An entrance to German solar power equipment company Q-Cells is pictured at a factory site near Bitterfeld, April 3, 2012. Q-Cells is to file for insolvency, the company said on Monday, becoming the most prominent victim so far in an industry shake-out that has already claimed some of its rivals in Germany and the United States. REUTERS/Tobias Schwarz (GERMANY - Tags: BUSINESS SCIENCE TECHNOLOGY)