[RE-wrenches] Defective modules

[Carl Emerson]

I found this summary from NERL, released 2011

 

Reported degradation rates in the literature appear to show a significant
improvement for thin-film technologies 

during the past decade mirroring findings of our own study encompassing more
than 40 modules. A Shell Solar CIGS 

1.12 kW system fielded at NREL provides a clear example of stable operation.
No significant performance decline 

has been found for the array after 5 years of outdoor exposure using several
different performance metrics. 

Indoor measurements taken before and after field exposure confirm the
stability of the system with the 

exception of one module that showed ~5% decline, possibly caused by a defect
introduced during the 

manufacturing process.

 

Carl E.

 

OK any good data from outdoor tests showing energy produced by thin film
compared to crystalline in the same conditions would be most helpful.

 

Can anyone confirm that NERL tested Unisolar for long term degradation and
the results were not published.  is this a myth?

 

Carl E.

 

HI  Carl,

 

I can't seem to be able to get that data off the site.

 

Maybe someone else can.

 

It is a main reason I bought the subscription,  just to support their great
testing work.

 

jay

 

 

 

 

On Jun 2, 2013, at 8:30 PM, Carl Emerson wrote:

 

Hi Jay,

 

Thanks for that, yes, I have seen the setup you refer to and it is very
comprehensive, but I thought that your reference to the 151 modules was a
lab test at STC and not an outdoor test for energy yield.

 

Can you send the link to the outdoor test results please.

 

Many Thanks,


Carl Emerson

 

Hi Carl,

 

Here is the link to how Photon measures each module.

 

http://www.photon.info/photon_lab_modul_ertragsm_en.photon?ActiveID=1289

 

and

 

http://www.photon.info/photon_lab_modul_ertragsmAD_en.photon?ActiveID=4382

 

Can you please tell me how they are doing it wrong, and what the test would
look like in doing it right?

 

Many thanks,

 

jay

 

peltz power

 

 

On Jun 2, 2013, at 3:27 PM, Carl Emerson wrote:





Jay,

 

The short answer is no.

 

These are not real world tests of energy yield under 'normal' outdoor
conditions.

 

Photon are setting up field tests for 2013 in Germany and the middle East.

 

Then they will have some useful data.

 

Carl E.

 

Hi Carl

 

Would like to see real data. 

 

Photon publishes their module data, and thin film are no where near the top
of the list. 

 

Nexpower. #14

First solar. #131

Total of 151 modules in the test. 

 

Jay

 

Peltz power


Sent from my iPad


On Jun 1, 2013, at 6:20 PM, "Carl Emerson" <Carl at solarking.net.nz> wrote:

 

 

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