Solar energy ETFs -- the biggest losers the past three years -- have exploded in the New Year, suggesting their fortunes may have finally brightened. Guggenheim Solar (TAN) has flared up 13.8% so far this year. Its less popular counterpart, Market Vectors Solar Energy ETF (KWT) surged 17%. Both ETFs collapsed 33% last year, 64% in 2011 and 29% in 2010. Both broke above their long-term, 200-day moving average for the first time since May 2011.