I mentioned the Oppenheimer upgrade of Suntech Power (STP) this morning on Green Stocks @Twitter, but the firm has rating and price target updates on other solar stocks as well.  Hat tip to Street Insider for the heads up.

Bullish on Yingli Green Energy (YGE) and gets upgrade from Outperform to Perform and $17 price target (about 30% higher).  Want more YGE analysis?

Downgrades Canadian Solar (CSIQ) from Outperform to Perform and lowered and slashes price target from $31 to $19. Macquerie slashed the price target too, but both firms still have price targets above where CSIQ currently trades.  Get more CSIQ analysis here.

Maintains Market Perform on First Solar (FSLR) and Sunpower (SPWRA) and has price targets of $18 and $133 respectively.
Maintains Outperform on Solarfun (SOLF), but lowers price target from $13.50 to $12. More SOLF analysis here.