Chrysler Group LLC will partner with the U.S. Department of Energy to deliver five demonstration fleet Ram 1500 plug-in hybrid electric pickup trucks to CenterPoint Energy’s electric utility in Houston. As part of a national strictly demonstration fleet of 140 vehicles, the Ram 1500 PHEVs will be used during the next three years to evaluate customer usage, drive cycles, charging, thermal management, fuel economy, emissions and impact on the region’s electric grid.