The last trip out last weekend it was 103 degrees here. The air conditioner worked it's butt off, but it still got up to aboout 94 inside. I noticed the windows on the sides produced a huge amount of heat transfer. Window awnings would help a lot, but can't afford those right now.
So I found some Solar Window Screen at Home Depot with good reviews. Picked up enough of the screen to do all the side windows for $50. Spent this morning changing them and taking out the regular screen. It's 106 here today, but had to close things up and do some other chores so not sure just how much my efforts will help, but I think anything is better than nothing. When I closed the bus up, it was 11:30 and 100 outside and 86 inside. This stuff is supposed to block 90 percent of the sun's rays hitting the glass...we shall see.
From the inside, the view is still pretty good to the outside and the darker screen does give some privacy and I like the way it looks too. Goes well with the tires and black trim around the wheels.
Here are some pictures of the installation
The view looking out from the inside
The emergency exit window on the port side is a single closed pane, so I am going to build a magnetic frame for that window if the solar screen helps because the way the window is positioned on the door, it would be difficult to screw it to the body and make it look nice.