I remember the black window tint (window van) being cooler. It was much darker inside the van. However, I added spray foam insulation to the rest of the interior so that kills any apples-to-apples comparison.
As an aside, I also remember buying a solar powered fan that fit in the side window of a vehicle. The fan pulled out a little of the vehicle's hot air but the greenhouse effect of the car made hot air faster than the wimpy fan could suck it out!
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