Siemens won an order to supply 448 wind turbines with a total capacity of 1,050 megawatts (MW) to U.S.-based MidAmerican Energy, which the German engineering group said was the largest single order for onshore wind power ever awarded.

The wind turbines, with a nominal rating of 2.3 MW each and a rotor diameter of 108 metres, are to be installed in five different projects in Iowa, Siemens said in a statement on Monday.

Siemens said it would also be responsible for service and maintenance of the wind turbines.

Siemens did not provide any financial details of the transaction.

By a rule of thumb, one megawatt of onshore wind capacity sells for 1 million euros ($1.37 million).