heater for roof top tent

Interesting question!
At 1.2 amp at 12.5 volts per person (their words) that's 15 watts per person. Two observations: that's less than one brake light globe (21 watt) per person - how much warmth would that create? But twice that may have an impact overnight on battery capacity unless you have plenty of battery capacity (ie, on top of fridge etc.)
But why would you bother anyway? I cannot see how it would have much impact on condensation, with such a low energy output, so maybe a hot water bottle would be a better answer.

Why not just cuddle up!!! A lot cheaper and heaps more fun.

Phil

This what you are looking for . . . link below . .

Features 12-volt Electric Blanket
With two heating stages
Integrated temperature guard
Strain-relieved connection cable
Heating elements of extremely flexible, coated wire
Suitable for mobile use

Two heating stages:
Stage I = pleasant permanent heat
Stage II = heat-up
Material:
Easy-care micro velour fleece, 100% polyester
Operating voltage 12 volts from cigarette lighter socket
Capacity
Stage I: 20 watts
Stage II: 45 watts
Dimensions (L x W) 1550 mm x 1050 mm
Test mark e-approved to 95/54/EC (EMC guidelines for vehicles)

MagicComfort MH25B Universal Electric Blanket

I just use my full length thermos and seem to find my neighbouring campers are gone before I get up in the morning.

Hi Greg T,
i
In cold areas I use a single elec blanket from a rear socket ,through a 300 watt inverta.Turn it of once in bed.Never had a problem yet and nice and warm.I believe that there are now 12 volt blankets available. Some may knock it but it works for me.just pay attention to all the wiring and make sure the 12 volt socket has appropriate size wiring.
Regards Paul.

Good morning
I have an electric blanket in my left hand , otherwise i could not type if it was in both hands.
12v 1.47 long and 1.1 wide.4 amp draw.
Never used as i have not needed it yet. I may give it a go at the Pyrenees weekend.
Murray

a quick familly survey came up with the simple answer -toughen up a bit and get a better quilt

We just have 2 hot water bottles in sleeping bags, the heat they produce is excellent.... and safe.. and you can re use the water the following night. Michael

Hi all,
thanks for the advice about the blanket and hardening up.

for me, there is nothing like going camping in the middle of winter in the high country with a couple of glugs of warming juice while the fish are on.
however, getting the bride to consider camping in -5 onwards again, an electric blanket is on the cards.

the water bottle doesn't last that long, especially when the bride has raynards (spelling?), so it is quite difficult for her to get warm. even with my manly snuggles.

ill be looking into that electric blanket a bit more, and see if i can get away with it on the spare battery.