Why EVs Won’t Crash the Electric Grid

If everyone has an electric car, will the electric grid be able to support all those cars being recharged?

We can already see a preview of our electric future in Norway, one of the countries with the highest share of EVs. More than 90 percent of new cars sold in the country were plug-in electric, according to the latest data, from May. More than 20 percent of the country’s overall vehicle fleet is electric, a share expected to rise to one-third by 2025. So far, the grid has essentially shrugged it off. “We haven’t seen any issue of the grid collapsing,” says Anne Nysæther, a managing director at Elvia, a utility serving Oslo and the surrounding areas with the nation’s largest concentration of EVs. The country, now almost entirely powered by renewables, has easily met the extra demand from EVs while slashing greenhouse gas emissions. That’s good, because Norway will ban all new petrol and diesel cars by 2025…

To electrify everything — all these expected EVs, heat pumps and other big power draws — [the U.S.] will need to start building up our grid, according to Jesse Jenkins, an energy modeling and engineering expert at Princeton University. The United States must at least double its electricity supply by 2050, while stringing up 75,000 miles of new high-voltage lines by 2035, the equivalent of 15 round trips from Los Angeles to New York City, and connect new wind and solar generation to the grid. That sounds like a lot. But something like this has already been done. From the 1970s to the 1990s, the U.S. built new transmission capacity at a speed close to what is required today, writes Jenkins in Mother Jones, even as electricity demand grew.