<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:arial,helvetica,sans-serif;font-size:12pt"> It is smart to re-check the wiring in almost all 'factory wired' enclosures, no matter who they came from. Definitely check that the connections are tight, too. Especially for battery connections.<br><div> </div>Nick Soleil<br>Project Manager<br>Advanced Alternative Energy Solutions, LLC<br>PO Box 657<br>Petaluma, CA 94953<br>Cell: 707-321-2937<br>Office: 707-789-9537<br>Fax: 707-769-9037<div><br></div><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> R Ray Walters <ray@solarray.com><br><b><span style="font-weight: bold;">To:</span></b>
Allan@positiveenergysolar.com; RE-wrenches <re-wrenches@lists.re-wrenches.org><br><b><span style="font-weight: bold;">Sent:</span></b> Sat, July 24, 2010 10:46:12 PM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: [RE-wrenches] Midnite Magnum E-Panel Unofficial Service Bulletin<br></font><br>
<meta http-equiv="x-dns-prefetch-control" content="off">I usually recommend retorqueing all connectors once the panel is mounted. Whether its an E-panel or one we built at the shop, those washboard roads can loosen stuff that would never have had a problem<div>otherwise. I'm actually surprised we haven't had more problems like this, even with internal wiring on inverters, etc.</div><div>Hours of vibration can do bad things to equipment not designed for it.</div><div>Having said all that, I too have grown probably too complacent, and forget to check connections, especially if its hard to get to, and the sun is going down.....</div><div><br><div>
<span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;"><div>R. Walters</div><div><a rel="nofollow" ymailto="mailto:ray@solarray.com" target="_blank" href="mailto:ray@solarray.com">ray@solarray.com</a></div><div>Solar Engineer</div><div><br class="khtml-block-placeholder"></div><div><br class="khtml-block-placeholder"></div><br class="Apple-interchange-newline"></span>
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<br><div><div>On Jul 24, 2010, at 1:27 PM, Allan Sindelar wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
<div>
Wrenches, <br>
In the past month we have encountered some assembly errors on
preassembled E-Panels using the Magnum MS4448PAE and MS4024AE
inverters. Robin Gudgel has become aware of the problems and has
corrected them, but there may be other Wrenches who have installed
or plan to install these E-Panels and may be able to correct the
errors at installation. Robin has encouraged me to post this here.<br>
<br>
On all three E-Panels the same two problems were found. The first is
that the four signal wires (two twisted pairs) connected to the
Magnum ME-BMK sending unit for the remote display were loose enough
to pull out. In one case this prevented state-of-charge data from
being accessible on the display. The solution is simply to tighten
the terminals, but as this is a preassembled connection, checking
tightness could be overlooked. The second is that the white 14 awg
DC - conductor from the preinstalled array GFDI is terminated at the
white AC neutral bus. It should be connected to the DC - bus on the
shunt. Moving this will require splicing in a few inches of #14
solid white THHN, as the existing conductor is too short, but has a
resistor lead soldered to it, discouraging just replacing this wire
with a longer piece.<br>
<br>
It's a funny thing - it's easy to overlook these errors because we
expect the factory wiring to be correct. I missed these two errors,
and so did an experienced installer from our Taos branch who crewed
with me on one of the three installations. It took an inexperienced
but very skilled apprentice on his first day of his first
installation to discover both problems and bring them to my
attention. I have worked with Eden, the apprentice, on other
projects, so I trusted him to terminate correctly in the E-Panel.
Turns out it was his fresh eyes that caught what we had overlooked
because we hadn't expected it.<br>
Allan<br>
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<div class="Section1"><p class="MsoNormal" style=""><span class="il"><b style="">Allan</b></span><b style=""> Sindelar</b><span style="font-size: 10pt;"><br>
<a rel="nofollow" ymailto="mailto:Allan@positiveenergysolar.com" target="_blank" href="mailto:Allan@positiveenergysolar.com"><span class="il">Allan</span>@positiveenergysolar.com</a><br>
NABCEP Certified Photovoltaic Installer<br>
EE98J Journeyman Electrician<br>
<b style="">Positive Energy, Inc.</b><br>
3201 Calle Marie<br>
Santa Fe, New Mexico 87507<br>
<b style="">505 424-1112</b><br>
<a rel="nofollow" target="_blank" href="http://www.positiveenergysolar.com/">www.positiveenergysolar.com</a></span></p>
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