Originally Posted by
cblaisd
ScottC's warning about using a regular heating pad an an inverter has my shying away from that approach given that the fine print that I've seen on many DC-AC inverters suggest that they not be used for things that produce heat.
Generally, heaters do use a lot of power and are not appropriate for using with a car inverter. However, I am not sure that heating pads fall into that category. My wife has a heating pad she keeps on almost all winter for her birds, I plugged it into my Kill-a-watt meter and at medium, it was drawing less than 50 watts. I did a quick Goggle search and found a couple of references that say heating pads draw 60-65 watts. That shouldn't be a problem with a car inverter.