How often do you fill up with petrol or diesel at a motorway service station? Many of us prefer to fill up ahead of a long journey or when we reach our destination, as filling up at a motorway service station is prohibitively expensive. The latest EVs can cover more than 300 miles between charges (and this is increasing), which'll be sufficient for a lot of journeys by most people. Charging at a motorway service station (which, like filling up with petrol or diesel, is more expensive than charging elsewhere) will be seen as an emergency back-up option.