<Tr> <Td> Peñascal Wind Farm </Td> <Td> 404 </Td> <Td> Mitsubishi </Td> <Td> Kenedy </Td> </Tr> <Tr> <Td> Roscoe Wind Farm </Td> <Td> 781 </Td> <Td> Mitsubishi </Td> <Td> Nolan </Td> </Tr> <Tr> <Td> Sweetwater Wind Farm </Td> <Td> 585 </Td> <Td> GE Energy / Siemens / Mitsubishi </Td> <Td> Nolan </Td> </Tr> <P> Wind power in California has doubled in capacity since 2002 . With a total of nearly 4,000 megawatts installed, as of the end of 2011, wind energy now supplies about 5% of California's total electric power needs, or enough to power more than 400,000 households . The amount varies greatly from day to day . In 2011, 921.3 megawatts were installed . Most of that activity occurred in the Tehachapi area of Kern County, with some big projects in Solano, Contra Costa and Riverside counties as well . After 2014, California ranked second nationwide in terms of capacity, behind Texas with a capacity of 5,917 MW . </P>

How many land wind power mills are in the us