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Some interesting results: ie. High altitude BIPV suffers reduced
degradation because of minimal snow loading. (I assume because of
less flexing of the substrate?)<br>
<br>
Array degradation was often listed as twice the module degradation.
Offering a challenge to make the installation better?<br>
<br>
I left those Ivory Towers d.b.a. failure analysis to avoid sitting
at a desk but still find a fascination in their results.<br>
<br>
Thanks, Ray,<br>
<pre class="moz-signature" cols="72">Bill Loesch
Solar 1 - Saint Louis Solar
314 631 1094</pre>
<div class="moz-cite-prefix">On 03-Jun-15 11:45 PM, Ray Walters
wrote:<br>
</div>
<blockquote cite="mid:556FD7D6.80600@solarray.com" type="cite">
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<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://www.sciencedaily.com/releases/2014/02/140213122404.htm">http://www.sciencedaily.com/releases/2014/02/140213122404.htm</a><br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://www.nrel.gov/docs/fy12osti/51664.pdf">http://www.nrel.gov/docs/fy12osti/51664.pdf</a><br>
go to the conclusion on page 18.<br>
<br>
Thanks,<br>
<pre class="moz-signature" cols="72">R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760</pre>
<div class="moz-cite-prefix">On 6/1/2015 5:46 PM, jay peltz wrote:<br>
</div>
<blockquote
cite="mid:CAGr8+7fKE1Xa6p_xGk_Z+kNDByeWaww08-L9g=pA0VeMuMJUKQ@mail.gmail.com"
type="cite">
<div dir="ltr">HI Ray,
<div><br>
</div>
<div>Can you tell me/us where you have your data on the a-Si
having higher voltage degradation over time?</div>
<div><br>
</div>
<div>thanks</div>
<div>jay</div>
<div><br>
</div>
<div><br>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sun, May 31, 2015 at 11:31 AM,
Ray Walters <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:ray@solarray.com" target="_blank">ray@solarray.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> Yes, amorphous
modules degrade faster then crystalline cells. 15
years will really start catching up with you, that's
why we always tried to stick to monocrystalline when
we could. <br>
I think your best option for now is to rewire the
array for much higher voltage. Even your current
voltage problem aside, the system will run more
efficiently at higher voltage: Less current = less
voltage drop. I would probably just jump the 4 module
sets in series in the combiner box to 8 in series.
Should be a quick fix, and really show an
improvement. I've seen this same issue with low
voltage polys and undersized wiring. Usually the MPP
controllers like some room to play with; as soon as
the MPP voltage gets close to or less than battery
voltage, the current drops off substantially. <br>
<br>
<br>
<br>
<br>
<pre cols="72">R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
<a moz-do-not-send="true" href="tel:303%20505-8760" value="+13035058760" target="_blank">303 505-8760</a></pre>
</div>
</blockquote>
</div>
<br>
<div class="gmail_signature">
<div dir="ltr">
<div>
<div dir="ltr">
<div>Jay Peltz<br>
Peltz Power<br>
<a moz-do-not-send="true"
href="mailto:jay.peltz@gmail.com"
target="_blank">jay.peltz@gmail.com</a></div>
</div>
</div>
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