The SunPower system has a sensor that detects the sun in the morning and motors position the panels to face the sun. Over the course of the day, the panels follow the sun to optimize power production. This solar farm will have single-axis tracking, but concentrating photovoltaic systems have more complicated two-axis tracking. That's needed to optimize the panel's direction so that it faces the sun as directly as possible.
November 28, 2011 4:00 AM PST
Photo by: Martin LaMonica/CNET
| Caption by: Martin LaMonica
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