<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 12 (filtered medium)">
<title>Magnum MS4448AE Compatibility Question</title>
<style>
<!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:g;
panose-1:0 0 0 0 0 0 0 0 0 0;}
/* 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;
font-size:10.0pt;}
@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]-->
</head>
<body lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>I have hit
this one a couple of times but not with the equipment you are listing. It
turned out to be how the sine wave crossed the X axis and the controls did not
like the wave form.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks
-<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Dana
Orzel<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Great
Solar Works, Inc<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>www.solarwork.com<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>E
- dana@solarwork.com<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>V
- 970.626.5253<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>F
- 970.626.4140<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>C
- 970.209.4076<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>“I'd
put my money on solar energy… I hope we don't have to wait 'til oil and
coal run out before we tackle that.”</span><span lang=EN
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>—Thomas
Edison, in conversation with Henry Ford and Harvey Firestone, March 1931</span><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal style='margin-left:.5in'><b><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Allan
Sindelar<br>
<b>Sent:</b> Monday, February 09, 2009 11:16 AM<br>
<b>To:</b> RE Wrenches<br>
<b>Subject:</b> [RE-wrenches] Magnum MS4448AE Compatibility Question<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>
<p style='margin-left:.5in'>Wrenches, <br>
We have an unusual problem, and I need to know if anyone else has had this or a
related problem, and what to do about it.<o:p></o:p></p>
<p style='margin-left:.5in'>This concerns a new off-grid residential system,
very conventional: 1,800W PV, Midnite E-Panel with Magnum MS4448-AE inverter,
MX60, 16 S-460s, installed summer 2008. This existing home is being extensively
remodeled, and the home is not yet occupied. A local mechanical contractor
installed a new infloor radiant (gypcrete) hydronic heating system using a
Netherlands-made (German company) Buderus GB142 high-efficiency boiler. The
problem is that the boiler won't start reliably on the inverter. It appears
that the hot-surface igniter does not get full AC voltage (it runs on straight
120V AC, but is supplied through the boiler's control circuitry). We tested the
igniter by disconnecting it and plugging it straight into inverter AC and it
lit right up. <o:p></o:p></p>
<p style='margin-left:.5in'>The mechanical contractor has tried a replacement
Buderus GB142 boiler with the same result. I was told that they brought out a
generator and it also failed to ignite on generator AC, but not knowing the
generator used or the way it was wired (I believe an extension cord to a
portable) I don't put much weight on this data. They also took a Lochinvar
Boiler to the site to test the theory that a different manufacturer's boiler
might work. The Lochinvar boiler, which uses a different control and a spark
ignition rather than a hot surface igniter, worked on site without any
problems.<o:p></o:p></p>
<p style='margin-left:.5in'>I'm looking for solutions. Magnum tech support had
not heard of this. Have you? <br>
Also, if indeed we have an inverter that is incapable of running this load, how
do we make it right to the homeowner and the mechanical contractor? What should
be Magnum's obligation? What should be ours? This issue hasn't come up here
since the days when the Trace SW mod-sine series was the waveform standard.<o:p></o:p></p>
<p style='margin-left:.5in'>Thanks, <br>
<span style='font-family:"g","serif"'>Allan Sindelar</span> <br>
<a href="mailto:allan@positiveenergysolar.com"><span style='font-size:10.0pt;
font-family:"g","serif"'>allan_(at)_positiveenergysolar.com</span></a> <br>
<span style='font-size:10.0pt;font-family:"g","serif"'>NABCEP certified solar
PV installer</span> <br>
<span style='font-size:10.0pt;font-family:"g","serif"'>Positive Energy, Inc.</span>
<br>
<span style='font-size:10.0pt;font-family:"g","serif"'>3225A Richards Lane</span>
<br>
<span style='font-size:10.0pt;font-family:"g","serif"'>Santa Fe NM 87507</span>
<br>
<span style='font-size:10.0pt;font-family:"g","serif"'>505 424-1112</span> <o:p></o:p></p>
</div>
</body>
</html>