UPDATE 2-Toshiba's Westinghouse to file for Chapter 11 -Japan govt
* Toshiba board approved filing at board meeting - Nikkei Westinghouse nuclear projects dogged by delays, cost overruns (Recasts with Japan government comment)
* Deal for 20 megawatts of PV modules
* Borrego doubles purchase volume in 2011
Feb 9 China's Yingli Green Energy said its unit signed an agreement with Borrego Solar Systems to supply the San Diego-based company 20 megawatts of photovoltaic (PV) modules in 2011.
The modules, which turn sunlight into electricity, will be used for commercial solar projects across the United States.
Yingli, based in Baoding, China, is one of the world's largest makers of solar equipment.
Yingli Green's stock closed at $11.79 on Tuesday on the New York Stock Exchange. (Reporting by Mayuresh Tungare in Bangalore; Editing by Prem Udayabhanu)
TOKYO, March 29 Shorter-dated Japanese government bond prices slipped on Wednesday as the market took cues from an overnight retreat by U.S. Treasuries, while the longer-dated maturities gained on month-end investor demand.