The PV module only lasts 30-35 years, some quit sooner and some last longer, but they do have an end-of-life and will need to be recycled and new ones installed if you still want them. That's one thing that's happening in areas, like California, where rooftop solar started. They've reached that end of life and few recycling facilities that can take apart the different components exist. https://www.energy.gov/eere/solar/end-life-management-solar-photovoltaics