Infigen Energy (ASX: IFN) is has executed service and maintenance agreements with Vestas, Australian Wind Technology Pty Ltd (Vestas) for each of Infigen’s six operating wind farms. The agreements cover 556.6 MW of installed capacity comprising 256 turbines across the three stages of the Lake Bonney wind farm in South Australia, the Alinta wind farm in Western Australia and the Capital and Woodlawn wind farms in New South Wales. Under the agreements, Vestas will provide turbine maintenance services and replacement components for the turbines from 1 January 2018 for a period of between 7 and 15 years, depending on the wind farm. Vestas will also provide scheduled maintenance services for the balance of plant at those wind farms. Infigen will otherwise be responsible for maintenance of the balance of plant.