<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<div class="moz-cite-prefix">Mac,<br>
Trace made both the SWI/PAR parallel stacking and a series
stacking cable. I don't know if stacking four units in
series/parallel is possible. I never investigated it, and the
manual (Rev. 4.01) doesn't address it. I suspect that it's not
possible, from this section on page 96:<br>
<blockquote>The parallel stacking interface cable (SWI/PAR) simply
plugs into the stacking port on the left end of each<br>
inverter and allows the two inverters to operate as a single
inverter. The interface method is based on the<br>
series stacking system offered for the SW Series inverters since
their introduction for the North American<br>
market. The parallel stacking system operates the inverters in
phase by having one of the inverters<br>
operate as the MASTER and the other as a SLAVE. When an AC
source is connected, the MASTER first<br>
synchronizes to the AC source, then connects to it and battery
charges. Since the SLAVE follows the<br>
master and is set-up with a longer warm-up delay, the SLAVE
inverter is already synchronized when it<br>
transfers the loads and starts battery charging. This allows
very smooth transitions from inverter mode to<br>
charger mode.<br>
</blockquote>
I'd interpret this to mean that the SWI/PAR cable uses the only
stacking port available.<br>
<br>
But the bigger issue is this: must you change it? It doesn't
matter that one pair works hard and the other rests unless the
hardworking pair aren't up to the job. Unless you have overload
shutdowns, there's no benefit to parallel stacking, and you're
messing with obsolete legacy hardware that's not supported and for
which parts and service will be difficult to obtain (good luck
finding a pair of SWI/PAR cables...). I'd advise against changing
the system configuration if there are no problems now - it sounds
like a solution in search of a problem.<br>
<br>
Just my $.02...<br>
Allan<br>
<br>
<div class="moz-signature">
<meta http-equiv="Content-Type" content="text/html;
charset=ISO-8859-1">
<meta name="ProgId" content="Word.Document">
<meta name="Generator" content="Microsoft Word 11">
<meta name="Originator" content="Microsoft Word 11">
<link rel="File-List" href="SignatureNew_files/filelist.xml">
<o:smarttagtype
namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="address">
<o:smarttagtype
namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="PostalCode">
<o:smarttagtype
namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="State">
<o:smarttagtype
namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="City">
<o:smarttagtype
namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="Street">
<!--[if gte mso 9]><xml>
<o:DocumentProperties>
<o:Author>pe</o:Author>
<o:Template>Normal</o:Template>
<o:LastAuthor>pe</o:LastAuthor>
<o:Revision>6</o:Revision>
<o:TotalTime>2</o:TotalTime>
<o:Created>2013-06-07T19:15:00Z</o:Created>
<o:LastSaved>2013-09-23T20:34:00Z</o:LastSaved>
<o:Pages>1</o:Pages>
<o:Words>69</o:Words>
<o:Characters>394</o:Characters>
<o:Company>pe</o:Company>
<o:Lines>3</o:Lines>
<o:Paragraphs>1</o:Paragraphs>
<o:CharactersWithSpaces>462</o:CharactersWithSpaces>
<o:Version>11.9999</o:Version>
</o:DocumentProperties>
</xml><![endif]--><!--[if gte mso 9]><xml>
<w:WordDocument>
<w:SpellingState>Clean</w:SpellingState>
<w:GrammarState>Clean</w:GrammarState>
<w:ValidateAgainstSchemas/>
<w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid>
<w:IgnoreMixedContent>false</w:IgnoreMixedContent>
<w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText>
<w:Compatibility>
<w:UseFELayout/>
</w:Compatibility>
<w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel>
</w:WordDocument>
</xml><![endif]--><!--[if gte mso 9]><xml>
<w:LatentStyles DefLockedState="false" LatentStyleCount="156">
</w:LatentStyles>
</xml><![endif]--><!--[if !mso]><object
classid="clsid:38481807-CA0E-42D2-BF39-B33AF135CC4D" id=ieooui></object>
<style>
st1\:*{behavior:url(#ieooui) }
</style>
<![endif]-->
<style>
<!--
/* Font Definitions */
@font-face
{font-family:"MS Mincho";
panose-1:2 2 6 9 4 2 5 8 3 4;
mso-font-alt:"\FF2D\FF33 \660E\671D";
mso-font-charset:128;
mso-generic-font-family:modern;
mso-font-pitch:fixed;
mso-font-signature:-1610612033 1757936891 16 0 131231 0;}
@font-face
{font-family:"\@MS Mincho";
panose-1:2 2 6 9 4 2 5 8 3 4;
mso-font-charset:128;
mso-generic-font-family:modern;
mso-font-pitch:fixed;
mso-font-signature:-1610612033 1757936891 16 0 131231 0;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{mso-style-parent:"";
margin:0in;
margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:12.0pt;
font-family:"Times New Roman";
mso-fareast-font-family:"MS Mincho";
