See, we're smart around here.... we figured out the right way to do it without even looking...
On Fri, Jun 4, 2021 at 3:07 PM Chuck McCown via AF <[email protected]> wrote: > Yep, that is how it is done. Special cabinet. I don’t recall the type of > light. I built one once based on a spec, NIST or someone. It was a big > ass light I do remember that. I think it was an arc light perhaps. You > had to do things to make sure there was uniform illumination etc. > > We were characterizing factory seconds that we got by the truck loads. > > *From:* Adam Moffett > *Sent:* Friday, June 4, 2021 1:59 PM > *To:* [email protected] > *Subject:* Re: [AFMUG] solar panels > > > Yeah, I suppose some kind of continuous load that will take whatever the > panel can put out....like a big resistor with a heat sink. > > Then meter the WH output. Do it in a dark room and have a constant light > source that's the same for each panel being tested. Mount each sample in > the same position. > > Sounds simple in theory, but I ain't got the time for that stuff. > > > On 6/4/2021 3:54 PM, Mathew Howard wrote: > > It seems like it should be relatively simple to build a test setup where > you could just shine some kind of a light on it, and measure the output > compared to a new panel... whether or not it would be worth the bother for > anybody to do that, is another matter. > > On Fri, Jun 4, 2021 at 2:42 PM Adam Moffett <[email protected]> wrote: > >> There must be a way... >> >> My Father-in-law works at a lab at Cornell where they wanted a number of >> panels with all exactly the same efficiency for a research project. Not >> sure the test method, but obviously they figured one out. >> >> >> On 6/4/2021 3:05 PM, Steve Jones wrote: >> >> How do you guage a level of used on solar panels? Age? Visual issues? Can >> you test efficiency reliably, like set up a uv light and specified distance >> in dark room and measure output? As they age what's the curve look like on >> efficiency loss? >> >> On Fri, Jun 4, 2021, 1:12 PM David Coudron <[email protected]> >> wrote: >> >>> What you see on snail roads. >>> >>> I am guessing they are smears of some kind that affect the clear top >>> layer? >>> >>> Get Outlook for iOS <https://aka.ms/o0ukef> >>> ------------------------------ >>> *From:* AF <[email protected]> on behalf of Bill Prince < >>> [email protected]> >>> *Sent:* Friday, June 4, 2021 1:09:14 PM >>> *To:* [email protected] <[email protected]> >>> *Subject:* Re: [AFMUG] solar panels >>> >>> >>> Some of the used ones list defects in the description. Saw one that said >>> "cracked", and another said "snail tracks". WTH are snail tracks? >>> >>> >>> >>> bp >>> <part15sbs{at}gmail{dot}com> >>> >>> On 6/4/2021 11:05 AM, Chuck McCown via AF wrote: >>> >>> Ah, they are used. I wonder how much used... >>> >>> *From:* Robert >>> *Sent:* Friday, June 4, 2021 11:59 AM >>> *To:* [email protected] >>> *Subject:* Re: [AFMUG] solar panels >>> >>> I haven't seen anything that will beat this. $45/panel for 224watts. >>> >>> >>> https://shop.signaturesolar.us/products/224w-60cell-silver-poly-solar-panel-by-sharp >>> >>> On 6/4/21 10:37 AM, Chuck McCown via AF wrote: >>> >>> Who has the best deals for solar panels these days? >>> >>> >>> ------------------------------ >>> -- >>> AF mailing list >>> [email protected] >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >>> -- >>> AF mailing list >>> [email protected] >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >> >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> > > ------------------------------ > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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