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#200941 04/28/11 10:04 PM
Joined: Apr 2002
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As the solar install titled "Bigger" is commisioned and fully operational, I came upon this point of interest.

Out of the 17,000+ total panels installed for the 4.26MW total system capacity there were only 18 rejected panels.

Sure sounds like kudos are in order for the "Made in USA" panels on this job.

The rejection reasons are 'output below spec'.



John
Joined: Jul 2007
Posts: 1,335
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How did they test the panels? Were they passed through a test station in a controlled environment?


"Live Awesome!" - Kevin Carosa
Joined: Feb 2003
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AK.,

I think they spotted by thru the sub colleter control panels which they will check the current drawage from each section so if the X number of amps is lower than other they will check it closer to make sure which panel is bad and they will find it.

Merci,
Marc


Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)

Joined: Apr 2002
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SparykinAk:
Marc hit the nail basically. The panels were tested at the mfg after assembly as you mentioned. During field testing, the 18 that were 'rejected' were discovered. IMHO, that is a small percentage.

The voltage output from the 18 was 'under performance spec'.

I am curious if anyone has any comments on other install fail/defect panels.


John
Joined: Mar 2011
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What manufacturer and model if I may ask?

We have installed about 40k Yingli 230 modules in the past 18 months and as stated previously each combiner box is checked and each string's output (Isc and Vmp) are checked and so far all have had a voltage tolerance below 2% and a current tolerance below 3%, well below the rebate threshold.

The biggest issue we've had to date is the care and handling of the modules before, during and after their installation before turning the projects over to the owner, accidents happen and modules aren't cheap.

Joined: Mar 2011
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Nevermind, I found the project online.

It's nice to see an American company producing modules in that volume AND that owners are willing to pay the higher price for them, that is hard to find.

Joined: Apr 2002
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You may find some info on this project here at this link:

http://www.facebook.com/solarnation



John
Joined: Apr 2002
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Manufacturer is 'Sun Solar'


John
Joined: Jul 2007
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That's how I do it by comparing with others of a string. There's are several manufacturers who are or were churning out panels a few years ago, Europe was buying up everything they could from the US that was not nailed down


"Live Awesome!" - Kevin Carosa
Joined: Feb 2002
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John,


Did the manufacture take the defective panels back? If not, how did they get rid of the defective panels.

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