Ivanpah solar plant starts delivering electricity (pictures)

A solar thermal plant -- owned by NRG Energy, Google, and BrightSource Energy -- is pumping power to California's electric grid.

Carrie Mihalcik

Feb. 13, 2014 4:48 p.m. PT

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BrightSource Energy

Ivanpah solar thermal plant

The Ivanpah Solar Electric Generating System -- jointly owned by NRG Energy, Google, and BrightSource Energy -- started delivering power to California's electric grid on Thursday. The solar thermal plant, which covers approximately 3,500 acres in Southern California, creates high-temperature steam to drive power generators.

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BrightSource Energy

Three towers

The plant has three 450-foot high towers that can produce a gross total of 392 megawatts of solar power, according to plant operator NRG Energy.

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BrightSource Energy

Many, many mirrors

Surrounding the towers are more than 300,000 software-controlled mirrors.

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BrightSource Energy

'Power tower' tech

The mirrors reflect the sunlight to boilers at the top of the towers, which creates high-temperature steam that then turns a turbine, according to BrightSource.

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BrightSource Energy

Pumping electricity

The Ivanpah plant generates enough electricity to supply 140,000 homes, said NRG Energy.

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BrightSource Energy

Pipes

The plant accounts for nearly 30 percent of all solar thermal energy in the US and is the largest solar project of its kind in the world, according to NRG Energy.