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Bill Gross was famous during the Internet boom as the founder of Idealab, an “incubator” that hatched more than 75 companies. His best-known investment was, which created an online marketplace where advertisers bid for primacy in the results of Web searches–the innovation, now called “keyword advertising,” that made Google wildly rich (with the all-important tweak that sponsored and algorithmically derived results should be clearly separated). (which became Overture Services) was sold to Yahoo for $1.6 billion in 2003.

Of course, Gross (and Idealab) never really went away. Among Gross’s recent investments is eSolar, a TR50 startup of which he is chairman. The company hopes that with its technology, solar thermal energy–heat and electricity generated from sunlight using mirrors–will cost no more than coal-generated power. Jason Pontin, Technology Review’s editor in chief, met with Gross at the 2010 annual meeting of the World Economic Forum in Davos, where eSolar was honored as a Technology Pioneer.

TR: Why did eSolar choose solar thermal power, which has been little implemented beyond a handful of utility plants?

Bill Gross: We want to compete with coal. We looked at all of the renewable technologies that can be deployed at scale, and they were all variations of solar thermal. It has the capacity for scale because all the materials are readily available: there’s enough steel and glass to power the planet with solar thermal. Solar thermal’s potential has, so far, been theoretical, but we’re going to try to make it a reality.

TR: But how are you different from established solar thermal companies, some of which are almost 20 years old?

BG: Abengoa [Solar, a Spanish company founded in 1984] has made many solar towers, and there have been others deployed at scale. But there’s been no disruption [of fossil-fuel-generated power]. The problem is, there’s been too much civil construction: if you want solar thermal to disrupt the energy market, you need its parts to be mass-produced like an automobile. A 200-meter-tall solar tower [upon which the mirrors are focused] is a skyscraper, and it takes a year to build. So we decided to go with small towers and small mirrors, all of which can be prefabricated in a factory. We have a two-piece tower that gets erected in one day. All of our mirrors, all of our frames, fit in a shipping container, which means you can make them in China and ship them anywhere. When your stuff is smaller than a container, you switch from a few big moving elements to hundreds of thousands of small moving elements. That’s the disruptive switch we’ve made–and that posed a new challenge.

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Credit: Darrin Vanselow
Video by Glenn Winters

Tagged: Business, Energy, eSolar

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