What V2G Tells Us About EVs and the Grid: Vehicle-to-grid technology adds another layer of complexity to the electric-vehicle transition

As the number of electric vehicles on world's roads explodes, utilities are grappling with increasing demand while simultaneously having to stabilize their grids where more intermittent renewable-energy sources like wind and solar coming online. For looking for ways store power later use, all those shiny new EVs might look rolling batteries that they can not only charge but also draw from when exceeds supply. That's promise vehicle-to-grid (V2G) technology.