The guy fills the back seat with batteries making this far from practical.
If we are just talking about electric things with 4 wheels doing highway speeds then: By 2005, several teams were handicapped by the South Australian speed limit of 110 km/h (68 mph), as well as the difficulties of support crews keeping up with 130 km/h (81 mph) race vehicles. It was generally agreed that the challenge of building a solar vehicle capable of crossing Australia at vehicular speeds had been met and exceeded.https://en.wikipedia.org/wiki/World_Solar_Challenge
If we are just talking about electric things with 4 wheels doing highway speeds then: By 2005, several teams were handicapped by the South Australian speed limit of 110 km/h (68 mph), as well as the difficulties of support crews keeping up with 130 km/h (81 mph) race vehicles. It was generally agreed that the challenge of building a solar vehicle capable of crossing Australia at vehicular speeds had been met and exceeded. https://en.wikipedia.org/wiki/World_Solar_Challenge