Researchers at the American Institute of Physics have used the clear-sky irradiance model developed by the National Renewable Energy Laboratory to measure the degradation rates of solar panels at a testing field in Germany over five years. The scientists say the model, when combined with real-world data, offers an efficient tool to evaluate the aging of PV technology.
The exercise, conducted on Longi PERC bifacial modules by Germany’s TÜV SÜD at a test field in China, showed surprisingly higher gains in panels getting light reflection from painted-surface and grassland albedo. It also showed, Longi claimed, bifacial panels operate at lower temperatures than single-sided alternatives.
At the facility, the German scientists will test devices for power electronics and grid technologies in the multi-megawatt range.
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