I hadn't realized how the temperature of panels decreases output and to what extent.
I'm now re thinking my mounting arrangements,(currently on corrugated iron roof) I'm now thinking maybe I should build a wooden stand with room for batteries etc underneath. that way I could probably build it where it will get a bit more sun each day as well.
Even in winter when looking at roof I can see heat distortion/mirage effect so I imagine it get's pretty warm up there.
The panels don't touch roof directly but bottom end only has half inch tiber between panel and roof iron...
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