SunPower Co. (NASDAQ: SPWRA), Yingli Green Energy Hold. Co. Ltd. (NYSE: YGE) Upgraded

The solar sector had a little positive news today, as SunPower Co. (NASDAQ: SPWRA) and Yingli Green Energy Hold. Co. Ltd. (NYSE: YGE) were upgraded by several analysts, with Yingli getting positive coverage from three separate companies.

Yingli is getting a boost from its second-quarter report Friday, which outperformed analysts' expectations. That resulted in Piper Jaffray (NYSE:PJC), Avian Securities and HSBC (NYSE:HBC) all upgrading the company.

Auriga Securities’s Hari Chandra Polavarapu boosted his rating on Sunpower (SPWRA) from "Hold" to "Sell," saying the plunge in share price of 40 percent since he began coverage in the latter part of July is overdone. He has a price target of $14 on Sunpower. Even so, Polavarapu won't raise his rating on Sunpower to a buy until the cost issues are resolved.

Yingli was trading at $5.56, up $0.30, or 5.70 percent, as of 1:43 PM EDT. SunPower was trading at $13.62, gaining $0.05, or 0.37 percent.