The contract also includes a five-year premium service agreement with an option for renewal by up to further ten years.
The Midtfjellet wind farm is being built on the Norwegian island of Stord.
The deployment of the 52.5MW power project will start in summer 2012, with completion scheduled for 2013.
Certified for wind class IEC 1, the N90/2500 turbine satisfies these requirements, promising an optimum yield.
The 21 wind turbines will be able to generate over 170,000MWh of clean electricity per year.