color:black;}
a:link, span.MsoHyperlink
{color:blue;}
a:visited, span.MsoHyperlinkFollowed
{color:blue;}
span.SpellE
{mso-style-name:"";
mso-spl-e:yes;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;
mso-header-margin:.5in;
mso-footer-margin:.5in;
mso-paper-source:0;}
div.Section1
{page:Section1;}
-->
</style><!--[if gte mso 10]>
<style>
/* Style Definitions */
table.MsoNormalTable
{mso-style-name:"Table Normal";
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-parent:"";
mso-padding-alt:0in 5.4pt 0in 5.4pt;
mso-para-margin:0in;
mso-para-margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:10.0pt;
font-family:"Times New Roman";
mso-fareast-font-family:"Times New Roman";
mso-ansi-language:#0400;
mso-fareast-language:#0400;
mso-bidi-language:#0400;}
</style>
<![endif]--><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="5122"/>
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1"/>
</o:shapelayout></xml><![endif]-->
<div class="Section1">
<p class="MsoNormal"><b>Allan <span class="SpellE">Sindelar</span></b><br>
<span style="font-size:10.0pt"><a
href="mailto:Allan@positiveenergysolar.com"><u><span
style="color:#000099">Allan@positiveenergysolar.com</span></u></a></span><br>
<span style="font-size:10.0pt">NABCEP Certified PV
Installation Professional<br>
NABCEP Certified Technical Sales Professional<br>
New Mexico EE98J Journeyman Electrician<br>
Founder, <b>Positive Energy, Inc.<o:p></o:p></b></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">A
Certified B <span class="SpellE">Corporation<sup><span
style="font-size:7.5pt">TM</span></sup></span><br>
<st1:address w:st="on"><st1:street w:st="on">3209
Richards Lane</st1:street><br>
<st1:city w:st="on">Santa Fe</st1:city>, <st1:state
w:st="on">New Mexico</st1:state> <st1:postalcode
w:st="on">87507</st1:postalcode></st1:address><br>
<b>505 424-1112 office 780-2738 cell</b><br>
<a href="http://www.positiveenergysolar.com/"
target="_blank"><u>www.positiveenergysolar.com</u></a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt"><span
style="mso-spacerun:yes"> </span></span></p>
</div>
</o:smarttagtype></o:smarttagtype></o:smarttagtype></o:smarttagtype></o:smarttagtype></div>
On 10/2/2013 9:01 AM, Mac Lewis wrote:<br>
</div>
<blockquote
cite="mid:CAOABG49KB_GNFbnC4F53DJ4ncLnEVSjxQP=RxRftE2E7bj_BJw@mail.gmail.com"
type="cite">
<div dir="ltr">Hi wrenches,
<div><br>
</div>
<div>I have some folks that I'm meeting in a couple of days that
have 4 Trace SW 5048 inverters. It's a very large, older
compound-style installation that the original installer has
bailed on. They have it set up so that there is a common
battery bank and each pair of series stacked inverters are
independently feeding 2 separate 120/240 busses. One of these
120/240 services gets utilized very heavily, and one isn't
really used at all. Is it possible with this type of
inverter, to have all four inverters feeding a common AC bus,
two feed Phase A and the other two feeding phase B?</div>
<div><br>
</div>
<div>I know that is possible to series stack and to parallel
stack this inverter, but can you do both at the same time?</div>
<div><br>
</div>
<div>If so, does anyone have a pin out to a parallel stacking
cable?</div>
<div><br>
</div>
<div>Thanks in advance</div>
<div>
<div><br>
</div>
-- <br>
<div><br>
</div>
<div><font face="'times new roman', serif" color="#305A78"><br>
</font></div>
<div><br>
</div>
Mac Lewis<br>
<br>
<span style="font-family:'Times New
Roman';font-size:medium;color:rgb(255,153,0)"><b><font
face="Arial, Helvetica, sans-serif" size="3">
<p align="left">
<font face="Verdana, Arial, Helvetica, sans-serif"
color="#000000"><span style="font-size:small"><span
style="font-family:arial;font-weight:normal;color:rgb(48,90,120)"><font
face="'times new roman', serif">"Yo solo sé
que no sé nada." </font><span
style="font-weight:700;color:rgb(104,104,104)"><font
face="'times new roman', serif">-Sócrates</font></span></span></span></font></p>
</font></b></span>
</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
List sponsored by Home Power magazine
List Address: <a class="moz-txt-link-abbreviated" href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a>
Change email address & settings:
<a class="moz-txt-link-freetext" href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a>
List-Archive: <a class="moz-txt-link-freetext" href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a>
List rules & etiquette:
<a class="moz-txt-link-abbreviated" href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a>
Check out participant bios:
<a class="moz-txt-link-abbreviated" href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a>
</pre>
</blockquote>
<br>
</body>
</html>