24 September 2013 Methods to evaluate the effect of water ingress: towards ultra-reliable PV modules
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A durable encapsulation scheme is of paramount importance to achieve long lifetime of the solar modules. Among other, water vapor and acetic acid are considered as important degradation factors. Various methods contributing to understand failure modes related to water vapor and acetic acid ingress are presented here. • Using 2D finite-element analysis in correlation with climatic data, a model is built to simulate water ingress within the module. A comparison between various climatic regions is given. • Real interfacial adhesion of encapsulant to glass is characterized before and after exposure to water vapor using a new compressive shear test.
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Valentin Chapuis, Valentin Chapuis, Federico Galliano, Federico Galliano, Christian Schlumpf, Christian Schlumpf, Heng-Yu Li, Heng-Yu Li, Christophe Ballif, Christophe Ballif, Laure-Emmanuelle Perret-Aebi, Laure-Emmanuelle Perret-Aebi, "Methods to evaluate the effect of water ingress: towards ultra-reliable PV modules", Proc. SPIE 8825, Reliability of Photovoltaic Cells, Modules, Components, and Systems VI, 88250E (24 September 2013); doi: 10.1117/12.2028918; https://doi.org/10.1117/12.2028918

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