UV Light Degrades N-Type Solar Modules, Industry Standards Lacking
Researchers have discovered that ultraviolet light-induced degradation (UVID) significantly impacts the performance of n-type solar modules. This is particularly concerning as current industry standards may not accurately assess long-term power losses due to UVID.
A study published in 'Progress in Photovoltaics', titled 'UV + Damp Heat Induced Power Losses in Fielded Utility N-Type Si PV Modules', revealed that UVID can cause substantial damage to n-type modules. Moisture loading after UV exposure significantly increased series resistance in affected cells, leading to a loss of about 2.4% of their rated power per year.
SEG Solar's n-type modules, including their Yukon N series, were used in the investigation. These modules feature advanced N-Type TOPCon monocrystalline technology, known for high efficiency and minimal light-induced degradation. However, even these advanced modules were not immune to UVID's effects. A higher UV exposure (67.5 kWh/m²) than the IEC 61215-2 standard (15 kWh/m²) was needed to see measurable performance loss. UVID can cause recombination losses at the cell surface and lack of zinc in metallization paste, further contributing to power loss.
The findings highlight the need for revised industry standards to better assess long-term UVID losses. Manufacturers like SEG Solar should consider these findings in their product development to mitigate UVID's impact on module performance. Further research is crucial to understand and address UVID's effects on solar module performance.
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