Jigar Shah, CEO of the Carbon War Room, and founder of SunEdison has his finger on the pulse of clean energy and solar financing. His insight - from an excellent CleanTechnica article - is worth quoting at length. It's a great description of why financial powers are finally shifting allegiance toward solar and other clean energies - and the secret Warren Buffet already knows.
ps. This may be why Buffett just announced that his MidAmerican Energy subsidiary is forming a Renewables unit to encompass some of his new major solar and wind farm acquisitions.