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<DIV>Reading on Page 13 of the Radian Operator's manual;<FONT size=2><FONT
size=2>
<P align=left>"If the battery charger is not active, the target voltage used by
the Radian inverter is </FONT></FONT><B><I><FONT size=2><FONT size=2>Sell
Voltage </B></I></FONT></FONT><FONT size=2><FONT size=2>in
the</P></FONT></FONT><B><I><FONT size=2><FONT size=2>
<P align=left>Grid-Tie Sell </B></I></FONT></FONT><FONT size=2><FONT
size=2>menu. (See page 21 for more information on charging and selling. See the
</FONT></FONT><I><FONT size=2><FONT size=2>MATE3 Owners</P>
<P>Manual </I></FONT></FONT><FONT size=2><FONT size=2>to change any of these
settings.)"</FONT></FONT></P>
<P>This scenario sounds very similar to the logic used by the old Trace
4024/4048 to GT. It was completely irrelevant which CC was used with the
4024 as "selling" was based on the inverter's DC voltage sensing. Am I
missing something? Quite frankly, I'm banking on a solution like this as I
have just installed a Radian as my own upgrade here at my shop and am using
a Classic 150 as CC. </P>
<P>Bill</P>
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border=0></P></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=solarworks@gmail.com href="mailto:solarworks@gmail.com">Kirpal
Khalsa</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=Allan@positiveenergysolar.com
href="mailto:Allan@positiveenergysolar.com">Allan@positiveenergysolar.com</A>
; <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> Sunday, December 16, 2012 10:51
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [RE-wrenches] Radian design
limitation - am I missing something?</DIV>
<DIV><BR></DIV>Allan...indeed this is a limitation....and yes i agree with you
that a higher voltage charge controller would be a welcome update to Outbacks
line up.....Looking at the DPW top of pole list, i would suggest to you a
design using 15 255 watt modules with the FM80 charge controller which would
both meet your total wattage requirements, would still only need one
charge controller, as well as conform to the 3 module multiplication
requirement....additionally it would require less foundation/excavation work,
but would in fact be a honker of an array....just an idea! Locally in your
area I know Focused Energy has a good price and availability of the US made
SolarWorld 255's which we use often...
<DIV>Good luck.</DIV>
<DIV>Kirpal<BR><BR>
<DIV class=gmail_quote>On Sun, Dec 16, 2012 at 10:41 AM, Allan Sindelar <SPAN
dir=ltr><<A href="mailto:allan@positiveenergysolar.com"
target=_blank>allan@positiveenergysolar.com</A>></SPAN> wrote:<BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<DIV bgcolor="#FFFFFF" text="#000000">Wrenches,<BR>Please tell me if I'm
overlooking something, in what appears to be a design weakness:<BR><BR>I
would like to use an Outback Radian system for a standard GTBB system. In
order to take full advantage of the system's capabilities, I have to use all
of Outback's main components; in this case the FM60 or FM80 charge
controller. The problem is that the most common (and lower-cost) modules
today are 60-cell, meaning 20 Vnominal. Given the 150V DC hard maximum
voltage limit of the FM-series charge controller, in our cold climate I can
only use these 20V modules in 60 Vnominal series strings; that is, in
multiples of three modules. As the Radian is (wisely) offered in 48V only,
pairs of modules would provide too low a voltage, and series strings of four
modules would exceed 150 Voc in cold weather. <BR><BR>The base Midnite
Classic 150 will safely operate to 198 VDC in this application, but it won't
communicate with the Mate3.<BR><BR>Is this a fundamental design limitation
in the Radian system, suggesting that Outback is due for a controller
upgrade, or am I missing something obvious? It appears that arrays and racks
have to be sized in ~720-watt sets of three-module series strings, which can
be problematic in some designs. In the design in question I would like to
use 16 240W modules on two 8-module pole-top racks (for seasonal
adjustability); nothing in sets of three meets the customer's output and
aesthetic needs. <BR><BR>Any solutions would be welcome.<BR>Thank
you,<BR>Allan<SPAN class=HOEnZb><FONT color=#888888><BR>
<DIV>-- <BR><FONT face="Times New Roman, Times, serif"><B>Allan
Sindelar</B></FONT><BR><SMALL><A href="mailto:Allan@positiveenergysolar.com"
target=_blank><FONT face="Times New Roman, Times, serif"
color=#000099><U>Allan@positiveenergysolar.com</U></FONT></A></SMALL><FONT
face="Times New Roman, Times, serif"><BR><SPAN
style="FONT-SIZE: 10pt">NABCEP Certified Photovoltaic Installer<BR>NABCEP
Certified Technical Sales Professional<BR>New Mexico EE98J Journeyman
Electrician<BR>Founder and Chief Technology Officer<BR><B>Positive Energy,
Inc.</B><BR>3209 Richards Lane (note new address)<BR>Santa Fe, New Mexico
87507<BR><B><A href="tel:505%20424-1112" target=_blank
value="+15054241112">505 424-1112</A></B><BR><A
href="http://www.positiveenergysolar.com/"
target=_blank><U>www.positiveenergysolar.com</U></A><U></U><U></U></SPAN></FONT>
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face="Times New Roman, Times, serif"><U></U><U></U><U></U><U></U><U></U><U></U><U></U><U></U></FONT><B><BR></B></SPAN></P><SPAN
style="FONT-SIZE: 10pt"><BR></SPAN></DIV></FONT></SPAN></DIV><BR>_______________________________________________<BR>List
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