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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Then how do we install microinverters? 705.12(D)(1) says OCPD for each inverter is required at the point of interconnection with distribution equipment. But
as long as the conductors are sized to the OCPD, we follow the branch-circuit/feeder tap rules, and the inverter’s maximum OCPD limit is not exceeded, what is the issue? I’m assuming the inverter’s maximum OCPD is usually the limiting factor, but I’ve been
intrigued by the fact that the ABB TRIO has an option for AC OCPD in the inverter – it seems like there must be a cost-effective solution for tapping a trunk cable with a string inverter just as we do with microinverters. Has anyone tried this?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="line-height:12.0pt;text-autospace:none"><b><span style="font-size:8.0pt;font-family:"Verdana","sans-serif";color:#5F5F5F">Isaac Opalinsky
</span></b><span style="font-size:8.0pt;font-family:"Verdana","sans-serif";color:#5F5F5F">| Technical Trainer |
<b>SunPower Corporation<o:p></o:p></b></span></p>
<p class="MsoNormal" style="line-height:12.0pt;text-autospace:none"><span style="font-size:8.0pt;font-family:"Verdana","sans-serif";color:#5F5F5F">Desk 443-569-3476 | Cell 443-277-6286<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> RE-wrenches [mailto:re-wrenches-bounces@lists.re-wrenches.org]
<b>On Behalf Of </b>Glenn Burt<br>
<b>Sent:</b> Wednesday, June 25, 2014 10:19 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] Combining Multiple Inverters<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Code requires OCPD on the output of each inverter, so not sure where the savings would be..<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><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""><a href="mailto:cshalanski@joule-energy.com">Corey Shalanski</a></span><br>
<b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Sent: </span>
</b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">6/25/2014 21:19</span><br>
<b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">To: </span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a></span><br>
<b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Subject: </span>
</b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">[RE-wrenches] Combining Multiple Inverters</span><o:p></o:p></p>
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<p class="MsoNormal">I am curious about best practices for combining the output of multiple inverters:
<o:p></o:p></p>
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We are considering using an insulated tap "Polaris/Burndy" connector in lieu of a solar accumulation panel. We would then run the output of this tap connector through a fused disconnect and on to the interconnection. Does anyone else do this?
<o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
In the above scenario, how should we size the wire between each inverter's output and the tap connector? Since there is no OCPD on this wire, would we have to use the same wire gauge as the combined output? or can we get away with sizing each wire according
to its associated inverter output rating? <o:p></o:p></li></ul>
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<p class="MsoNormal">--<o:p></o:p></p>
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<p class="MsoNormal">Corey Shalanski<o:p></o:p></p>
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<p class="MsoNormal">Joule Energy<o:p></o:p></p>
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<p class="MsoNormal">New Orleans, LA<o:p></o:p></p>
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<p class="MsoNormal"><img border="0" id="_x0000_i1026" src="http://portal.mxlogic.com/images/transparent.gif"><span style="font-size:7.5pt;font-family:"Euphemia","sans-serif";color:white">ᐧ</span><o:p></o:p></p>
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