Abstract
We examine the correlation between monthly PV system soiling rates over a multi-year period within two groups of First Solar soiling stations in separate regions of California as a function of site separation. The results demonstrate large seasonal variations in monthly soiling rates, with seasonal patterns that differ between sites. Monthly patterns at nearby sites were more highly correlated, suggesting that soiling rates can be strongly affected by local geography and weather. For the two regions studied, soiling rate pattern correlation diminished beyond a distance on the order of 50 km.
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Gostein, M., Passow, K., Deceglie, M. G., Micheli, L., & Stueve, B. (2018). Local Variability in PV Soiling Rate. In 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC (pp. 3421–3425). Institute of Electrical and Electronics Engineers Inc. https://doi.org/10.1109/PVSC.2018.8548049
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