<font face="arial" size="4">Here is an old 2001 posting from Bill Brooks...<br><br>
<div class="moz-text-plain" wrap="true" graphical-quote="true" style="font-family: -moz-fixed; font-size: 14px;" lang="x-western"><pre wrap="">William, Marco, and Jeff C.,<br><br>Here is the method I found to be most effective:<br><br>INVERTER SETUP (MENU 9)<br>set to SELL<br><br>BATTERY CHARGING (MENU 10)<br>set ABSORPTION TIME to 0:00 on both machines.<br>set MAX CHARGE AMPS to 1 amp on both machines.<br><br>BATTERY SELLING (MENU 17)<br>set MAX SELL AMPS to X amps on both machines. (where 2X is the Max AC amps<br>that the PV array can produce. (e.g. 4000 Watts should set both to 18<br>amps --18A*120V=2160Watts)<br><br>Both temp comp probes must be installed so as to operate at the same<br>temperature. I have tried adjusting the float setting and that also works<br>particularly for an inverter that is out of DC calibration. They still get<br>out of wack at times at different temperatures because the slope of the temp<br>comp probes are usually not the same. This should keep both machines selling<br>as evenly as they can and limit each machine to a maximum of half the AC<br>Watts output. The one amp MAX charge amps keeps one unit from charging while<br>the other one sells.<br><br>Try it and see how you like it.<br><br>Bill.<br><br><br>-----Original Message-----<br>From: William Miller [<a class="moz-txt-link-freetext" href="mailto:wrmiller@slonet.org">mailto:wrmiller@slonet.org</a>]<br>Sent: Wednesday, September 26, 2001 6:19 PM<br>To: <a class="moz-txt-link-abbreviated" href="mailto:RE-wrenches@topica.com">RE-wrenches@topica.com</a><br>Subject: RE: system output honesty [RE-wrenches]<br><br><br>Marco:<br><br>I must not have been very clear, but you don't necessarily end up with the<br>same numeric float voltage setting. Take the inverter with the lower<br>output and increase it's float voltage one increment at a time (I think it<br>adjusts in 0.2 volt increments) while checking sell amps. The change<br>should be immediate and obvious. (If it doesn't improve, try decreasing<br>float voltage because my memory may not be accurate.)<br><br>William<br><br><br><br>At 01:09 AM 9/26/01 -1000, you wrote:<br></pre><blockquote type="cite" style="color: rgb(51, 51, 255);"><pre wrap=""><span class="moz-txt-citetags">></span>William,<br><span class="moz-txt-citetags">></span><br><span class="moz-txt-citetags">></span>Maybe you have the magic touch with your dual SWs, but my dual SWs are set<br><span class="moz-txt-citetags">></span>at the same float voltage and, as Bill B. noted, they don't "share" those<br><span class="moz-txt-citetags">></span>incoming PV electrons very equitably.<br><span class="moz-txt-citetags">></span><br><span class="moz-txt-citetags">></span>On another note, has anyone received an AEI MM5 or MM3 yet?<br><span class="moz-txt-citetags">></span><br><span class="moz-txt-citetags">></span>marco<br><span class="moz-txt-citetags">></span>ProVision Technologies<br><span class="moz-txt-citetags">></span>Hilo, land of declining tourism Hawai'i<br><span class="moz-txt-citetags">></span><br><span class="moz-txt-citetags">></span>Friends:<br><span class="moz-txt-citetags">></span>With dual SW inverters (I believe, if memory serves me right) I finally<br><span class="moz-txt-citetags">></span>discovered that adjusting the float voltage until they both sell more or<br><span class="moz-txt-citetags">></span>less equally does the job of balancing.