<div dir="ltr">Hi William - <div><br></div><div>In this case, it is helpful to look forward to the 2017 NEC for guidance:</div><div><br></div><div><div><img src="cid:ii_jsklf5rr0" alt="image.png" width="440" height="402"><br></div><div><br></div><div>I believe it's perfectly fine to have multiple inverter breakers in your main.</div><div><br></div><div>August</div><div>Luminalt</div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Feb 25, 2019 at 8:42 AM William Miller <<a href="mailto:william@millersolar.com">william@millersolar.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang="EN-US"><div class="gmail-m_2626614327792885661WordSection1"><p class="MsoNormal"><span style="font-size:12pt;font-family:Verdana,sans-serif">Friends:</span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:Verdana,sans-serif"> </span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:Verdana,sans-serif">I have an NEC code question on an upcoming project. It is a home that has an existing 8 kW ground-mounted grid-tied system. The owner wants to add another 10 kW of grid-tied PV. My question is about 705.12, point of connection. Specifically section (D)(1). That section states: </span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:Verdana,sans-serif"> </span></p><p class="MsoNormal"><i><span style="font-size:12pt;font-family:Verdana,sans-serif">The source interconnection of one or more inverters installed in one system shall be made at a dedicated circuit breaker or fusible disconnecting means.</span></i></p><p class="MsoNormal"><span style="font-size:12pt;font-family:Verdana,sans-serif"> </span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:Verdana,sans-serif">So if there are going to be two inverters on premise, do the outputs have to be aggregated to connect via one circuit breaker? This might be difficult to do as the exiting inverter is connected via a different sub-panel than the one that is planned to receive the new inverter output.</span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:Verdana,sans-serif"> </span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:Verdana,sans-serif">This <a href="https://iaeimagazine.org/magazine/2014/01/16/load-side-pv-connections/" target="_blank">article</a> addresses the question.</span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:Verdana,sans-serif"> </span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:Verdana,sans-serif">I would be very grateful if any of you can share any experience you might have in interpreting this section of the code.</span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:Verdana,sans-serif"> </span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:Verdana,sans-serif">Thanks in advance.</span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:Verdana,sans-serif"> </span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:Verdana,sans-serif">William</span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:Verdana,sans-serif"> </span></p></div></div>
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