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<DIV><FONT face=Arial size=2>I believe the issue we had has to do with using the
Sanyo high voltage PV module. As Kent points out, we were operating the
controller at the design limit. I don't believe it is suited to do
that as we have other Morningstar MPPT controllers working fine for several
years now with lower voltage PV modules. BTW, the MPPT failures were in systems
that we designed and installed using the Sanyo's.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The main reason we started using this controller is
for 12 volt systems with a single high voltage module. We use other controllers
when the Voc is less than 40 volts. Warren, are any of the 200
units you sold last year used with a 200 watt Sanyo other high voltage PV
module(s)? </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Larry</FONT></DIV>
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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=warren@wind-sun.com href="mailto:warren@wind-sun.com">Warren
Lauzon</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, January 24, 2011 11:05
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [RE-wrenches] 10A Charge /
load controller</DIV>
<DIV><BR></DIV>
<DIV dir=ltr>
<DIV style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 'Calibri'">
<DIV>All controllers have failures – most commonly due to user/installer
errors. Of all the controllers we sell, Morningstar have been by far the most
trouble free and has the best no-hassle warranty.</DIV>
<DIV> </DIV>
<DIV>We have probably sold/installed around 100 to 200 of the SS-MPPT-15
controllers over the past year or so, and have seen almost zero problems that
were not caused by a bad installation of some sort. Just on a side note, of
all the controllers of all brands we have sold over the past decade, probably
3/4 of those returned by end users as “not working” has nothing wrong with
them.</DIV>
<DIV> </DIV>
<DIV
style="DISPLAY: inline; FONT-WEIGHT: normal; FONT-SIZE: small; COLOR: #000000; FONT-STYLE: normal; FONT-FAMILY: 'Calibri'; TEXT-DECORATION: none">
<DIV style="FONT: 10pt tahoma">
<DIV> </DIV>
<DIV style="BACKGROUND: #f5f5f5">
<DIV style="font-color: black"><B>From:</B> <A title=kent@coveoregon.com
href="mailto:kent@coveoregon.com">Kent Osterberg</A> </DIV>
<DIV><B>Sent:</B> Monday, January 24, 2011 10:39 AM</DIV>
<DIV><B>To:</B> <A title=re-wrenches@lists.re-wrenches.org
href="mailto:re-wrenches@lists.re-wrenches.org">RE-wrenches</A> </DIV>
<DIV><B>Subject:</B> Re: [RE-wrenches] 10A Charge / load
controller</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV
style="DISPLAY: inline; FONT-WEIGHT: normal; FONT-SIZE: small; COLOR: #000000; FONT-STYLE: normal; FONT-FAMILY: 'Calibri'; TEXT-DECORATION: none">The
spec sheet for the SS-MPPT says 75 volts maximum open circuit. Maximum
PV power: 200 watts for 12-volt batteries and 400-watts for 24-volt
batteries. While it is supposed to be protected from PV overload and PV
high voltage, it doesn't seem surprising that failures that have been observed
are in systems that are pushing on these limits. Fortunately,
Morningstar stands behind their product.<BR><BR>Kent Osterberg<BR>Blue
Mountain Solar, Inc.<BR></DIV></DIV></DIV></BLOCKQUOTE></BODY></HTML>