Fully electric cars are still a niche product bought mostly by affluent drivers. But sales of even these vehicles have been growing fast, thanks in part to federal and state tax rebates. Among the best selling of these cars is the luxurious Model S produced by Tesla Motors, which has been so successful that companies like BMW and Cadillac are also rushing to bring out high-end electric cars.
http://www.nytimes.com/2013/08/11/opinion/sunday/a-clean-car-boom.html?emc=eta1&_r=0