As Curious Georgie observes, this article ignores the fact that the vast majority of EV owners charge their vehicles overnight, when demand for electricity is at its lowest.  This helps distribute the load on the grid and saves money with off peak rates.  Coal plants are used to meet peak demand by industry and businesses during the day, not EV owners charging at night.  The inevitable decentralization of the electrical grid will further reduce the need for unnecessary expansion or increase in grid capacity (government mandated solar panel and battery installation on residential homes, as Fremont CA is doing) and the rebranding of electrical monopolies into energy suppliers (e.g. Green Mountain Energy in Vermont) that assist homeowners in getting off the central grid.  This further reduces centralized electrical supply.  Soon, large businesses and heavy industry will be the only customers for grid electricity.  The economics no longer favour large electrical monopolies.