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Allan<br>
The MNSPD115 is designed for low voltage. As you pointed out 90VAC
or less. So there is a chance it was conducting some and causing the
Outback to stay awake. The Proper use of the MNSPD115 is for Low
voltage control circuits and the likes. <br>
<br>
In the case of 120VAC or 120/240VAC the MNSPD300 is the proper
choice.<br>
<br>
I apologize for the confusion and promise to look over the website
and literature asap. <br>
<br>
Ryan<br>
<img src="cid:part1.07050902.05040101@kb1uas.com" border="0"><br>
<br>
<div class="moz-cite-prefix">On 8/13/2013 2:22 PM, Allan Sindelar
wrote:<br>
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<div class="moz-cite-prefix">Ryan,<br>
I may have found the answer to my original post, but it raises
more questions. <br>
<br>
I wrote that these were MV units (MNSPD300), but I checked with
my lead tech and learned that in both cases he used LV units
(MNSPD115). Could this be the reason? He told me that he has
used the LV with 120V inverters and the MV with 120/240V
inverters. The instruction manual states that the LV units are
designed to be used on nominal 90VAC and 115VDC circuits, and
have a Maximum Continuous Operating Voltage of 180V. The manual
states: "The MidNite Solar SPD voltage rating should be chosen
according to the nominal voltage of the system. Do not install
an SPD with Maximum Continuous Operating Voltage (MCOV) below
the nominal voltage of the system; this will deteriorate the SPD
and making it unavailable when you most need it." If this is
true, then the LV (with its 180 MCOV) should be fine at 120VAC.
The instructions are confusing: should we use an MNSPD115 or an
MNSPD300 with 120VAC output? And in this case, could this be the
cause of the failure-to-sleep problem?<br>
<br>
If we should be using the MNSPD300 with 120VAC inverter output,
then the description on the Midnite website is confusing at
best. It states that the MNSPD115 "is designed for both AC and
DC systems and provides protection to service panels, load
centers or where the SPD is directly connected to the electronic
device requiring protection." But service panels and load
centers seldom if ever carry AC at less than 90VAC, the nominal
rating of the MNSPD115. Please clarify all of this!<br>
<br>
Thanks, Allan<br>
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On 8/13/2013 11:28 AM, Ryan wrote:<br>
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Allan<br>
That is not expected behavior. Which model of SPD are you using?<br>
<br>
Ryan<br>
<img src="cid:part2.09030603.07050400@kb1uas.com" border="0"><br>
<br>
<br>
<div class="moz-cite-prefix">On 8/13/2013 1:08 PM, Allan
Sindelar wrote:<br>
</div>
<blockquote cite="mid:520A680E.1050302@positiveenergysolar.com"
type="cite">
<meta http-equiv="content-type" content="text/html;
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Wrenches,<br>
Very seldom do inverters in off grid systems ever go to sleep
anymore, given the increase in phantom electronic loads and
greater customer expectations. Coupled with lower module
prices, we usually size larger arrays and inverters remain on
continuously. However, we also service and upgrade many
existing systems, and some customers still want their
inverters to go into search mode. They typically either have
gotten used to a more energy frugal lifestyle over many years,
or (to their credit) choose to buck the system and live with a
lighter energy and resource footprint. <br>
<br>
Twice in recent months we have added Midnite MNSPD MV surge
arrestors to the AC output of smaller systems and discovered
that the inverters will no longer go into search mode. It
doesn't appear to make any difference where the search watts
threshhold is set. One system used a 24V Outback FX2524T (with
current boards following a nearby lightning strike) and the
other used a Magnum MS2812. In the former case, we defeated
the search (against the customer's preference, as she liked
the total silence once her day was done). In the latter, the
customer rejected and we removed the surge arrestor once it
became clear that the inverter wouldn't sleep.<br>
<br>
Has anyone else experienced this? Is there a fix for it?
Robin, can you chime in here (off list if necessary; I'll
carefully post your response)?<br>
<br>
Thank you,<br>
Allan<br>
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<p class="MsoNormal"><b>Allan <span class="SpellE">Sindelar</span></b><br>
<span style="font-size:10.0pt"><a moz-do-not-send="true"
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 and Chief Technology Officer<br>
<b>Positive Energy, Inc.</b>, a Certified B <span
class="SpellE">Corporation<sup><span
style="font-size:7.5pt">TM</span></sup></span><br>
3209 Richards Lane<br>
Santa Fe, New Mexico 87507<br>
<b>505 424-1112 office 780-2738 cell</b><br>
<a moz-do-not-send="true"
href="http://www.positiveenergysolar.com/"
target="_blank"><u>www.positiveenergysolar.com</u></a><o:p></o:p></span></p>
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