It’s hard to find an energy wonk out there who doesn’t love the idea of electric cars. Most white papers on ending our oil dependency envision a large future role for plug-in vehicles and hybrids in the future. The concept has legions of devoted fans. Back in 2006, the documentary “Who Killed the Electric Car?” became a cult classic, and there’s a sequel coming out later this year — titled, yes, “Revenge of the Electric Car” — about the companies and eccentric inventors racing to develop a viable EV model.