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Spain is the world's fourth biggest producer of wind power, after China, the United States and Germany, with an installed capacity of 19,959 megawatts (MW) at the end of 2010, a rise of 1,609 MW forthe year.[1][2] Wind energy has consolidated as the third technology of the Spanish power system in 2010, having reached an output of 42,976 GWh, only overtaken by thermal gas combined cycle at 68,828GWh and nuclear that reached 61,944 GWh. In 2009, for the first time in the annual calculation, wind overtook coal that produced 33,844 GWh. In 2010, wind energy has covered 16% of the demand,compared to 11.5% in 2008 and 13.8% in 2009.[3]

The largest producer of wind power in Spain at the end of 2009 is Iberdrola, with 25.5 percent of capacity, followed by Acciona on 20.9 percent and NEOEnergia (EDP Renewables) with 8.3 percent.[4] On particular windy days, wind power generation has surpassed all other electricity sources in Spain, including nuclear.[5] On November 8, 2009 wind powerproduction reached the highest percentage of electricity production till then, with wind farms covering 53% of the total demand.[2][6] On November 9, 2010, the maximum power output was reached being14,960 MW.[7] On November 6, 2011 a new record was reached with 59% of power generated by wind power.

Spain is the world's fourth biggest producer of wind power, after China, the United States andGermany, with an installed capacity of 19,959 megawatts (MW) at the end of 2010, a rise of 1,609 MW for the year.[1][2] Wind energy has consolidated as the third technology of the Spanish power systemin 2010, having reached an output of 42,976 GWh, only overtaken by thermal gas combined cycle at 68,828 GWh and nuclear that reached 61,944 GWh. In 2009, for the first time in the annual calculation,wind overtook coal that produced 33,844 GWh. In 2010, wind energy has covered 16% of the demand, compared to 11.5% in 2008 and 13.8% in 2009.[3]

The largest producer of wind power in Spain at the...