Epidemiological Analysis of Degradation in Silicon Photovoltaic Modules

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概要

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• We have studied the power reduction rate and degradation modes of crystalline-silicon photovoltaic modules, which had been operated in an outdoor field for about 10 years. We measured the electric parameters of the modules before and after 10-year operation, and classified our photovoltaic modules into four groups that were manufactured by four manufacturers. Analyzing the age-related decreases in electric parameters of the modules, we found two dominant degradation modes by correlation analysis of the electric parameters. In addition, we found delamination mode degradation by visual inspection. We have recognized a degradation rate in terms of the statistical distribution of the module power reduction. The power reduction rate was found to be an average of 4.7% for ten years.

• 2012-10-25

著者

• Nonomura Shuichi

  Faculty Of Engineering Science Osaka University

• Sakamoto Sadao

  Faculty of Engineering, Gifu University, Gifu 501-1193, Japan

• Kobayashi Tomonao

  Faculty of Engineering, Gifu University, Gifu 501-1193, Japan

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• Determination of the Built-in Potential in a-Si Solar Cells by Means of Electroabsorption Method
• Optimizations of the Film Deposition Parameters for the Hydrogenated Amorphous Silicon Solar Cell : III-4: AMORPHOUS SOLAR CELLS : Device Performances
• Study of Drift Type Photovoltaic Effect in Amorphous Silicon p-i-n Junction Structure : III-3: AMORPHOUS SOLAR CELLS : Device Physics
• Failure Assessments for Outside-Exposed Photovoltaic Modules (Special Issue : Photovoltaic Science and Engineering)
• Epidemiological Analysis of Degradation in Silicon Photovoltaic Modules

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