• 21 Posts
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Joined 11 months ago
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Cake day: July 21st, 2023

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  • Those are way more interesting than this single installation with -0.66%:

    “Another more recent study carried out by the US Department of Energy’s National Renewable Energy Laboratory (NREL) on 1,700 American sites totaling 7.2 GW of power, showed a median degradation of around -0.75%/year. Moveover, another research focused on 4,300 residential installations in operation in Europe and used different data processing methodologies. Depending on the methods, a median loss of -0.36% to -0.67%/year was obtained.”

    Also the article doesn’t mention standard deviation or IQR of the drop, or what efficiency they originally had. Which is the minimum of information I would expect.