Think of the renewable-energy market as an oligarchy, with a handful of countries making up by far a super majority. The top 10 wind countries, for example, represented a whopping 87.8 percent of the wind market last year, according to the Global Wind Energy Council (GWEC). And in solar, even just the top two markets -- Spain and Germany -- accounted for 72.9 percent of the total world market, with the top 10 making up 96.5 percent, according to the European Photovoltaic Industry Association.

"I think the solar industry will be really surprised at how low solar prices can go. "It will open up new markets that we haven't even considered." -- Jenny Chase, Manager, Solar Insight Service, New Energy Finance