From the research that I’ve gathered, it seems that on average, most solar panels have a 25 year limited warranty on power input. However, some manufacturers claim that solar panels can last anywhere from 40 to 80 years. Regardless, there are parts of the solar panel that will probably need to be replaced every couple of years, such as the batteries.
They last between 20-30 years. It depends on how well they are maintained, but 30 years is about the average. The better the solar panel, the longer it will last. But most manufacturers are comfortable saying that they will last about 30 years.
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