This post started off with a way to wire an inverter that I used when I worked for a major carrier that didn't allow inverters. Decided that next time I saw or heard of a truck catching on fire, I'd wonder if it was my doing. I was probably lucky I got away with it for so long to be honest.
That being said, if you haven't started orientation with knight, I'd suggest finding a driver friendly company. All of our trucks come equipped with an apu and fridge. I'm sure more companies do the same. For those of us who stay out more than a few days at a time, it makes a world of difference.