Siemens' wind division plans to open blade and nacelle production facilities in China by 2010, says Andreas Nauen, head the wind power unit. It will be the company's first full turbine manufacturing capability outside Denmark, as its US plant makes only blades. Nauen says the company wants to be among the top three wind turbine manufacturers and aims to triple its production capacity to 4500 MW in 2011, representing a market share of 10-17%, depending on the rate of growth of the global wind market. The company ranks in sixth place today. Siemens is focusing on improving its 2.3 MW rated machine and extending its lifetime. "People think about the investment phase, but people have to live with these turbines for 20 years," says Nauen, noting that 95% of the Bonus machines erected in California in the 1990s are still running. Siemens acquired Bonus in 2004.