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The take away here is that solar panels do have a cooling effect when covering an asphalt roof. This is clearly an advantage when the rooms below that roof require air conditioning in the summer.
Another way to reduce air conditioning costs is to install a solar powered ventilation fan in the attic.
I installed a SunRise Solar Attic Fan many years ago and it reduced my attic temperature by up to 60°F. These clever designs use a 10 W solar panel directly connected to a fan. You can add a thermostat to ensure that it is not running when the attic is cool.
So one can definitely say that solar panels are cool!