Field experience: The use of spectrometry for soiling analysis on PV

Soiling or dust accumulation on photovoltaic solar modules deters the transmission of irradiance through the glass surface covering of the modules. Spectrometry is suggested as a manner to determine the true change in transmission as a result of the accumulation of dust. This study in form of a field experience shows how spectrometry could be used to collect detailed data in the field regarding the environment and its effect on the modules. This study also suggest how spectrometers should be applied in field experiences to ensure accurate and meaningful measurements. It was found that the clean glass module covering induced irradiance transmission losses approximately 7% in the spectral band 620-920 nm. Minimal, barely visible soiling, characterized as a dust-water solution caused an additional 2% loss over solar noon in the spectral band 320-920 nm.

Soil Analysis on PV

Authors: Carmen Lewis | Johannes M Strauss | Josefine Krogh Selj | Mari Benedikte Øgaard

Keywords: Spectrometry, PV, soiling, spectral response, solar, field experience

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