Parked Electric Cars Earn $1,530 From Europe’s Power Grids

Electric car owners are earning as much as $1,530 a year just by parking their vehicle and feeding excess power back into the grid. Trials in Denmark carried out by Nissan Motor Co. and Italy’s biggest utility Enel SpA showed how batteries inside electric cars could help balance supply and demand at times and provide a new revenue stream for those who own the vehicles.