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The solar power plant Abengoa Solar will build in Gila Bend, Arizona, won’t rely on fancy photovoltaic panels. No, it uses pretty much the same trick your evil ass used on bugs and leaves way back when: focusing sunlight to create high heat. In this case, mirrors focus the sun’s rays into tanks of heat-transfer oil, heating it to about 400°C, boiling water for a steam turbine.

Energy can be generated even when the sun isn’t shining—in the case of Abengoa’s Arizona plant, part of the heat doesn’t directly boil water but is transferred to molten salt tanks, where it can be stored to power the turbine for up to six sunless hours. The plant goes operational in 2011, and will generate 280 megawatts, enough to provide energy for 70,000 homes, customers of the Arizona Public Service in Phoenix.

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