The Fisker Karma S is a concept vehicle from two California-based companies — Fisker, and Telsa — that have generated excitement around their electric vehicles. The Karma S is described as the convertible version of the roadster Fisker unveiled last year. Like the roadster, the Karma S is powered by a plug-in electric drive system that stores power from a wall socket before its unplugged from the grid and let loose on the open road.