In a white paper published this week, Chinese module maker Longi Solar shares six months of data from a testing site in India that was built in cooperation with German testing institute TÜV Rheinland. The results show energy yield gains of around 20% for both bifacial mono PERC and n-type modules.
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.
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