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<DIV><FONT size=2 face=Arial>kW and/or kWh performance warranties are what
some customers want and are willing to pay for and what some PV
companies provide successfully. Many wrenches guarantee their
systems' DC and even AC nameplate rating. </FONT><FONT size=2
face=Arial>For several years PowerLight, now owned by SunPower, entered into kWh
contracts with its customers. Their success was based on good system design,
performance modeling, installation, monitoring, and service. I observed
(not insider information) their systems performing 4% to 6% better than
PVWatts estimates. Basically, they did what all smart contractors do:
under-promise and over-deliver.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Here's the latest news about performance
guarantees. See <A
href="http://globalsolartechnology.com/index.php?option=com_content&task=view&id=5388&Itemid=9">http://globalsolartechnology.com/index.php?option=com_content&task=view&id=5388&Itemid=9</A></FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Small companies can provide the same customer
confidence without performance warranties. Give your prospective customer a list
of satisfied customers who have been monitoring their systems. Let your
customers tell your prospects that your systems deliver what you promised
(estimated). Then tell your prospect that they can save money by not buying a
performance warranty.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Joel Davidson</FONT></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=jryago@netscape.com href="mailto:jryago@netscape.com">Jeff Yago</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> Monday, April 26, 2010 7:02
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [RE-wrenches] Volcanos,
reduced solar production and kWh performance warranties</DIV>
<DIV><BR></DIV>
<DIV style="FONT-FAMILY: Arial, sans-serif; FONT-SIZE: 10pt">
<DIV>I would never contract for a guarantee minimum performance for a very
simple reason - weather!</DIV>
<DIV> </DIV>
<DIV>I think the only reasonable guarantee is to state the "nameplate" output
of the array provided under test conditions, and make it clear that air
temperature, clearness factor, dust, cloud cover, and out of tolerance utility
grid events will all reduce system performance from this perfect lab
value. Since you cannot control any of these affects on system
performance, there has to be a reasonable expectation of system performance
for you and your client. </DIV>
<DIV> </DIV>
<DIV>Why do doctors and hospitals have you sign a disclaimer before they
render service? How about accountants, mechanics, engineers,
stock brokers, and dentists, Yes, you can sue for gross negelence,
but how many will sign a statement that guarantees their work will have a
specific outcome. Odds are, the small print in the document you sign
will point out that there are too many unknowns beyond their
control that could reduce the hoped for outcome and if you want a
guarantee, - buy life insurance - you die - they pay -guaranteed.</DIV>
<DIV> </DIV>
<DIV>Jeff Yago</DIV>
<DIV> </DIV>
<DIV> </DIV><BR> <BR>
<HR>
Netscape. Just the Net You Need.</DIV>
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