Oslo, Norway, September 21, 2009 - REC today announced the results of 
a study performed by Fraunhofer Institute, the leading European solar 
technology research institute, placing REC solar modules ahead of two 
leading module brands in a year-long performance ratio study. The 
study was commissioned by REC. The study also demonstrated that REC's 
use of the Sunarc* anti-reflective treatment on the module glass 
increases energy production. 
 
During a period of 12 months Fraunhofer studied the performance of 
two arrays with REC modules, one array with modules from a leading 
European producer, and one array with modules from a leading Chinese 
producer. During the test, the REC modules recorded a performance 
ratio 4.8 percent higher than the Chinese modules and 1 percent 
higher than the European modules. "The higher performance ratio 
translates into increased production of electricity and additional 
money generated for the owner of the system with REC modules", said 
Åsmund Fodstad, VP Sales & Marketing. REC provides a 25-year power 
output guarantee on its modules. 
 
The performance ratio is calculated by comparing the nameplate 
capacity of a solar module with the actual power output of the 
system. Performance ratio is widely considered the best measure of 
the quality of a module because all components and their interactions 
are taken into consideration. 
 
The Fraunhofer study also demonstrated that REC's use of 
anti-reflective treatment on the module glass increases energy 
production and performance ratio. The test evaluated two arrays of 
identical REC modules, one with anti-reflective treated glass and one 
without. The modules with anti-reflective treated glass showed a 
higher performance ratio compared to modules with untreated glass. 
The anti-reflective treatment reduces the reflectivity of the glass 
surface, allowing more sunlight to enter into the solar cells for 
conversion to electricity. The treatment has been applied on all 
modules manufactured by REC since 2007. "This study confirms that the 
anti-reflective treatment of the glass used in the REC modules 
contributes to excellent performance in a wide range of sunlight 
conditions," Fodstad said. The REC modules are optimized for low 
light conditions such as sunrise and sunset, in effect waking up 
early in the morning and going to sleep late in the evening. 
 
About REC 
REC is the leading vertically integrated player in the solar energy 
industry. REC Silicon and REC Wafer are among the world's largest 
producers of polysilicon and wafers, respectively, for solar 
applications. REC Solar is a rapidly growing manufacturer of solar 
cells and modules, and is also engaging in project development 
activities in selected segments of the PV market. REC had revenues of 
NOK 8 191 million and an operating profit of NOK 2 529 million in 
2008. Close to 3 000 employees work in REC's worldwide organization. 
See www.recgroup.com for more information about REC. 
 
 
Media Inquiries 
For more information, quotes or photography, please contact Vice 
President of Sales & Marketing, Åsmund Fodstad at + 47 954 23 070, or 
aasmund.fodstad@recgroup.com 
 
* Sunarc is a registered Community Trade Mark within EC and a 
registered trademark in the United States and other countries. 
 
 
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solely responsible for the content of this announcement. 
 
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