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Solar modules deployed in France in 1992 still provide 75.9% of original output power
(www.pv-magazine.com)
this post was submitted on 07 Jun 2024
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I'm getting some new panels installed this year, and I think they're suggesting they'll be at 80% after 25 years.
It looks like there is disagreement between the title and content of the article. Title says 75.9, content says 79.5
Either way, does this suggest that new panels might do better than expected over a 30 year timespan?
Newer panels are generally much more efficient and produce more electricity compared to old panels.
The 80% after 25 years might be their warranty, my panels have a similar warranty on them. If they start producing less than 80% of their original output before 25 years, the manufacturer will replace them (or something like that).
Yes, I'm looking at the paperwork and I'm realizing that you're right, 80% at 25 is the warranty guarantee, so I'm guessing they're confident it'll typically be much better than 80 at 25
Or that they were expecting to be out of business by then...
The warranty is provided by the manufacturer of the solar panels, not by the installer. If your installer goes out of business, you can claim the warranty via another installer.
Of course, it's possible the manufacturer will go out of business or sell their business.
yeh, thats what I mean, who knows what the state of the market will be in 25 years, unless its an insurance backed guarantee, be very suspicious of it.
For what it's worth, a lot of the major manufacturers (QCell, REC, Canadian Solar) have been in business since the late 90s or early 2000s. SunPower (now Maxeon) has been around since 1985.