<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<p><font size="4">This was my first thought too. An ac disconnect
that is readily available that controls the ac conductors to the
back up loads panel(s) would be less dangerous and has much less
worries about it failing. Chris</font><br>
</p>
<div class="moz-cite-prefix">On 1/27/2023 2:45 PM, Glenn Burt via
RE-wrenches wrote:<br>
</div>
<blockquote type="cite"
cite="mid:edt1797s94br7v42crraqccf.1674848634307@email.lge.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<style></style>
<div style="font-size: 10pt;">
<div dir="auto">Does the AHJ really want the batteries
disconnected from conductors, or does he really just want the
inverters to stop operating and producing AC within the house?</div>
<div dir="auto">Obviously there is a big difference here and it
may be changing as the code evolves.</div>
<div dir="auto"><br>
</div>
<div>
<div dir="auto" font-size:9pt;"="">-Glenn</div>
<div dir="auto" font-size:9pt;"="">Sent from my 'smart'phone,
so please excuse typos and spelling errors.</div>
</div>
</div>
<div style="font-size: 10pt;">
<div id="LGEmailHeader" dir="auto">
<div dir="auto"><br>
</div>
<div dir="auto">------ Original message------</div>
<div dir="auto"><b>From: </b>William Miller via RE-wrenches<re-wrenches@lists.re-wrenches.org></re-wrenches@lists.re-wrenches.org></div>
<div dir="auto"><b>Date: </b>Fri, Jan 27, 2023 2:26 PM</div>
<div dir="auto"><b>To: </b>RE-wrenches;</div>
<div dir="auto"><b>Cc: </b>William Miller;</div>
<div dir="auto"><b>Subject:</b>[RE-wrenches] Remote battery
disconnects</div>
<div dir="auto"><br>
</div>
</div>
<div dir="auto">
<div class="WordSection1">
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Verdana","sans-serif"">Friends:</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Verdana","sans-serif"">We
have a large-ish residential off-grid system install
coming up. The AHJ has said they will require a remote
battery disconnect. I suspect there will be fire
sprinkler controls and a pressure pump that would become
inoperable if this system were engaged. In this case we
will apply for a waiver.</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Verdana","sans-serif"">The
last time this was discussed here as far as I can find
was October of 2020. At that time no one suggested any
specific battery disconnect equipment. </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Verdana","sans-serif"">To
further clarify my needs: There will be 4 or 5 Radian
8048 inverters (5 or 6 4/0 battery circuits, ~350A each)
and two 175 amp PV recombiner outputs. That is 6 poles
of high amperage DC disconnects. </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Verdana","sans-serif"">The
battery array will be either a UnigyII VRLA or a lithium
of a brand yet to be determined. In the case of lithium
we will look for a system that can remotely enable a BMS
shutdown. In the case of a VRLA lead-acid, we will not
have that luxury.</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Verdana","sans-serif"">I
have done some considerable research and have not found
viable, high amperage, remotely activated shutdown
equipment.</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Verdana","sans-serif"">I
am wondering what hardware others may be using to
achieve remote battery disconnecting in these types of
cases..</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Verdana","sans-serif"">William</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif"">Miller
Solar</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif"">17395
Oak Road, Atascadero, CA 93422</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif""><a
href="tel:805-438-5600" moz-do-not-send="true">805-438-5600</a></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif""><a
href="http://www.millersolar.com/"
moz-do-not-send="true">www.millersolar.com</a></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif"">CA
Lic. 773985</span></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
</div>
</div>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
List sponsored by Redwood Alliance
Pay optional member dues here: <a class="moz-txt-link-freetext" href="http://re-wrenches.org">http://re-wrenches.org</a>
List Address: <a class="moz-txt-link-abbreviated" href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a>
Change listserver email address & settings:
<a class="moz-txt-link-freetext" href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a>
There are two list archives for searching. When one doesn't work, try the other:
<a class="moz-txt-link-freetext" href="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a>
<a class="moz-txt-link-freetext" href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a>
List rules & etiquette:
<a class="moz-txt-link-freetext" href="http://www.re-wrenches.org/etiquette.htm">http://www.re-wrenches.org/etiquette.htm</a>
Check out or update participant bios:
<a class="moz-txt-link-freetext" href="http://www.members.re-wrenches.org">http://www.members.re-wrenches.org</a>
</pre>
</blockquote>
<div class="moz-signature">-- <br>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div class="moz-signature">
<div class="moz-signature">
<div class="moz-signature">
<div class="moz-signature">
<div class="moz-signature">
<meta http-equiv="content-type" content="text/html;
charset=UTF-8">
<title></title>
<font face="PMingLiU-ExtB">
Christopher Warfel</font><br>
<font face="PMingLiU-ExtB"> ENTECH
Engineering, Inc.</font><br>
<font face="PMingLiU-ExtB">PO Box 871, Block Island, RI
02807</font><br>
<font face="PMingLiU-ExtB">
401-466-8978</font><br>
<font face="PMingLiU-ExtB"><a
href="http://entech-engineering.com"><img
moz-do-not-send="false"
src="cid:part1.HjDd2NPd.cQb0dTg9@entech-engineering.com"
alt="" width="274" height="121" border="0"></a><br>
</font><br>
<br>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>