<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>I have never seen an inverter that does not specify a OCPD size. </div><div><br></div><div>Jay</div><div>Peltz power. <br><br>Sent from my iPhone</div><div><br>On Jun 26, 2014, at 3:20 PM, Dave Click <<a href="mailto:daveclick@fsec.ucf.edu">daveclick@fsec.ucf.edu</a>> wrote:<br><br></div><blockquote type="cite"><div>
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Corey,<br>
<br>
The line of reasoning is faulty. It's 705.12(D)(1). Micro-inverters
are the exception because they are specially listed to share a
breaker. As for the other inverters, doubling them up on a single
breaker / disconnect probably goes against their installation
instructions [110.3(B)] and it's unlikely that you could put
multiple units on a single breaker anyway because when you take (2
inverters) x (rated current) x (1.25) you will probably come up with
a minimum breaker size that is larger than the maximum allowed under
the NRTL listing to UL 1741.<br>
<br>
Dave<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 2014/6/26, 16:18, Corey Shalanski
wrote:<br>
</div>
<blockquote cite="mid:CA+SmqZ29-HUrwOjJKtTArB3nN8xQzex9PtYe05FBc2UKJodPrA@mail.gmail.com" type="cite">
<div dir="ltr">We considered the necessity to shut down individual
inverters and determined that the added costs of an inverter
output combiner panel were not merited. I agree that in theory
it seems beneficial to be able to switch each inverter
individually, but how often does this occur in practice? For the
relatively infrequent cases where we need to return to a jobsite
and shut down an inverter - for troubleshooting/removal/etc. -
we do not mind shutting down the other inverters (up to a limit)
for what is hopefully a short period of time.
<div>
<br>
</div>
<div>Again, this whole line of reasoning may be shown to be
faulty if someone can directly point to the Code section that
requires OCPD on each individual inverter.</div>
<div><br>
</div>
<div>--</div>
<div>Corey<br>
<div hspace="streak-pt-mark" style="max-height:1px"><img moz-do-not-send="true" style="width:0px; max-height:0px;" src="https://mailfoogae.appspot.com/t?sender=aY3NoYWxhbnNraUBqb3VsZS1lbmVyZ3kuY29t&type=zerocontent&guid=59f6d492-9013-469d-af5f-e28b249c1b4b"><font color="#ffffff" size="1">ᐧ</font></div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Thu, Jun 26, 2014 at 9:20 AM, <span dir="ltr"><<a moz-do-not-send="true" href="mailto:re-wrenches-request@lists.re-wrenches.org" target="_blank">re-wrenches-request@lists.re-wrenches.org</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
Message: 5<br>
Date: Wed, 25 Jun 2014 19:17:57 -0700<br>
From: William Miller <<a moz-do-not-send="true" href="mailto:william@millersolar.com">william@millersolar.com</a>><br>
To: RE-wrenches <<a moz-do-not-send="true" href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br>
Subject: Re: [RE-wrenches] Combining Multiple Inverters<br>
Message-ID: <<a moz-do-not-send="true" href="mailto:04F4B8FD-E280-4BF2-B5A4-C2FCA8D1C7A6@millersolar.com">04F4B8FD-E280-4BF2-B5A4-C2FCA8D1C7A6@millersolar.com</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
Not allowed. You need a dedicated OCPD. Plus seems like
a really bad idea. How do you shut down just one
inverter?<br>
<br>
<br>
<br>
Miller Solar</blockquote>
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