Any way you slice it, solar investing has been on a tear for the last year. Of the 69 solar stocks that the Roen Financial Report tracks, three-quarters are up for the year. On average solar stocks have gained 85 percent for the year, with 60 percent of solar companies up in the double digits. What is most impressive is that the top 17 solar stocks are all up in the triple digits, and one, Canadian Solar Inc. (CSIQ), is up 903 percent.