Opinion: How Electric Vehicles Can Make Everyone Happy
Ending subsidies, mandates and tariffs would expand use of EVs while letting people continue driving the cars they want.
WSJBy the end of the decade, an estimated 30 million electric vehicles could be on U.S. roads, up from about three million now. All those cars could store as much power as a day’s output from dozens of nuclear plants.
But of course those millions of cars may also put a strain on the grid, which is already getting increasing electricity demand from heat pumps and data centers, said Aseem Kapur, chief revenue officer at GM Energy, a unit of General Motors that provides services to electric vehicle owners. By helping to smooth out demand, “E.V.s can be a significant resource,” he said.
But a few problems need to be worked out before that vision can be realized.
Owners may not be eager to have their cars serve the grid because they are worried that constant charging and discharging will wear down their batteries faster.
Some energy experts said the degradation would be insignificant, especially if utilities drew on only a small fraction of a battery’s capacity. Renault is dealing with that issue by offering participants in its energy storage program the same eight-year, 160,000-kilometer warranty that people who don’t take part receive.
Another challenge is that some U.S. utilities and the state regulators that oversee them prefer running centralized grids in which energy flows almost entirely in one direction — from power plants to homes and businesses.
To overcome resistance from utilities, Maryland last month adopted a law that requires them to accommodate bidirectional charging schemes and provide financial incentives.
There is growing recognition that electric vehicle batteries are valuable investments that most owners will actively use for only a few hours a day.
“We want to unlock the full value of electric vehicle batteries,” said Gregor Hintler, chief executive of the Mobility House for North America.
If all the electric cars in New York City were used as storage, said Dr. Preindl, the Columbia professor, “those vehicles would be the most valuable power plant in New York by far.”
Consolidated Edison, the utility that serves New York City and some of its suburbs, is exploring how managing charging times and using electric vehicles for storage could help it cope with the fast growth of battery-powered cars.
Contrary to popular fears, “the grid is not going to collapse” because of electric cars, said Britt Reichborn-Kjennerud, the director of e-mobility at Con Ed. “The bigger concern is that if we don’t plan differently for this very fast-increasing load, the grid won’t be ready in time to support the transition.”
Con Ed supplies the power to a Bronx depot for New York City electric school buses, where Mobility House software allows more vehicles to use the facility.
Fleets of electric vehicles owned by businesses or governments are a particularly promising form of backup energy storage. Vans or trucks have large batteries and tend to have predictable routes and schedules.
Ford Pro, the commercial-vehicle division of Ford Motor, has begun offering free chargers to customers who allow them to be switched off during peaks in electricity demand. Owners also save on their electricity bills.
Ford provides the software to manage the chargers and accommodate customers’ driving needs, and it manages the relationship with utilities. Ford is testing the service in Massachusetts before expanding it to other states. The next step will be a two-way system that allows the vehicles to send energy to the grid.
“What smart charging can do is cut costs,” said Jim Gawron, director of charging strategy at Ford’s electric vehicle division. “That has been a key barrier for customers.”
A correction was made on June 5, 2024: An earlier version of this article incorrectly described how much money, according to a Renault executive, participants in a program that sends power from their car batteries to the grid could save on their home energy bills. Customers could cut their energy bills by 50 percent, not 15 percent.
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