I praise the courage of the boy to invest such a big amount to build
something, which we most of the time do not think about. But i agree
with pire. this video explains similar car. I sajha don;t allow me to
embed video but this video talks in detail about such one homemade
solar car. its interesting to watch and know some basics. Search " Infinity Miles Per gallon: Art Haines and the Solar car". You will get the video.

sunnev dot com here is the link to the website of that solar car builder and actually he is selling it now as a kit. its quite interesting to know.