The problem with heating is requirement of power.
For any such heater if you go for above 120W, you will be drawing more than 10A from the power socket, which can trip the fuse.
If you get a 200W heater, the best way is to install a separate power socket directly connected to battery with thick wires. It will be able to take 20A easily. Just make sure you do not run it without the engine started, as it will drain battery quickly. |