According to StreetInsider.com, Jefferies is out with several solar upgrades following the two week plunge. 

SunPower (SPWRA) upgraded from Hold to Buy, but price target lowered from $30 to $29. Shares are up 2.5% to $21.75 this morning. Shares are up about 3% in premarket trading.

Suntech (STP) upgraded from Underperform to Hold with a $12 target. Shares are basically flat in premarket trading.

Solarfun (SOLF) upgraded from Underperform to Hold with a $7 target. Shares up about 1%.

China Sunergy (CSUN) upgraded from Underperform to Hold. Price target raised from $4 to $4.50. Shares up about 3%.