Oliver Koehler

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Over the last years SunPower has steadily improved the absolute module efficiency through a combination of cell and module design improvements [1]. Between 2007 and 2011, such changes have enabled a 1.4% absolute reduction in cell to module conversion efficiency loss, increasing module power by 7% and enabling the production of a 20% efficient module.(More)
During the last years the usage of 3D applications in GIS is becoming more popular. Since the appearance of Google Earth, users are familiarized with 3D environments. On the other hand, nowadays computers with 3D acceleration are common, broadband access is widespread and the public information that can be used in GIS clients that are able to use data from(More)
This paper discusses four interrelated topics regarding energy production from photovoltaic systems and prediction of that energy production. Together these topics support high kWh/kWp performance of SunPower modules and accurate prediction of that performance across a wide range of applications. The first topic is an analysis of attributes which influence(More)
This paper describes photovoltaic modules in high- volume production with world-record efficiency. SunPower Corporation has achieved a total-area efficiency of 18% by using proprietary back-contact silicon cells and new module design features. The modules have been certified under IEC61215 edition 2 and UL1703, are free of hazardous materials, and have(More)
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