A very educational footage that explains in detail how solar energy is exploited and converted into electrical energy by solar cells.
http://rapidshare.com/files/59955058/BBC_2_-_Plugging_into_the_Sun.part1.rar
http://rapidshare.com/files/59961054/BBC_2_-_Plugging_into_the_Sun.part2.rar
http://rapidshare.com/files/59962393/BBC_2_-_Plugging_into_the_Sun.part3.rar