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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Our experience in MA with rapid shutdown unfortunately varies with AHJ. Some are letting us put an Eaton NEMA 4 disconnect on the roof next to the array. Some are letting
us put a disconnect in an accessible attic within 5’ of the penetration. Some are requiring the Midnight Birdhouse remote switch which is expensive.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Rapid shutdown doesn’t apply to pole or ground mounts.
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Hope this helps.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Will<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#999999">Will White</span></b><br>
<span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#999999">Operations Manager - New England
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#999999">RGS Energy</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#999999">64 Main St.
</span><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#B9B9B9">|</span><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#999999">Montpelier, VT 05602<br>
tel 802.223.7804 </span><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#B9B9B9">|</span><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#999999"> mobile 802.234.3167
</span><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#B9B9B9">|</span><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#999999"> fax 802.223.8980</span><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#FCB033"><a href="http://www.rgsenergy.com/"><span style="color:#FCB033;text-decoration:none">RGSEnergy.com</span></a>
</span></b><b><span style="font-size:7.5pt;font-family:"Calibri","sans-serif";color:#FCB033">|
<a href="mailto:william.white@rgsenergy.com"><span style="color:#FCB033;text-decoration:none">william.white@rgsenergy.com</span></a>
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<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Calibri","sans-serif";color:#8A8A8A">Confidentiality Note:
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> RE-wrenches [mailto:re-wrenches-bounces@lists.re-wrenches.org]
<b>On Behalf Of </b>Mac Lewis<br>
<b>Sent:</b> Wednesday, August 27, 2014 8:32 AM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> [RE-wrenches] Rapid shutdown questions<o:p></o:p></span></p>
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<p class="MsoNormal">Hello wrenches,<o:p></o:p></p>
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<p class="MsoNormal">I am still trying to wrap my head around how to comply with rapid shutdown in off-grid and hybrid situations. I've got a few questions that maybe you can help with.<o:p></o:p></p>
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<p class="MsoNormal">1. What is a (currently listed) rapid shutdown system that will accommodate 8 strings? I know I can do this with Midnite combiners but as I understand these aren't listed yet.<o:p></o:p></p>
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<p class="MsoNormal">2. On a remote pole mount, does rapid shutdown apply? If the intent is to isolate a safe zone around an array for fire fighting, it seems as though a standard pole mounted DC disconnect can cover this concern.<o:p></o:p></p>
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<p class="MsoNormal">3. I estimate on a typical hybrid installation, rapid shutdown will cost at least $3000 to implement. This includes remote shunt trip battery breakers, contactors on PV side of charge controller and roof combiners, and running control
cable from remote disconnect to all locations. As of now, this would also require me to modify listed interconnection equipment. Is this what others are finding?<o:p></o:p></p>
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<p class="MsoNormal">4. AC coupling with microinverters may be the easiest way to comply with most of these requirements. However, this doesn't seem like a great alternative to the standard charge controller installation in an off-grid system.<o:p></o:p></p>
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<p class="MsoNormal">Thanks in advance for your thoughts<o:p></o:p></p>
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<p class="MsoNormal">-- <o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Mac Lewis<b><span style="font-family:"Arial","sans-serif";color:#FF9900"><o:p></o:p></span></b></p>
<p><span style="color:#305A78">"Yo solo sé que no sé nada." </span><b><span style="color:#686868">-Sócrates</span></b><b><span style="font-family:"Arial","sans-serif";color:#FF9900"><o:p></o:p></span></b></p>
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