How to maximise cooling effectiveness on hot day???

I would think it is still better to park out of the sun. If you stop the surfaces heating up then you don't need to try to remove the heat with a fan. It is also better for your paint and upholstery.

 

I agree. It is better to keep the car out of the sun and keep it cool naturally, rather than relying on the solar cooling system.

 

You definitely want to park in the shade. The temp of a parking lot here in the summer can reach 140 + degrees. I am wondering if it's pulling that hot air through the car to cool it???

I am very lucky to have a parking garage here at work.

 

Yes, from what I have seen, it just moves the hot air around. It doesn't provide any actual "air conditioning".

 

Park in the shade and get the bird crap, sap, leaves, caterpillars, and all the nasty stuff that can fall from trees (I'm in Florida and there IS nasty stuff that falls from trees). Or park in the sun and let the UV deteriorate the rubber, plastic, and paint. Ah, what difference does it make in the end? We're probably all going to trade our 2010s in for a plug-in in a few years anyway!

 

All official temps are shade temps so in a 90 degree day your car will be 90 degrees inside if left in the shade, and probably just 110 in the sun (other non-sun-roof cars will be 120+) ...
so shade is always your best bet! :mod:

 

I believe solar panels, at least the one's on my house, still generate voltage in the shade.
Here's a little trick if you want to leave your dog in the car: Leave the car vehicle power on, lights off, air conditioning running. Roll down driver's window. Get out and close door. Reach in and lock locks. Flip the window switch to roll up while quickly removing your arm. The vehicle is locked and A/C is running on battery most of the time. Then use your hard key slid out from key fob to open the door when you want to get back in.

 

That's great, but I bet it is just a matter of time (and not much time) before someone sees your dog in a closed car with the windows shut and no motor running and you come back to a bashed in window and a starring role on Animal Police on the Animal Planet Channel.

Cute parlor trick, but doesn't sound too practical to me. Besides, Henry (my Field Spaniel) would be so angry at being left behind he probably would never speak to me again.

 

In Oz we get the solar panels with the moonroof. I have gotten in the habit of leaving the moonroof open to the first stop and the heated air rises out through it.

Then approaching the car I hit the remote aircon to get that last bit of cooling if it is really hot.

If I have had to park in the sun then the combination of moonroof and solar powered fan really does quite a good job.

David