Spanish power company Iberdrola said it plans to invest $8 billion (5.1 billion euros) in the US between 2008 and 2010. The Bilbao-based firm is aiming to have a 15 per cent share of the wind power market in the US by 2010, it added. It had a wind power production capacity of 2,400 megawatts in the US at the end of March and it expects to reach 3,600 megawatts by the end of the year, the statement added. Iberdrola chairman Mr Ignacio Sanchez Galan has said he considers the US as the company's most exciting growth market.