It is known that the problems and failures that monocrystalline and polycrystalline PV modules often exhibit are due to various factors, both on the manufacturing side and operation/use side.
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Conditions for proper thermography of PV modules
Manufacturers of thermal imaging cameras, e.g. FLIR, note that PV module thermography can be performed when the incident radiation on the surface of the Pv modules is at least 500 Watt/m2, and preferably above 700 Watt/m2.
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