<br><span class="moz-txt-citetags">></span>William<br><span class="moz-txt-citetags">></span><br><span class="moz-txt-citetags">></span><br><span class="moz-txt-citetags">></span><br><span class="moz-txt-citetags">></span><br><span class="moz-txt-citetags">></span><br><span class="moz-txt-citetags">></span><br><span class="moz-txt-citetags">></span>At 05:04 PM 9/25/01 -0700, you wrote:<br></pre><blockquote type="cite" style="color: rgb(51, 51, 255);"><pre wrap=""><span class="moz-txt-citetags">>></span>Jeff C.,<br><span class="moz-txt-citetags">>></span><br><span class="moz-txt-citetags">>></span>It is less important with a small array, but it still will work slightly<br><span class="moz-txt-citetags">>></span>better. The much bigger issue with dual inverters in sell mode is that<br></pre></blockquote></blockquote><pre wrap=""><!---->they<br></pre><blockquote type="cite" style="color: rgb(51, 51, 255);"><pre wrap=""><span class="moz-txt-citetags">></span><br></pre><blockquote type="cite" style="color: rgb(51, 51, 255);"><pre wrap=""><span class="moz-txt-citetags">>></span>don't behave nicely with each other (they don't know how to share). One<br><span class="moz-txt-citetags">>></span>inverter invariably wins the conversion battle and the other inverter sits<br><span class="moz-txt-citetags">>></span>idle, or more likely, starts drawing power from the grid to fight the<br></pre></blockquote></blockquote><pre wrap=""><!---->other<br></pre><blockquote type="cite" style="color: rgb(51, 51, 255);"><pre wrap=""><span class="moz-txt-citetags">></span><br></pre><blockquote type="cite" style="color: rgb(51, 51, 255);"><pre wrap=""><span class="moz-txt-citetags">>></span>inverter.<br><span class="moz-txt-citetags">>></span><br><span class="moz-txt-citetags">>></span>I have yet to see a dual SW system on the grid the worked really well. You<br><span class="moz-txt-citetags">>></span>can trick them into working with various settings. I have a set of<br></pre></blockquote></blockquote><pre wrap=""><!---->settings<br></pre><blockquote type="cite" style="color: rgb(51, 51, 255);"><pre wrap=""><span class="moz-txt-citetags">></span><br></pre><blockquote type="cite" style="color: rgb(51, 51, 255);"><pre wrap=""><span class="moz-txt-citetags">>></span>that has worked well for me, others on the list may have their own<br></pre></blockquote></blockquote><pre wrap=""><!---->methods.<br></pre><blockquote type="cite" style="color: rgb(51, 51, 255);"><pre wrap=""><span class="moz-txt-citetags">></span><br></pre><blockquote type="cite" style="color: rgb(51, 51, 255);"><pre wrap=""><span class="moz-txt-citetags">>></span>If people are interested, we can do this onlist. If not, email me and I'll<br><span class="moz-txt-citetags">>></span>send them offlist.<br><span class="moz-txt-citetags">>></span><br><span class="moz-txt-citetags">>></span>Bill.<br><span class="moz-txt-citetags">>></span><br><span class="moz-txt-citetags">>></span><br></pre></blockquote></blockquote><pre wrap=""><!----><br><br>__________________________________________________________________<br>William Miller<br>SLO Communications: Communications and Power Systems Consulting<br>PO Box 50, Santa Margarita, CA 93453<br>Voice :805-438-5600 Fax: 805-438-4607 VMail: 805-546-4875<br>email: <a class="moz-txt-link-abbreviated" href="mailto:wrmiller@slonet.org">wrmiller@slonet.org</a><br>License No. C-10-773985<br>_____________________________________________________________<br>Compatibility:<br>Word processor: WP7<br>Spreadsheet: Quatro Pro 7<br>CAD: Microstation 95, DXF, Visio 4.1T<br>_____________________________________________________________<br>"I stand by all the misstatements that I've made." Dan Quayle<br>__________________________________________________________________<br><br>- - - -<br>To send a message: <a class="moz-txt-link-abbreviated" href="mailto:RE-wrenches@topica.com">RE-wrenches@topica.com</a><br><br>Archive of previous messages: <a class="moz-txt-link-freetext" href="http://www.topica.com/lists/RE-wrenches/">http://www.topica.com/lists/RE-wrenches/</a><br><br>List rules & etiquette: <a class="moz-txt-link-freetext" href="http://www.mrsharkey.com/wrenches/etiquete.htm">http://www.mrsharkey.com/wrenches/etiquete.htm</a><br><br>Check out participant bios: <a