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UV Degradation Threatens PV Module Longevity: Industry Experts Call for Action

UV degradation in PV modules is a looming threat. Industry experts urge better testing and longer-term durability to ensure the economic viability of innovative cell types.

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1 min read
In this picture we can see an edited image of the pond water in the front. Behind we can see some...
In this picture we can see an edited image of the pond water in the front. Behind we can see some trees and sun rays.

UV Degradation Threatens PV Module Longevity: Industry Experts Call for Action

Industry experts are addressing growing concerns about ultraviolet-induced degradation in photovoltaic (PV) modules, particularly in innovative cell types like Perovskite and TOPCon. The issue, which has been gaining attention for around two and a half years, could significantly impact the economic viability of large-scale PV projects if not properly addressed.

Recent lab tests have revealed strong UV degradation in some modules, which could lead to long-term damage and efficiency loss. Two mechanisms are at play: UV-induced degradation and an additional process causing reversible power loss during dark storage. Manufacturers have been exploring solutions such as process control and additives to the encapsulant to mitigate degradation.

Industry stakeholders are calling for an update to standard testing procedures. This includes light soaking or stabilization after the UV test to better simulate real-world conditions. Thorough UV testing should also become a routine part of quality control for manufacturers and buyers to mitigate risks. However, comparing indoor and outdoor degradation remains uncertain, with indoor results affected by the dark storage effect.

While the Ivanpah Solar plant in California, which cost $2.2 billion to build, is closing operations, this does not signal industry failure. Instead, it underscores the need for manufacturers to focus on effective UV filtering and longer-term durability testing. By addressing these concerns, the industry can ensure the longevity and economic viability of PV modules, particularly in innovative cell types.

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