<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr">Many OEMS outsource cells, is it possible the cells came from different cell companies?</div><div dir="ltr"><br></div><div dir="ltr">Jay</div><div dir="ltr">Peltz power. </div><div dir="ltr"><br><blockquote type="cite">On Nov 5, 2021, at 7:27 PM, Bill Hoffer <sunengser@gmail.com> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">\ufeff<div dir="auto">Like any manufacturing process there are variations, especially solar cells, regardless of type ( poly vs mono). It is getting harder to the difference between poly and mono this days due to coating processes to improve efficiency. <div dir="auto"><br></div><div dir="auto">Cells can be sorted by output (watts) and or. Color matching. Most module manufacturers make sure the watts are matched otherwise a module will underperform, so generally from an output point of view there are probably little difference in wattage of each cell. Ie not measurable differences noted for color variations.</div><div dir="auto"><br></div><div dir="auto">That being said this is all based on flashing at room temps with no heating of the cell. The color variation and reflectivity of the cell surface will impact the cell temperature in real life. Is it enough to make a real performance issue, probably not. </div><div dir="auto"><br></div><div dir="auto">IMHO I have to wonder what other shortcuts a module manufacturer is taking if their cells are not color matched. It is not hard to color match and power match cells and it usually does not cost more to do so. The product looks more professional and should operate in the field at peak efficiency. All the module manufacturers I work with sort by color and power output. I am guessing the lower quality guys are not holding their suppliers to the same standard QC. However I have no data to verify that and like I said probably not a serious hit in performance.</div><div dir="auto"><br></div><div dir="auto">Bill Hoffer</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Nov 5, 2021, 3:50 PM Jason Szumlanski <<a href="mailto:jason@floridasolardesigngroup.com">jason@floridasolardesigngroup.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto">I'm looking for a succinct way to explain why panels appear to be different colors even though they are the same orientation. See attached photo for an example. <div dir="auto"><br></div><div dir="auto">Jason Szumlanski</div><div dir="auto">Florida Solar Design Group</div></div>
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