<font size=2 face="sans-serif">Hi:</font>
<br>
<br><font size=2 face="sans-serif">Prior to my current role in training
I was working in product development. Regarding minimum mounting
clearances, inverter manufacturers are required to test their equipment
so that no component inside goes above its rated temperature during normal
operation at a specified ambient temperature. At temperatures above
that the unit must behave in ways which maintains the internal temperatures
of all components within their spec, (typically the inverter derates).</font>
<br>
<br><font size=2 face="sans-serif">The test for what gets published is
done in a set-up where there are walls on both sides, top and bottom, but
the very front surface of the enclosure is left open at a distance of 36"
as shown in the diagram below.</font>
<br>
<br><img src=cid:_1_0D3419C007DD9CA8005FBCEB88257D7A>
<br>
<br><font size=2 face="sans-serif">As a rule of thumb when comparing inverter
specs, looking at the minimum clearances and specified normal ambient temperature
will give you a good indication of how well the unit dissipates heat. If
the manufacturer specifies very tight clearances at a higher ambient temp,
then you know that the device is able to dissipate heat well and will in
fact run cooler if given more room to breathe.</font>
<br>
<br><font size=2 face="sans-serif">As inverter manufacturers we don't,
(and really cant), stay abreast of all the installation codes which apply
in the US and throughout the rest of the world. What we do is to
try to make sure the our bottom clearance minimum is less than what is
allowed in the codes.</font>
<br>
<br><font size=2 face="sans-serif">JARMO</font>
<br><font size=2 face="sans-serif"><br>
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Schneider Electric </b></font><font size=1 face="Arial"><b> | Solar
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<table width=100%>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">From:</font>
<td><font size=1 face="sans-serif">Dave Click <daveclick@fsec.ucf.edu></font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">To:</font>
<td><font size=1 face="sans-serif">re-wrenches@lists.re-wrenches.org, </font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Date:</font>
<td><font size=1 face="sans-serif">10/23/2014 09:45 AM</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Subject:</font>
<td><font size=1 face="sans-serif">Re: [RE-wrenches] Mounting height</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Sent by:</font>
<td><font size=1 face="sans-serif">"RE-wrenches" <re-wrenches-bounces@lists.re-wrenches.org></font></table>
<br>
<hr noshade>
<br>
<br>
<br><font size=3>I believe that I was told in a 2005-ish Xantrex GT training
that their minimum clearance (~30") requirement came from the need
to be above lawn sprinklers. I can't remember offhand seeing this reason
given in any recent manual, so any bottom clearances required in the manual
may apply to you even if you're inside.<br>
<br>
</font>
<br><font size=3>On 2014/10/23 0:59, frenergy wrote:</font>
<br><font size=3>Bob-O, Peter, Garrison,</font>
<br><font size=3> </font>
<br><font size=3> I appreciate the
responses, will proceed accordingly. I have seen some references
to minimum distance to floor in some manuals. Thank you,</font>
<br><font size=3> </font>
<br><font size=3>Bill</font>
<br><font size=3>Feather River Solar Electric</font>
<br><font size=3> </font>
<br><font size=3>----- Original Message ----- </font>
<br><font size=3><b>From:</b> </font><a href=mailto:garrison@solarserviceinc.com><font size=3 color=#0082bf><u>Garrison
Riegel</u></font></a><font size=3> </font>
<br><font size=3><b>To:</b> </font><a href="mailto:re-wrenches@lists.re-wrenches.org"><font size=3 color=#0082bf><u>'RE-wrenches'</u></font></a><font size=3>
</font>
<br><font size=3><b>Sent:</b> Wednesday, October 22, 2014 11:11 AM</font>
<br><font size=3><b>Subject:</b> Re: [RE-wrenches] Mounting height</font>
<br>
<br><font size=2 color=#004080 face="Calibri">Bill,</font>
<br><font size=2 color=#004080 face="Calibri"> </font>
<br><font size=2 color=#004080 face="Calibri">See 2011 NEC 690.14(D) or
2014 NEC 690.15(A) Utility-Interactive Inverters Mounted in Not Readily
Accessible Locations. Basically there is no maximum height restriction
for inverters but there are a number of requirements for AC and DC disconnecting
means. See NEC 404.8 for maximum disconnect height of 6’ 7”…although
exception No. 2 may allow the disconnect to be accessible by portable means.
I don’t know of any minimum height requirements in the code, although
most (all?) string and microinverter manufacturers specify a required clearance
below the inverter. I suppose that would be the minimum. </font>
<br><font size=2 color=#004080 face="Calibri"> </font>
<br><font size=2 color=#004080 face="Calibri">Garrison </font>
<br><font size=2 color=#004080 face="Calibri"> </font>
<br><font size=2 color=#37605e face="Calibri">Garrison Riegel</font>
<br><font size=2 color=#37605e face="Calibri">Project Manager | </font><a href=http://www.solarserviceinc.com/><font size=2 color=#2f2f2f face="Calibri"><i><u>Solar
Service Inc</u></i></font></a>
<br><font size=2 color=#37605e face="Calibri">[p] 847-677-0950 | </font><a href=mailto:garrison@solarserviceinc.com><font size=2 color=#37605e face="Calibri">garrison@solarserviceinc.com</font></a>
<br><font size=2 color=#37605e face="Calibri"> </font>
<br><font size=2 color=#37605e face="Calibri">NABCEP Certified PV Installation
Professional™</font>
<br><font size=2 color=#004080 face="Calibri"> </font>
<br><font size=2 color=#004080 face="Calibri"> </font>
<br><font size=2 face="Calibri"><b>From:</b> RE-wrenches [</font><a href="mailto:re-wrenches-bounces@lists.re-wrenches.org"><font size=2 color=#0082bf face="Calibri"><u>mailto:re-wrenches-bounces@lists.re-wrenches.org</u></font></a><font size=2 face="Calibri">]
<b>On Behalf Of </b>frenergy<b><br>
Sent:</b> Tuesday, October 21, 2014 11:02 PM<b><br>
To:</b> RE-wrenches<b><br>
Subject:</b> [RE-wrenches] Mounting height</font>
<br><font size=3 face="Times New Roman"> </font>
<br><font size=3 face="Times New Roman">Wrenches,</font>
<br><font size=3 face="Times New Roman"> </font>
<br><font size=3 face="Times New Roman">
I can't seem to find a reference to the heights allowable for inverter
installs, either minimum or maximum (need both). For that matter,
AC combiners, DC discos, any switchgear related to the inverter(s).</font>
<br><font size=3 face="Times New Roman"> </font>
<br><font size=3 face="Times New Roman">
Any help appreciated.</font>
<br><font size=3 face="Times New Roman"> </font>
<br><font size=3 face="Times New Roman">Bill</font>
<br><font size=3 face="Times New Roman">Feather River Solar Electric</font>
<br><font size=3 face="Times New Roman">solar powered since 1982</font>
<p>
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