Solyndra

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And you can see more from r80 energy saving lamp solar rock light tiffany style lamps mr16 high power light Red Flashing Light travel book light spot light bulbs led par20 light Table Lamp Lamp Solyndra is a manufacturer of thin-film solar cells. It is based in Fremont, California.Contents1 Technology 2 Performance and Product Characteristics 3 Management and Investors 4 Production 5 CIGS Competitors 6 References 7 External links // TechnologySolyndra designs, manufactures and sells solar photovoltaic (PV) systems comprised of panels and mounting hardware for large, low-slope commercial rooftops. The panels perform optimally when mounted horizontally and packed closely together, thereby, the company claims, covering significantly more of the typically available roof area and producing more electricity per rooftop on an annual basis than a conventional panel installation [1].The solar panels developed by the company are unlike any other product ever tried in the industry. The panels are made of racks of cylindrical tubes (also called tubular solar panels), as opposed to traditional flat panels. Solyndra rolls its copper-indium-gallium-diselenide (CIGS) thin films into a cylindrical shape and places 40 of them in each 1-meter-by-2-meter panel. The cylindrical solar panels (think of fluorescent tube lights...except in reverse) can absorb energy from every direction (direct, indirect and reflected light).Each Solyndra cylinder, which is one inch in diameter, is made up of two tubes. The company uses equipment it has developed to deposit CIGS on the outside of the inner tube, which includes up to 150 CIGS cells. On top of the CIGS material, it adds an "optical coupling agent," which concentrates the sunlight that shines through the outer tube. After inserting the inner tube into the outer tube, each cylinder is sealed with glass and metal to keep out moisture, which erodes CIGS' performance. The sealing technology is commonly used in florescent bulbs..[2].When combined with a white roof (which are the fastest growing segment of the commercial roof industry with over 1 billion square feet installed in 2008 and are required for any new commercial construction in California), the company claims that systems that employ the panels on a given rooftop can produce significantly more electricity in a given year. With a white roof, the panels can capture up to 20% more light than with a black roof.The other advantage claimed by the company is that the panels don't have to move to track the sun. The panels are always presenting some of their face directly perpendicular to the sun [3]. The daily production of flat solar panels has an output curve that has a clear peak while solyndra systems produce more power throughout the day.The Solyndra panels allow wind to blow through them. According to the company, these factors enable the installation of PV on a broader range of rooftops without anchoring or ballast, which are inherently problematic [4]. Solyndra claims that wind and snow loads are negligible and that its panels are lighter in weight per area but these claims are disputed.The tubular form factor was also considered by Nanosolar but discarded as impractical due to a host of technical and installation issues.[5]Performance and Product CharacteristicsThe company claims the cells themselves convert 12 percent to 14 percent of sunlight into electricity, an efficiency that Gronet said is better than competing CIGS thin-film technologies [6].The company has so far refused to discuss full panel performance, the typical industry metric and the one relevant for customers.The efficiency of a Solyndra panel depends on the specifics of the rooftop they are installed on. For instance, a non-white rooftop does not reflect light and thus may rule out the use of a Solyndra panel. Even an originally white rooftop may become somewhat off-white over a period of 25 years so that it is difficult to bank on a certain kWh performance output over the years.Solyndra recently installed a solar panel on the equator in Singapore. This system is part of an effort that began several years ago. In 2006, Solyndra began deploying demonstration systems around the world. The company recently revealed that the total count is now at 14 systems and that these systems are each instrumented with highly sensitive radiation, wind speed, temperate and humidity measurement devices to aid in the development of energy yield forecasting software tools.Further, the company will be referencing the 1 and 3 year roof material reflectivity measurements collected and documented for over 2500 reflective roof surfaces by the Cool Roof Rating Council.Management and InvestorsSolyndra is led by Chris Gronet. It has recently lost several of its founding members.[7], and has been reported to have had difficulties closing its most recent financing.[8]The company claims it has received a total of $600 million since 2005 in venture capital to develop its cylindrical CIGS...(and so on)


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