Last week’s Get Some Sun webinar featured Galen Barbose from Lawrence Berkeley National Lab discussing the results of Tracking the Sun, an assessment of the changing cost of going solar across the U.S. This is the fourth edition of this annual report, and each year we eagerly await its release to see hard data on just what kind of cost reductions the U.S. solar industry has achieved. This edition delivered in a big way . . .

Examining more than 115,000 PV systems installed between 1998 and 2010 across 42 states, the report’s key findings include:

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Not to be confused with Concentrating Solar Thermal Power (CSP), Concentrating Photovoltaics (CPV) systems use mirrors or lenses to focus the sun’s light onto a small area of photovoltaic material. By focusing the sun’s light (usually by several hundred times, but potentially by up to 1000 times) in order to reduce the amount of expensive semiconductor material that is needed to produce a usable quantity of energy, and so reduce the overall costs of the system.

While CPV has had its supporters for many years, it has so far made little impact on the global photovoltaic market. Nonetheless, despite this relatively slow progress, a series of recent developments and the possibility of rapidly falling costs mean that the sector is once again attracting attention.

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SunPower signs 15-Megawatt solar panel and tracker technology supply agreement with Mahindra in India

SunPower Corp. (San Jose, Calif.) on August 4th, 2011 announced that Mahindra EPC Services Pvt Ltd. has ordered 15 megawatts of SunPower solar photovoltaic (PV) panels and SunPower T0 Tracker technology for delivery by the end of this year.

The solar panels will be used by Mahindra for building multiple grid-connected solar power plants in India in the Punjab, Rajasthan and Gujarat regions.

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Japanese firm develops 'sun-tracking' solar power device  2

Researchers at a Japanese firm have successfully used moving mirrors that track the sun throughout the day to develop a solar power device with double the generating power of current models.

Smart Solar International, a University of Tokyo spin-off that developed the new device, said it would start commercial production of the system in Japan in August.

The device features a row of aluminum mirror bars that can slowly rotate as the sun moves across the sky and reflect its light back onto a central tube that is packed with high-performance, multi-layered solar cells.

The system requires far less expensive silicon than traditional photovoltaic cell panels, and it has a system for preventing overheating that channels any extra warmth for heating water.

 

“You can get both electricity and heat from the same device,” said Takashi Tomita, who heads the spin-off University of Tokyo’s Research Center for Advanced Science and Technology. The company expects to start marketing operations by October and has targeted Asia and Middle East sales by 2014.

 

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