I believe this is saying that after the initial LID (Light Induced
Degradation), it will be rated at no less than 97% of STC. AFAIK, LID is
easily a percent or two on most modules. These modules will have been
tested to produce at least their rated output when they leave the
factory, before they see sunlight.
-------- Original Message --------
Subject: Re: [RE-wrenches] SolarWorld 245
From: Kent Osterberg <k...@coveoregon.com>
To: RE-wrenches <re-wrenches@lists.re-wrenches.org>
Date: 2010/10/13 15:22
Marco,
There was a time in the near past when +/- 10% meant that every module
shipped was at least -5%. Things have improved.
The copy of the SW 245 spec sheet that I just downloaded has a red note
explaining that every module is above nominal in their flash test. The
+/- 3 tolerance may be largely uncertainty in the accuracy of the flash
test equipment, procedures, and in how the flash test correlates to the
real world. In other words it is a CYA operation.
Kent Osterberg
Blue Mountain Solar
Marco Mangelsdorf wrote:
SolarWorld is pushing hard its 245-watt module with the claim that it
has won the Photon mag module competition in 2008 and 2009 (compared
to several other manufacturers).
I can send the spec sheet to anyone who wants it. It states on the
front page: SolarWorld only delivers modules that have */greater than
or equal to the nameplate rated power/*. (emphasis added)
This implies clearly to me a minus zero percent power tolerance.
And then you look at the finer print on page 2 and see under *Power
Tolerance : +/- 3%**
*Only modules with flash-tested > or = Pmax are delivered. Linear
warranty guarantees Year 1 module output to > or + 97% or Pmax.
I’m confused. Does this mod actually have a -0 PT or not?
And on another note, are many of you finding it difficult to get an
adequate supply of PV mods to meet your demands these days?
SolarWorld, Schott, Sharp and Kyocera seem to be in short supply these
days out in these here parts.
Thanks,
marco
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