solar panel by sunpower
Photo: Courtesy of Sunpower
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Tech: Put the Squeeze On Photons

E19/238 Solar Panel by Sunpower

We've been waiting for a breakthrough in residential solar, and here it is. These panels convert up to 19½ percent of the sunlight they receive into electric power, far more than any other panels. Specially shaped solar cells that occupy 3 percent more surface area than standard cells deliver up to 238 watts per panel.

About $15,000 for a 2.5-kilowatt system (sans subsidies); sunpowercorp.com
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