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Statistical Analysis of Infrared-Inspections of PV-Plants
C. Buerhop-Lutz, T. Pickel, H. Scheuerpflug, J. Hauch, C. Camus, C.J. Brabec
Performance, IR Imaging, Statistics, Failure
PV System Performance and Integration
Subtopic: Design and Operation of PV Systems
Event: 33rd European Photovoltaic Solar Energy Conference and Exhibition
Session: 6BV.1.44
2320 - 2324
ISBN: 3-936338-47-7
Paper DOI: 10.4229/EUPVSEC20172017-6BV.1.44
0,00 EUR
Document(s): paper


First statistical evaluation of IR-inspections of PV-plants reveals that 81% of the installed PV-plants show IR-abnormalities. More than 140 PV-plants with more than 200,000 PV-modules were inspected and evaluated statistically. Main IR-abnormalities or failures in modules and string installations are analyzed, respectively. The average failure rate for PV-modules is about 6% and for module strings approximately 1%. The differentiation based on the installation type reveals that small residential installations relatively seen show more defective modules than large field installations. A first estimation of the missed income by not detecting and maintaining major module and plant failures yield a missed income of about 100 Mio. EUR considering the PV-systems installed in Germany. IR-imaging is a valuable method to give fast and reliable information about the actual quality and failure rate in inspected PV-installations.