A niche market in the EV world is Electric Plug-In Conversions, converting a run-of-the-mill hybrid (e.g. a used Prius) to a plug-in hybrid.
Minnesota's local converter ReGo Electric Conversions is holding an open house bright and early August 9, 2011 from 7:00 A.M. to 11:00 A.M. at 5925 Nicollet Ave South.
They tell me a conversion is $4995. This is a factor of 10 cheaper than a Chevy Volt. Still, at what price of gas ($/gal) is this economical?