I just had a 8.4kw PV system installed in June and finally got the PTO from the utility company on July 5th. I am curious as to how much power output difference can be expected between panels. I have some that I'm guessing are good (maybe too good for all I know) and then some in the same general area that output about 10% less. The installer said that is normal but I keep thinking about the ~2% first year warranty that the panel manufacturer claims. Is 10% difference really 'normal'?
I would add more details if I knew what would be relevant.
I would add more details if I knew what would be relevant.
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