Solar Car Fan, the set up

I thought being homeless and sleeping in my car during the winter would be a problem.  Thanks to the Cascade -40 sleeping bag, this was never an issue.  However, summer has come, and it is getting very hot in the car.  Therefore, I have decided to purchase one of those solar car window fans, the Solar Powered Car Auto Cool Air Vent Cooler Cooling Fan.  (Believe it or not, that is the name of the product listed on Amazon.)

While waiting for the fan to arrive, I am going to test the interior temperature of my car compared to the exterior temperature.  On Friday, I am going to stop by my storage locker and pick up my temperature and humidity gauge, which I previously used to make sure the temperature and humidity was acceptable for candy making.  On Saturday, then, I will start creating a spreadsheet monitoring temperatures.  I will repeat this when the item arrives.

One thing I have already learned:  Always read the entire add before buying something on Amazon.  The second last sentence of the description states that the item will not work on dark tinted windows.  That must mean the solar panels end up inside the car, which is a pretty stupid design decision.  Anyhow, we shall see how the thing works when it gets here.