class="moz-txt-link-abbreviated" href="http://www.mrsharkey.com/wrenches/index.html">www.mrsharkey.com/wrenches/index.html</a><br><br>Hosted by Home Power magazine<br><br>Moderator: <a class="moz-txt-link-abbreviated" href="mailto:michael.welch@homepower.com">michael.welch@homepower.com</a><br><br>- - - -<br>To send a message: <a class="moz-txt-link-abbreviated" href="mailto:RE-wrenches@topica.com">RE-wrenches@topica.com</a><br><br>Archive of previous messages: <a class="moz-txt-link-freetext" href="http://www.topica.com/lists/RE-wrenches/">http://www.topica.com/lists/RE-wrenches/</a><br><br>List rules & etiquette: <a class="moz-txt-link-freetext" href="http://www.mrsharkey.com/wrenches/etiquete.htm">http://www.mrsharkey.com/wrenches/etiquete.htm</a><br><br>Check out participant bios: <a class="moz-txt-link-abbreviated" href="http://www.mrsharkey.com/wrenches/index.html">www.mrsharkey.com/wrenches/index.html</a><br><br>Hosted by Home Power magazine<br><br>Moderator: <a class="moz-txt-link-abbreviated" href="mailto:michael.welch@homepower.com">michael.welch@homepower.com</a><br><br>==^================================================================<br>EASY UNSUBSCRIBE click here: <a class="moz-txt-link-freetext" href="http://topica.com/u/?bz8Qcs.bAfWTr">http://topica.com/u/?bz8Qcs.bAfWTr</a><br>Or send an email To: <a class="moz-txt-link-abbreviated" href="mailto:RE-wrenches-unsubscribe@topica.com">RE-wrenches-unsubscribe@topica.com</a><br>This email was sent to: <a class="moz-txt-link-abbreviated" href="mailto:toddcory@jps.net">toddcory@jps.net</a><br><br>T O P I C A -- Register now to manage your mail!<br><a class="moz-txt-link-freetext" href="http://www.topica.com/partner/tag02/register">http://www.topica.com/partner/tag02/register</a><br>==^================================================================<br><br><br></pre></div><br><br>On Tuesday, November 17, 2009 2:18pm, "Dana" <dana@solarwork.com> said:<br><br>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 12 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Arial","sans-serif";
color:windowtext;
font-weight:normal;
font-style:normal;}
.MsoChpDefault
{mso-style-type:export-only;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.Section1
{page:Section1;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</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"><span style="font-family: "Arial","sans-serif";">Hey all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family: "Arial","sans-serif";"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family: "Arial","sans-serif";">I have a
client who was off grid and is now grid tied and has [2] Trace SW 4024
Inverters. I realize the parameters are not the best for high efficiency but the
client is not into changing out to newer equipment.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family: "Arial","sans-serif";"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family: "Arial","sans-serif";">Whom at which
telephone @ Xantrex might be the best bet to talk to for programming advice for
grid tie application for the SW 4024 inverters?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family: "Arial","sans-serif";"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);">Dana
Orzel<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);">Great
Solar Works, Inc<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);">www.solarwork.com<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);">E
- dana@solarwork.com<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);">V
- 970.626.5253<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);">F
- 970.626.4140<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);">C
- 970.209.4076<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(79, 129, 189);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);">I
will be the shift in how the world uses power! - Dana Orzel<o:p></o:p></span></p>
</div>
</font>