A 2012 Chevrolet Volt electric vehicle is parked at the solar-powered electric charging station designed by Sunlogics in the parking lot of General Motors Co's assembly plant in Hamtramck

 
A 2012 Chevrolet Volt electric vehicle is parked at the solar-powered electric charging station designed by Sunlogics in the parking lot of General Motors Co
A 2012 Chevrolet Volt electric vehicle is parked at the solar-powered electric charging station designed by Sunlogics in the parking lot of General Motors Co's assembly plant in Hamtramck, Michigan in this file photo taken August 9, 2011. General Motors Co posted a weaker-than-expected fourth-quarter profit as disappointing performance overseas offset strong results in North America. REUTERS/Rebecca Cook/Files (UNITED STATES - Tags: TRANSPORT ENERGY ENVIRONMENT BUSINESS)