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<p>The supply side switch needs the Neutral-GEC bond. There should
also be one in the Main Service Panel. Although just looking at
250.142 (A) it says "shall be permitted". So, that is a little
confusing to me. I always have had that bond for this type of
connection. Chris</p>
<div class="moz-cite-prefix">On 10/23/2025 9:07 AM, Dave Tedeyan via
RE-wrenches wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAM3Q7f0uZ_UcCT+S35ONnyWP-7q=6+eBoDwiuf6YxyNS1JmAEA@mail.gmail.com">
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<div>Hi All, </div>
<div><br>
</div>
<div>For years I have understood that when doing a supply side
connection, you are supposed to bond the neutral to ground in
the solar service disconnect. I have a Midnite AIO system with
two inverters (set up as a supply side connection) that
recently was getting a CA-DC link Overvoltage error. When
talking to Midnite, their first response was to make sure that
there was only one N-G bond in the whole system. When I
mentioned that the solar is a separate service and thus there
is a N-G bond in both the main panel and the inverter
distribution panel, they said to remove it from the inverter
distribution panel. I want to make the system work right, but
I also am hesitant to do something against how I have
understood the NEC to be for a long time. I am curious if you
all have thoughts on this or run into a similar situation.</div>
<div><br>
</div>
<div>Cheers, </div>
<div>Dave</div>
<div><br>
</div>
<span class="gmail_signature_prefix">-- </span><br>
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<td width="125" valign="top" rowspan="6"
style="padding:0px 10px 0px 0px;font-size:10pt;border-right:1px solid rgb(236,189,0);width:125px;vertical-align:top"><a
href="https://www.sungineersolar.com/"
style="color:rgb(51,122,183);background-color:transparent"
target="_blank" moz-do-not-send="true"><img
border="0" alt="Logo" width="105"
src="https://sungineersolar.com/wp-content/uploads/2019/08/Logo-Image-Only-1.png"
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<td valign="top"
style="padding:0px 0px 5px 10px;width:400px;vertical-align:top"><span
style="color:rgb(236,189,0);font-size:11pt;font-weight:700">Dave
Tedeyan, P.E.<br>
</span><span
style="font-size:11pt;font-weight:700"><font color="#ecbd00">Owner |
Sungineer Solar</font><br>
</span></td>
</tr>
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<td valign="top"
style="padding:5px 0px 5px 10px;font-size:10pt;vertical-align:top;line-height:17px"><span
style="color:rgb(236,189,0)"><span
style="font-weight:700">p: </span></span><span
style="font-size:10pt;color:rgb(0,0,0)">he | him | his</span><span
style="color:rgb(236,189,0)"><span
style="font-weight:700"><br>
a: </span></span><span
style="font-size:10pt;color:rgb(0,0,0)">1653 Slaterville Rd.</span> <span
style="font-size:10pt;color:rgb(0,0,0)">| Ithaca, NY 14850</span><br>
<span style="color:rgb(236,189,0)"><span
style="font-weight:700">w:</span></span><a
href="http://www.sungineersolar.com/" rel="noopener"
style="color:rgb(51,122,183);background-color:transparent"
target="_blank"
moz-do-not-send="true"><span
style="font-size:10pt;color:rgb(0,0,0)"> www.sungineersolar.com</span></a><br>
<span style="color:rgb(236,189,0)"><span
style="font-weight:700">c:</span></span><span
style="font-size:10pt;color:rgb(0,0,0)"> (607) 270-0370</span></td>
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<pre class="moz-signature" cols="72">--
Christopher Warfel, PE
ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
(401) 447-5773</pre>
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