Re: Turn off the engine while downhill!
"...the Nissan Leaf has solar panels to power the air-conditioner..."
You're not very good with numbers, are you? A small solar panel might be capable of powering a fan to move hot air out of the cabin, keeping it at ambient. But a solar powered air conditioner would need (much) more than a square foot of capture area of solar panel in the 10 watt class.
Ref. "The Leaf's SL trim has a small solar panel at the rear of the roof/spoiler that can trickle charge the auxiliary battery."
Biting the hand that feeds IT
