Editor's Note: This content was originally published on Benzinga.com by The ETF Professor Benzinga Staff Writer. While the sector still has its detractors there is no getting around the fact that 2013 has been quite kind to solar stocks and the ETFs that house them. Buoyed by an array of factors ranging from China doing everything in its power to prop its ailing solar companies to Warren Buffett's Berkshire Hathaway (NYSE:BRK.A) acquiring a stake in a solar project to takeover rumors solar stocks have soared. Heading into Tuesday's trading session the Guggenheim Solar ETF (NYSEARCA:TAN) was up 21.1 percent ...