We just got back from the lake where it was over 100 degrees during the day on our 6 day trip and I was parked in full sun......... I have a Glacier Peak 2016 26 RLS and it has a big slide and using just the 15K BTU A/C unit we were able to keep it a cool 74- 76 degrees inside ( comfortable) and used low on a/c most of the time using the Honda 2000's. We had the either or option of using the 13.5K A/C in the bedroom which really worked well when we turned in but only used it a couple of hours at night when we had the main unit off until the outside temperatures dropped. The fridge worked outstanding on propane and was set on a mid level setting and we had frozen food and ice the entire trip with excellent cooling on the main box.
So while it was hot out the ORV worked as designed. By the way the shades and dual pane windows worked great The shades really worked well to help deflect the heat. All in all our aftermarket solar worked perfectly and we had a great trip in spite of the temperatures. So ORV you did a great job building one to stand the heat of Arizona's deserts and made our trip one to remember.