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<DIV><FONT face=Arial size=2>Hi Jay,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>My experience was the exact opposite
with Unisolar triple-junction structural standing seam systems in 1996
and megawatts of Unisolar from 2003 to 2007. My Unisolar tests and
installations exceeded PVWATTS kWh estimates by approx 5%
(PVWATTS uses crystalline PV temperature coefficient). PVWATTS is a
reliable estimator for crystalline PV systems when 0.65 dc-to-ac derate factor
for battery based systems and 0.75 to 0.82 for batteryless systems was used.
</FONT><FONT face=Arial size=2>See <A
href="http://www.uni-solar.com/uploadedFiles/0.4.2_white_paper_3.pdf">http://www.uni-solar.com/uploadedFiles/0.4.2_white_paper_3.pdf</A></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>a-Si degradation is no mystery. See <A
href="http://www.nrel.gov/docs/fy00osti/28333.pdf">http://www.nrel.gov/docs/fy00osti/28333.pdf</A> NREL
on-going tests since 1997 validates Unisolar's 20-year 80% warranty claim.
It is interesting that the time of year Unisolar is deployed affects its light
induced degradation. See "Recovery of Light Induced Degradation in Amorphous
Silicon Solar Cells and Modules."</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I think that Unisolar modules
are suitable:</FONT></DIV>
<DIV><FONT face=Arial size=2>when high power density is not
required</FONT></DIV>
<DIV><FONT face=Arial size=2>if flexibility and/or </FONT><FONT face=Arial
size=2>conformability are wanted</FONT></DIV>
<DIV><FONT face=Arial size=2>if partial shading is an issue</FONT></DIV>
<DIV><FONT face=Arial size=2>if high cell temperature is an issue</FONT></DIV>
<DIV><FONT face=Arial size=2>if building integration is wanted</FONT></DIV>
<DIV><FONT face=Arial size=2>if no glass is wanted</FONT></DIV>
<DIV><FONT face=Arial size=2>if its unique appearance is wanted.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The "aluminum-frame-glass-module" monopoly has been
broken. Unisolar's persistence, First Solar's CdTe success, and the
re-appearance of CIGS (remember Arco/Siemens 1998 ST modules?) along with "see
through" and other flexible PV modules is changing PV. The lowest price per
watt (initial cost) is gradually giving way to lowest price per kilowatt-hour
(lifecycle cost). It's still a neck-n-neck which PV technology will
win, but there is no doubt that PV is winning almost everyone's heart and
mind.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>
<DIV><FONT face=Arial size=2>Best regards,</FONT></DIV>
<DIV><FONT face=Arial size=2>Joel Davidson</FONT></DIV>"Not all change is for
the better, but nothing gets better without change." So v<FONT face=Arial
size=2>ote for change!</FONT></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=jay@asis.com href="mailto:jay@asis.com">jay peltz</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=re-wrenches@lists.re-wrenches.org
href="mailto:re-wrenches@lists.re-wrenches.org">RE-wrenches</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, October 31, 2008 10:23
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [RE-wrenches] crystalline VS
uni-solar</DIV>
<DIV><BR></DIV>Hi Joel,
<DIV><BR></DIV>
<DIV>1. unisolar 64's and sharp single cystal</DIV>
<DIV><BR></DIV>
<DIV>2. SMA inverters</DIV>
<DIV><BR></DIV>
<DIV>3. Arcata California</DIV>
<DIV><BR></DIV>
<DIV>4. exact, I mean side by side with no shading, same azimuth ( south) same
tilt ( can't remember)</DIV>
<DIV><BR></DIV>
<DIV>5. As to the unisolar producing more, I must stress that I have
never seen the Unisolar produce more than SC, never.</DIV>
<DIV><BR></DIV>
<DIV>jay</DIV>
<DIV><BR></DIV>
<DIV>peltz power</DIV>
<DIV>
<DIV>
<DIV>On Oct 31, 2008, at 1:01 PM, Joel Davidson wrote:</DIV><BR
class=Apple-interchange-newline>
<BLOCKQUOTE type="cite"><SPAN class=Apple-style-span
style="WORD-SPACING: 0px; FONT: 12px Helvetica; TEXT-TRANSFORM: none; COLOR: rgb(0,0,0); TEXT-INDENT: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BORDER-COLLAPSE: separate; orphans: 2; widows: 2; webkit-border-horizontal-spacing: 0px; webkit-border-vertical-spacing: 0px; webkit-text-decorations-in-effect: none; webkit-text-size-adjust: auto; webkit-text-stroke-width: 0">
<DIV>
<DIV
style="FONT-SIZE: 12pt; MARGIN: 0px; FONT-FAMILY: 'times new roman', 'new york', times, serif">
<P>Hello Jay,</P>
<DIV><BR class=webkit-block-placeholder> </DIV>
<P>Sounds like something is wrong other than Unisolar vs. crystalline. All
things being equal, the Unisolar should produce more kWh per kW than
crystalline. Questions:</P>
<P>1. What modules and how many of each?</P>
<P>2. What inverter or inverters?</P>
<P>3. Geographic location?</P>
<P>4. Array azimuth and tilt?</P>
<DIV><BR class=webkit-block-placeholder> </DIV>
<P>Best regards,</P>
<P>Joel Davidson</P>
<DIV style="MARGIN: 0px"><BR></DIV>
<DIV
style="FONT-SIZE: 12pt; MARGIN: 0px; FONT-FAMILY: 'times new roman', 'new york', times, serif"><BR>
<DIV
style="FONT-SIZE: 12pt; MARGIN: 0px; FONT-FAMILY: 'times new roman', 'new york', times, serif">-----
Original Message ----<BR>From: jay peltz <<A
href="mailto:jay@asis.com">jay@asis.com</A>><BR>To: RE-wrenches <<A
href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</A>><BR>Sent:
Friday, October 31, 2008 8:27:19 AM<BR>Subject: Re: [RE-wrenches]
crystalline VS uni-solar<BR><BR>Hi Geoff,
<DIV style="MARGIN: 0px"><BR></DIV>
<DIV style="MARGIN: 0px">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 style="MARGIN: 0px"><BR></DIV>
<DIV style="MARGIN: 0px">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 style="MARGIN: 0px"><BR></DIV>
<DIV style="MARGIN: 0px">jay</DIV>
<DIV style="MARGIN: 0px"><BR></DIV>
<DIV style="MARGIN: 0px">peltz power</DIV>
<DIV style="MARGIN: 0px"><BR></DIV>
<DIV style="MARGIN: 0px"><BR>
<DIV style="MARGIN: 0px">
<DIV style="MARGIN: 0px">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="WORD-SPACING: 0px; FONT: 12px Helvetica; TEXT-TRANSFORM: none; COLOR: rgb(0,0,0); TEXT-INDENT: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BORDER-COLLAPSE: separate; orphans: 2; widows: 2">
<DIV
style="FONT-SIZE: 12pt; MARGIN: 0px; COLOR: rgb(0,0,0); FONT-FAMILY: 'Times New Roman'">
<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 style="MARGIN: 0px">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/" target=_blank
rel=nofollow>www.Third-Sun.com</A><BR><BR><EM><FONT size=4>Clean Energy -
Expertly
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