I mounted the compressor of the mini-split air conditioner (900BTU of cooling, 23 SEER2 efficiency rating) on the rear of the truck camper, which required removing the ladder.  Not a problem, since the roof is covered in solar:

I mounted the air handler:

I then had to drill a hole behind the air handler to the outside of the truck camper for the drain line and coolant lines, and ran the coolant lines up to the roof and back down to the compressor.  My neighbor happens to have an HVAC installation company, so he pressure tested my lines, then vacuumed them out so the coolant in the compressor could be released into the lines.

This air conditioner is amazing!  Instead of “all on / all off”, the compressor uses a variable amount of power to provide a constant level of cooling based on the thermostat setpoint.  Power consumption seems to range from 900 watts down to about 100 watts.

I can now park anywhere and have A/C and broadband Internet without any hookups!  This is a real game-changer, as it allows me to visit and stay in locations that would be too hot otherwise.