Read this this morning: http://www.bbc.com/autos/story/20150515-where-is-my-solar-car Most people, when they think about a solar car, think of this: As they should. In this case, a solar car is a vehicle for one person, largely made out of balsa wood, sitting on three bicycle wheels, and really just a platform for holding solar cells. There are usually not any batteries, so this can only run while the sun is shining (rather brightly, I might add). The range of such a vehicle, while technically unlimited, is really only as far as you can drive whilst the sun is shining. And given a top speed of around 60 mph (that's the record speed - your actual speed may vary), and assuming that you could only drive for the brightest 4-6 hours per day, you're looking at three or four hundred miles. Of course, if the sun's not shining, you're not going anywhere. Batteries are available, which add weight, but also overcome the problem of range and bad weather. Safety is also a ...