>A team based across Switzerland, Austria and Germany has now analysed the long-term performance of six photovoltaic systems **installed across Switzerland between 1987 and 1993.**
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>An analysis of six solar panel systems installed in Switzerland over 30 years ago shows they remain effective, with material quality emerging as the main factor determining their longevity.
>Panel performance **declined by just 0.24% per year** on average, about three times slower than literature values for such systems.
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>A team based across Switzerland, Austria and Germany has now analysed the long-term performance of six photovoltaic systems **installed across Switzerland between 1987 and 1993.**
____
>An analysis of six solar panel systems installed in Switzerland over 30 years ago shows they remain effective, with material quality emerging as the main factor determining their longevity.
>Panel performance **declined by just 0.24% per year** on average, about three times slower than literature values for such systems.
study link: https://pubs.rsc.org/en/content/articlelanding/2025/el/d4el00040d
Many developers want design life of structural components between 30 and 40 years