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Comparison of Imaging Techniques for PV Module Inspection in the Field
I. Høiaas, M. Vukovic, M. Jakovljevic, I. Burud, E. Olsen
PV Systems – Modelling, Design, Operation and Performance
Subtopic: Operation, Performance and Maintenance of PV Systems
Event: 38th European Photovoltaic Solar Energy Conference and Exhibition
Session: 5DO.2.4
ISBN: 3-936338-78-7
0,00 EUR
Document(s): presentation


To achieve an efficient fault detection and diagnosis, different imaging techniques has been proposed. Luminescence techniques, such as UV fluorescence (UVF), electroluminescence (EL) and photoluminescence (PL), can provide the needed detailed information of faults invisible to the visual and IRT inspection. Luminescence is a materials' ability to spontaneously emit electromagnetic radiation after absorbing energy in various forms. These techniques may indeed provide high-resolution spatially resolved information including cracks, series resistance effects, bypass diode failure, PID and carrier induced degradation. In this work we have compared different luminescence techniques for outdoor application. These are techniques that can aid operation and maintenance (O&M) personnel deciding the most cost-efficient mitigation measure after having identified faulty modules with IRT.