Educate me on inverters, chargers and all things power

No APU/Gen here. Their output derates after 104*F but storage temp says 150*F+ so I dont see to much issue but might be worth an email to them.

 

If you have it installed properly, then it will be in a place where air can circulate around it and pull in sleeper air to cool it down.

 

A midsize gas generator, Honda's are good, and a battery charger, You sit at a truckstop a couple days and you will run the batteries down, fire the gen up and hook the charger up and within a few minutes the truck will start. Also keep in mind get the little refrigerator as level as possible. I had one in the truck The front was raised several feet in the air for engine work. The refrigerator didn't work when I got the truck out of the shop