this post was submitted on 04 Jun 2026
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๐Ÿ—’ "The authors found annual degradation rates of 0.52โ€“0.61%, roughly half the average reported in prior studies, which also had limitations of smaller sample sizes (the largest other survey of this kind was with 4,200 installations) and shorter study durations averaging between 2 and 7 years."

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The degredation also really doesn't matter in the grand scheme of things. Its not like you have to throw the panel away when it loses efficiency and we aren't talking about them being half as efficient in 5 years anyways. Modern charge/balance controllers and micro inverters handle voltage differences easily.