plug, check your car's handbook to see what it says about maximum current through the cigarette lighter plug. I've done an internet search on cigarette lighter plugs which suggests 8-10A maximum, but only for the time required to heat up the cigarette lighter itself!!! That would suggest that you remove the cigarette lighter plug from the heater and power it through a better plug and receptacle system with heavier cable (both supply and return). If you run the heater off a fully-charged 110A.hr secondary battery, you'll only get about 5 hours use before starting to damage the battery unless the car is running. Presumably you are looking at running the heater inside a van or tent when camping?

Not enough to warm you up unless it's 35c outside.

You can only use them for a short period and they are completely useless.

12V battery heaters are not viable.

Thanks for the advice.

Thought it would be a bit tough on a battery.

Cheaper to put more clothes on!!!!!

bill

Bill,
I have an older model of this unit I use in my camper trailer. It small and compact and heats the area quite well. Uses the propane cans you can buy anywhere, very happy with it.
http://outdoor.companionbrands.com.au/index.php?p=line&sid=1306130608

Cheers
David

About all it would be good for is knocking the fog off the windscreen while you wait for the car motor to warm up and take over.

Anything with a heater element will suck down the electrons.

If it's for keeping warm at night, you might be better off with a 12 volt electric blanket. I have been looking at one of these, but have no idea if they are any good.
https://www.tektrek.com.au/12v-electric-blanket-comfy-cruise
Keith

The fact must be faced that heating anything with electricity is inefficient .... even 240v mains electricity with a limitless supply...... but as soon as you get to trying to heat something off 12V .... anything ..... heating becomes rediculoulsy impractical ..... generating and storing enough energy is the problem.

if you want to heat something .... you simply can not compete with burning some sort of fuel.

cheers