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Hi Jay,<br>
<br>
>From my own Unisolar installations, and many comments from installers
all over the US, I have to say that the system on the North coast is
some kind of an anomaly if it isn't performing at least as well as a
crystalline system of = power rating at the same or similar site with
the same or similar degree of pitch. One possible answer could be
related to the height of the standing seams at this installation, since
the higher the seam, the greater the losses from shading (assuming that
the array is oriented South). I have had good results from a shallow
pitched East/West roof (!) with US modules because of the reduced
morning and evening shading from the seams, and maybe not such great
output from Southerly oriented arrays with a high standing seam roof.<br>
<br>
However, it is absolutely the case that Unisolar modules will still
produce energy while partly shaded, and this applies to entire strings
as well. Because of this, they are a great choice for locations that
might experience transient shading from utility poles, chimneys, trees,
etc.<br>
<br>
Matt T<br>
<br>
jay peltz wrote:
<blockquote cite="mid3B1D1506-FABD-4D9A-8487-51AD34F8900F@asis.com"
type="cite">Hi Geoff,
<div><br>
</div>
<div>In regards to the performance between Unisolar and crystalline,
there is a side by side ( same watts, batteryless intertie with
metering) installation up here on the North coast of California, and
the the Unisolar is the constant under-performer. This includes
cloudy, sunny, warm, cold weather.</div>
<div><br>
</div>
<div>I have seen nothing in the field to support the Unisolar claims
about better performance in low light etc. That said, they do work
better in very hot conditions, if thats what you have.</div>
<div><br>
</div>
<div>jay</div>
<div><br>
</div>
<div>peltz power</div>
<div><br>
</div>
<div><br>
<div>
<div>On Oct 31, 2008, at 8:08 AM, Geoff Greenfield wrote:</div>
<br class="Apple-interchange-newline">
<blockquote type="cite"><span class="Apple-style-span"
style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px;">
<div
style="font-family: 'Times New Roman'; font-size: 12pt; color: rgb(0, 0, 0);">
<div style="margin: 0px;">As a follow up to my uni-solar post (and
thanks to all who provided feedback), I have a second request:</div>
<p style="margin: 0px;"> </p>
<div style="margin: 0px;">Any references to recent side-by side
"shoot-outs" between Unisolar and conventional crystaline PV?
Scientific studies? Your own wrench thoughts?</div>
<p style="margin: 0px;"> </p>
<div style="margin: 0px;">I am more and more often encountering
confused customers that are considering unisolar systems at zero-tilt
(we are at 40 degrees N), with plenty of partial shading, after getting
a pitch about all sorts of advantages of Uni-Solar. I think that this
product has it's role and I occasionally sell it... But I am frustrated
when I truly believe I can deliver a better net energy production with
a tilted crystalline solution (avoiding the shaded areas). <span
class="Apple-converted-space"> </span><br>
</div>
<div>For a brighter energy future,<br>
<br>
Geoff Greenfield<br>
Founder and CEO<br>
<font size="4"><strong>Third Sun Solar & Wind Power Ltd.<br>
</strong></font>340 West State Street, Unit 25<br>
Athens, OH 45701<br>
<br>
740.597.3111 Fax 740.597.1548<br>
<a href="http://www.Third-Sun.com">www.Third-Sun.com</a><br>
<br>
<em><font size="4">Clean Energy - Expertly Installed<br>
</font></em><br>
<br>
</div>
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