90% of a solar panel is recyclable. However, it's only necessary to do so once the panel is no longer economically viable, and panels are generally warrantied t

90% of a solar panel is recyclable. However, it's only necessary to do so once the panel is no longer economically viable, and panels are generally warrantied to produce 80%+ of their nameplate capacity after 20+ years. In the EU and elsewhere there's a healthy market in used panels; when a large scale installation upgrades to newer/better panels, the used panels go on the market and end up in places where people don't care about the efficiency per area.