It seems that this article got little notice. See URL below.
Elon Musk has the technical ability to engineer his own solar vehicle but in an effort to learn from others Tesla has sponsored the Crusier Class of the world Solar Challenge and in 2015 Stella Lux set a record during the race by going 932 miles on one charge over two days. This includes energy from the solar panels while racing. This feat is the high point for the solar team at Eindhoven University in Holland. Because of this success of the Dutch the rules were changed in 2017 reducing the area of the solar panel. The Dutch answer was to increase the passenger load to 5 from 4 and decrease drag producing a vehicle almost as good as Stella Lux and still winning the class. The only question is when will Musk decide to mass produce a similar practical family vehicle. In my opinion the World Solar challenge should drop all classes that race rolling ping pong tables and concentrate on mass producible practical passenger vehicles. Maybe even an RV and truck class. The below URL contains s
ome of his comments. Lawrence Rhodes