• Non-destructive techniques for quality control of photovoltaic modules

    Non-destructive methods for measuring photovoltaic modules are discussed in this paper, with the aim of comparing different quality-assurance methods for different module technologies (e.g. crystalline and thin-film technologies: a-Si, CdTe, CIS). For a complete quality control of PV modules, a combination of fast and non-destructive methods was investigated. In particular, camera-based measurements, such as electroluminescence (EL) and infrared (IR) technologies, offer excellent possibilities for determining production failures or defects in solar modules, which cannot be detected by means of standard power measurements. These methods are applied effectively in quality control and development support, and EL is already an important characterization tool in industry and research. Most short circuits reduce the voltage in their surrounding area and appear dark in EL images. However, as this failure is not always critical and apparent, short circuits are only precisely identifiable in combination with IR measurements. Therefore, to quickly detect at high resolution the most common defects in a PV module, a combination of EL and IR measurements is advisable.

  • Studying the lifetime of crystalline PV modules by interpreting the acceleration test data with stat

    Crystalline silicon solar modules installed in the field are exposed to atmospheric conditions and experience stress, which induces a wear-out phenomenon in various parts of the modules and degrades performance over time. The performance eventually reaches a point where the output power falls below an acceptable level. Thermal cycling (TC) and damp heat (DH) are two important reliability tests for estimating infant failures related to materials and the manufacturing process, as well as providing the information on performance degradation with respect to time. In this study, modules composed of 156mm × 156mm multicrystalline silicon cells were subjected to TC and DH tests. By applying acceleration models, such as the Norris-Landzberg model for TC and the Hallberg-Peck model for DH, the minimum guaranteed life was calculated. The electrical and reliability results were interpreted and explained on the basis of the respective models.

  • A novel glue-membrane integrated backsheet for PV modules

  • Life cycle analysis of modules: A multicrystalline silicon case study Trond Westgaard, Renewable Ene

  • Snapshot of spot market for PV modules – quarterly report Q3 2011

  • A new DSC method for the quality control of PV modules: Simple and quick determination of the degree

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Publications

  • Photovoltaics International 15th Edition

    Photovoltaics International 15th Edition

    The 15th edition of Photovoltaics International hopes to bring some optimism to 2012 by tackling the key factors on how to cope with the current situation. Contributions come from MIT on using TCAD as a viable method for modelling metal impurity evolution; Alternative Energy Investing presents a comprehensive look at materials cost; and efficiency improvements are on offer by ECN. REC Solar and Tata BP Solar report on module lifetime and IMS Research gives us a brief rundown of 2012 global market expectations.

  • Photovoltaics International Lite, Volume 05 - 2011

    Photovoltaics International Lite, Volume 05 - 2011

    This digital interactive Lite sees Tom Cheyney follow Agua Caliente’s progress on becoming one of first truly utility-scale PV power farms, where 40–50MW (AC) will be commissioned by the end of the year. We also feature one of the world’s largest silicon thin-film PV power plants, Avenal; a report on warnings of the collapse of module prices from Solarbuzz and PI-Berlin presents tips on PV module testing. A print version of this edition will be distributed at Solar Power International 2011 in Dallas, Texas.

  • Manufacturing The Solar Future: The 2012 Production Annual

    Manufacturing The Solar Future: The 2012 Production Annual

    Manufacturing the Solar Future 2012, the second in the Photovoltaics International PV Production Annual series, delivers the next installment of in-depth technical manufacturing information on PV production processes.

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