There are getting to be quit a few EV's out there now and up and coming. Is there any other competition that use this same kind of range extender technology as the Volt, other than Fisker? Fisker is twice the price and a premium vehicle so its not really in the same class as the volt, kind of apples and oranges. Trains have been doing it for a long time so there has to be another manufacturer concidering this idea. Anyone?