Western Power Distribution (WPD) has announced plans to develop a miniaturised off-the-shelf substation for connecting electric vehicle (EV) chargers at motorway service stations. The “plug and play” substations will have a capacity of up to 20MW and will be compressed into two units, each the same size and shape as a standard shipping container. Utility Week speaks to Paul Jewell, DSO development manager and EV lead at WPD about the project.