OK I probably need some advice from the ICE masters who install fish tanks and fridges in their cars.
Anyway I dont wanna pay NOS £150 for a heater jacket for my nitrous bottle, when I can pick up a 30 C reptile tank heater mat from the pet shop for under a tenner. All I need to know is what do I use to power a 240v AC device off of the 12-14 v DC of the car battery?