All true. Apparently an entire team of Nissan engineers were unable to figure that out.
Huh... I just found someone's masters thesis on basically just what I proposed
http://sherhpa.fiz-karlsruhe.de/script/ ... arreto.pdf
Looks like Audi's e-tron concept involves a heat pump:
http://www.smartplanet.com/business/blo ... ctric/864/
EV1 used a reversible heat pump, and that was a decade ago:
As a northerner, I'd gladly pay good money extra for a heat-pump heating system. To me, such a feature would be worth $3k or so -- an more than an order of magnitude more than it'd cost them to add such a feature. If it utilized waste heat, it could buy you 15 miles or so range when it's cold out.
Seriously, what would they need? A retractable air intake cover, an external temperature sensor (if they don't already have one), some ducting from the pack fan, some ducting from the motor cooling system (not sure what type they use), three or four solenoids, and some extra controls and control circuitry. That's nothing.