Even 25-30 years is starting to look pessimistic. https://www.greenbuildingadvisor.com/article/testing-a-thirty-year-old-photovoltaic-module https://www.greenb

Even 25-30 years is starting to look pessimistic. https://www.greenbuildingadvisor.com/article/testing-a-thirty-year-old-photovoltaic-module https://www.greenbuildingadvisor.com/article/testing-a-thirt... https://global.kyocera.com/news-archive/2009/0805_jeao.html https://global.kyocera.com/news-archive/2009/0805_jeao.html My feeling is that most significant degradation comes from problems with assembly weather sealing, connectors, and/or electronic components. The cells themselves should last for a long time with modest degradation. Inverters on the other hand seem to be closer to consumables in PV installs, but even those should last 10-20 years depending on the model, and refurbishment is possible.