Hi,
IMHO the "window" (and panel levelling) is nothing to do with the "steps" which I believe is your fundamental issue? Except perhaps indirectly, that heating / thermal expansion is causing some type of "mechanical" problem such as a bad electrical contact (or an "intermittent" electrical component).
Beware that glass (and some "clear" plastics) is NOT "transparent" to UVB rays, which are supposed to be measured by the "UV Index". Empirical "Evidence" of this is that lorry drivers are said to tan on only one side of their face (the one beside an open window).
However, as I've said before, I don't believe that particular UV sensor actually measures the UV Index "correctly", so it still may give a similar output (as does the FO sensor). At the moment your "UV" sensor seems to be correlating much better with the Visible light than is the Visible/IR sensor!
You haven't commented that your solar graphs are "skewed" sideways relative to the Cumulus "Maximum Solar Rad" curve (which could indeed be caused by a tilted panel). But I presume you understand the other reasons why this can a happen, and that it will actually change during the year?
Cheers, Alan.
IMHO the "window" (and panel levelling) is nothing to do with the "steps" which I believe is your fundamental issue? Except perhaps indirectly, that heating / thermal expansion is causing some type of "mechanical" problem such as a bad electrical contact (or an "intermittent" electrical component).
Beware that glass (and some "clear" plastics) is NOT "transparent" to UVB rays, which are supposed to be measured by the "UV Index". Empirical "Evidence" of this is that lorry drivers are said to tan on only one side of their face (the one beside an open window).
However, as I've said before, I don't believe that particular UV sensor actually measures the UV Index "correctly", so it still may give a similar output (as does the FO sensor). At the moment your "UV" sensor seems to be correlating much better with the Visible light than is the Visible/IR sensor!
You haven't commented that your solar graphs are "skewed" sideways relative to the Cumulus "Maximum Solar Rad" curve (which could indeed be caused by a tilted panel). But I presume you understand the other reasons why this can a happen, and that it will actually change during the year?
Cheers, Alan.