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CHAPTER ELEVEN
Wind Energy
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Exhibit 11-7

Evolution of U.S. Commercial Wind Technology
Year Rotor Diameter Capacity Rating
1980 10 meters 25 kW
1985 17 meters 100 kW
1990 27 meters 225 kW
1995 40 meters 500 kW
1998 50 meters 750 kW
2001 62 meters 1.2 MW
2003 70 meters 1.5 MW
2006 86 meters 2.5 MW
2008 100 meters 3.6 MW

Sources: National Renewable Energy Laboratory, California Energy Commission and various wind turbine manufacturers.

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