Spain's Acciona, Iberdrola and Cobra Industrial Services, a unit of ACS, have qualified to compete for future contracts to provide wind energy to U.S. Army facilities as part of a program to expand the use of alternative energy at military bases and buildings.

Fourteen other companies, including EDF, Enel Green Power and Siemens, also qualified to bid for future contracts.

"The Department of Defense is the largest single consumer of energy in the world, and it is mandated to meet at least 25 percent of its facilities' energy needs with renewable energy by 2025," ACCIONA Energy North America said in a statement.

The Department of Defense plans to promote the development of 3,000 MW of generating capacity at Army, Air Force and Marine Corps facilities by 2025, supplying enough electricity for about 750,000 homes.

The Multiple Award Task Order Contract, or MATOC, program calls for signing long-term power purchase contracts covering wind, solar and geothermal power for up to 30 years.

The program has a budget of $2.5 billion out of the $7 billion total being spent by the Department of Defense on renewable energy projects using geothermal, solar, wind and biomass. EFE