Well, I'd take issue with "when it's hot, the sun is out", but that's what the batteries are for. I like all things solar powered! Kinda pricey at $5,700+ for 600 square feet. A unit for the smart could be scaled down drastically from that unit though.
Not sure where the solar panels would be located on the car. But, in the EV they could do double duty to trickle charge the drive batteries when the A/C is not in use.
