I am also understanding that if I want to run it to the battery that I should be fine with 10AWG wire but I want to make sure it is THWN type. Any thoughts? Should I go straight to the battery and then hook up a relay so it shuts off when the car does or is the switch by itself fine (assuming I always remember to turn it off)? Any schematics recommended? I just want this finished and am stumped on the best/easiest way to do this setup.