Besides the upcoming Fisker Karma, Fisker Automotive is planning four additional models of plug-in hybrids. All four models will use the same underpinnings, powertrain and hybrid technology from the Karma due out next year.Weve already heard of a Fisker Karma two-door convertible plug-in hybrid. That will also spawn a coupe Karma which will be followed by an SUV.Fisker plans on selling 15,000 units a year of the Karma hybrid sedan and has already received more than 800 orders for the car in the UK. Full technical details are still unavailable but Fisker has said that the Karma can do 50 miles on batter power alone with a 0-60 coming in less than 6 seconds. The 300 mile range plug-in hybrid will start at $80,000.Fisker Karma Hybrid Prototype : ?Source: Channel4Tags: Fisker,