Yep, an electric blanket as a "prep" item.
Considering that my electric blanket is 60 watts, if that was powered off an inverter, it would probably be a useful way of preheating the bed, off grid.
60 watts of one hours heating the bed is cheaper in energy usage to boiling the kettle and filling up the hot water bottle.
Also that 60 watts is for on top setting. There are 3 settings plus "off", making me think that each "bar" is 20 watts. (sleeping on it is quite nice. Its like lying on an electric stove.....)
Lets say 20 watts (lowest setting) on for 10 hours a night, being 200 watt / hours
Thus some solar and wind power would pay back more than enough to partially heat the bed all night long.
Or alternatively 1 - 2 hour on a bicycle generator if the solar and wind was poor quality on any one day.
With enough bed clothing one could keep very warm if there was no heating in the house and the temp had reached the minuses.
I actually used to know a drugged up hippie who would sleep in a bender tent in the snow and ice. He said that just tonnes of bed clothes is all you needed.
So with tonnes of bed clothes plus 20 watts to keep energy going into the bed, you might be ok in sub zero temperatures.
What do you think? Solar power to power a full bed electric blanket on "low" at night?
Good idea or 
silly as heck? Or maybe just a good way of keeping warm plus saving mains gas?
