I think there used to be an Audi model with a solar panel on the roof that was used to power the aircon when parked. No idea how effective it was, but the conce

I think there used to be an Audi model with a solar panel on the roof that was used to power the aircon when parked. No idea how effective it was, but the concept was clever, since when there was little sunlight, you wouldn’t need the power anyway.