• nailingjello@lemmy.zip
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    27 days ago

    To give you an idea, my 12-panel PV system installed in 2011 has put out 3.5 MWh per year at its peak and now produces between 3.1 and 3.3 MWh yearly, depending on the weather.

    • dan@upvote.au
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      27 days ago

      It’s hard to attribute that just to panel degradation, though. It could be differences in weather (cloudier or snowier this year) for example.

      To measure degradation, you’d need to track the peak output of each panel. Enphase microinverters let you get per-panel metrics but I’m not sure which other brands do.

      I’m pulling data from my panels into Home Assistant via Enphase’s local API (directly from the device), then into VictoriaMetrics (which is similar to Prometheus but with a more efficient file format). I’ve got per-panel production data at 5 minute granularity from when I installed them until now.

        • dan@upvote.au
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          26 days ago

          Hah, thanks (if you’re serious)! Feel free to DM me if you’re ever in the San Francisco Bay Area.