[The Motely Fool] Over the next several years, industry analysts peg the growth of the solar market at around 50% per annum. In a market moving that fast, it’s develop or die. Due to the pace of change, it’s hard to imagine a more perfect match for the Fool’s series on innovative business sectors. To do justice to developments in the solar area, I’ll break my overview into three parts. We’ll begin with standard photovoltaics (PVs), before getting into the more exotic thin-film and concentrated solar stories.