It could challenge the lead in offshore wind accrued by Siemens, which has almost two-thirds of installed capacity, according to BNEF. MHI Vestas is in second place, with 19 percent. A Siemens spokesman said a 7-megawatt turbine the company is working on has a "track record of reliability" that will reduce costs for customers. It won its biggest contract for the machine on Wednesday from the Spanish utility Iberdrola, which will buy 102 turbines valued at as much as $1.2 billion (825 million pounds). The 80-meter blades of the MHI Vestas V164 make the machine almost as high as the Times Square Tower in New York, and are so large that they were "a nightmare" to transport on narrow country roads, Jens Tommerup, chief executive officer of the venture, said in an interview. This prototype is built for use offshore and has been tested on land since January 2014 at the wind turbine field in Osterlid, managed by the Technical University of Denmark. The goal is to spot faults before they enter service.