Method And Device For Characterizing A Photovoltaic Module

A method for characterizing a photovoltaic module, by means of a device for characterizing a photovoltaic module, the characterizing device comprising a light source so as to illuminate an object, a spectrometer comprising an optical acquisition axis and a polarizing filter comprising a polarization axis and arranged in front of the spectrometer, the light reflected by the object passing through the polarizing filter to be subsequently captured by the spectrometer, and a processing unit, the device comprising

• a first configuration in which the optical axis of the polarizing filter forms a zero angle with the optical axis of the spectrometer,
• a second configuration in which the optical axis of the polarizing filter is perpendicular to the optical axis of the spectrometer,
• the method comprising the following steps implemented by the processing unit:
• a) acquiring, in the first configuration and in the second configuration respectively, an intensity reflected by a photovoltaic module illuminated by the light source and measured by the spectrometer;
• b) acquiring, in the first configuration and in the second configuration respectively, an intensity reflected by a reference reflector and measured by the spectrometer;
• c) calculating by means of a relationship between the intensities acquired in each configuration of a specular part of the intensity diffused by the photovoltaic module (M) and a specular part of the intensity diffused by the reference reflector;
• d) calculating using a relationship between the specular part of the intensity diffused by the photovoltaic module, the specular part of the intensity diffused by the reference reflector, and a reference spectral reflectivity of the reference reflector of a spectral reflectivity of the photovoltaic module, the spectral reflectivity of the photovoltaic module being characteristic of a wear state of the photovoltaic module.