Even 20 years is much below what most studies show. Panels tend to keep functioning well beyond 30 years, with degradation at 86%. It might be true that economi

Even 20 years is much below what most studies show. Panels tend to keep functioning well beyond 30 years, with degradation at 86%. It might be true that economically in 30 years they're so much cheaper that it's worth replacing them with new panels, but that's an optimisation, not a question of replacement need. Inverters a different story.