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.
Technology linking vehicles to the grid marks another challenge for utilities already struggling to integrate wind and solar power into their distribution system. As the use of plug-in cars spreads, grid managers will have to pay closer attention to when motorists draw from the system and when they can smooth variable flows.
“If you blindingly