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A comment on Solar is dirt-cheap and about to get even more powerful. Parent comment

Re:Solar is dirt-cheap and about to get even more powerful by TedDoesntTalk on Sunday July 11, 2021 @12:10AM (#27798410)
I thought panels had a 20 or 25 year life span with reduced wattage each year. Is that true? How old are the panels you bought?
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Re:Solar is dirt-cheap and about to get even more powerful by jeffbee on Sunday July 11, 2021 @12:18AM (#27798439)
Modern panels lose less than ½% per year. If you bought 20-year-old panels today you should expect to get 90% of their nameplate capacity still.

https://www.nrel.gov/docs/fy12osti/51664.pdf

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Re:Solar is dirt-cheap and about to get even more powerful by bserge on Sunday July 11, 2021 @01:15AM (#27798621)
25 years until they drop below 80% efficiency afaik (newer ones are even better).

But 80% is still rather decent for home use especially if you have space for more of them. Buy dirt cheap, use for another 10-20 years.

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