This paper deals with comparison between visual inspection and inspection by the thermovision camera. The focus of measurement was to compare the results of visual inspection and the results of thermovision inspection like tool to detect the snail trail phenomenon on photovoltaic modules. Snail trails on photovoltaic modules are a source of enormous concern to the photovoltaic industry as no scientific reports on the mechanisms producing this global phenomenon were previously available. The measured was taken from two-year old installation of PV field. PV field is located in Northern Moravia. The results helps show limitation of automatic detection of nail trail phenomenon on photovoltaic modules by the thermovision camera.
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Strnadel et al. (2013) studied this question.