SustainableJeroen writes "On Sunday morning (Australian time), October 6th, 40 solar-powered vehicles from 24 countries will depart from Darwin and make their way south along the 3000km Stuart Highway towards Adelaide in the 2013 World Solar Challenge. About half of the vehicles compete in the Challenger class, the class which features what many people will recognize as typical solar racing cars: flat, UFO-like vehicles, built exclusively for efficiency and speed. For the first time, however, much more practical vehicles will race each other in the new Cruiser class. These vehicles will seat two, three of four people and be road legal. In both 2009 and 2011, the University of Michigan Solar Car Team finished third, Nuon Solar Team finished second and Tokai University finished first. The fastest vehicles will be expected to reach Adelaide on Thursday or Friday, depending on the weather."