When an EV is being charged, alternating current (AC) electricity from the grid is converted to direct current (DC) so it can be used by the car battery. This is done by a ‘convertor’ which is located in the car or in the charger. This is unidirectional charging, where energy flows one way from the grid to the car.Bidirectional EV charging is essentially ‘charging’ that occurs two ways (back and forth). Energy will flow from the grid to the car or it can be sent back to the grid or power other d...