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Do they maintain efficiency?



Yeah! The Sunpower T5s mentioned above are still performing at near-max performance as far as I can tell. Things like shading or dust will influence modern panels way more than their age at this point IMO. Past 20 years I don't know - but for the next 10 years, it's seems to be a pretty good hack :)


Why were they decommissioned if they're still at near-max performance?


I suppose the same reason companies get rid of perfectly serviceable laptops and servers: depreciation and chasing after fractionally larger efficiencies.


Ya re-upping gov/state incentives is the theory I’ve heard in a few places. See e-bikes/EVs/general combustion leases where the same happens. Luckily, same as housing and transportation it dumps a bunch of lightly used but performant gear into the market for people like me.


Because capitalism is a helluva drug.




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