A simple Google tells me (as I was curious) it's between 6 months to 20 years, with the average being 2 years. https://www.google.com/search?q=carbon+payback+ti

A simple Google tells me (as I was curious) it's between 6 months to 20 years, with the average being 2 years. https://www.google.com/search?q=carbon+payback+time+solar+panels+study https://www.google.com/search?q=carbon+payback+time+solar+pa... Hard to imagine a large scale rollout like this would have been on the low quality side (plus hey its Germany after all).