New testing conducted at France's oldest PV system have shown that its solar modules can still provide performance values in line with what the manufacturers promised.
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.
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 you sound like a rad dude ad I’d love to have a beer with you
Hah, thanks (if you’re serious)! Feel free to DM me if you’re ever in the San Francisco Bay Area.