<html><body><span style="font-family:Verdana; color:#000000; font-size:10pt;"><div>Someone on this group once told me (2003-4?), one of the main reason requiring that all PV Home Runs be installed in metal conduit was to reduce RF interference.. Withing a year or so it was required for other reasons.<br></div><div><br></div><div>db<br></div><div><br>Dan Brown<br>Foxfire Energy Corp.<br>Renewable Energy Systems<br>(802)-483-2564<br><a href="http://www.Foxfire-Energy.com">www.Foxfire-Energy.com</a><br><br></div><div></div><div><br><br></div>
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Subject: Re: [RE-wrenches] Ham Radio interference<br>
From: "Glenn Burt" <<a href="mailto:glenn.burt@glbcc.com">glenn.burt@glbcc.com</a>><br>
Date: Sun, September 23, 2018 6:31 pm<br>
To: "'RE-wrenches'" <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>>, "'Mac Lewis'"<br>
<<a href="mailto:maclewis1@gmail.com">maclewis1@gmail.com</a>><br>
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</style><div class="WordSection1"><div class="MsoNormal" style="font-size:12pt;">I found the issue \u2013 April 2016 edition of QST magazine. It is the cover story and describes a Solar Edge installation and the mitigation experience \u2013 they quoted about 10% of the system installed costs could be expected to be needed to quiet the RF noise created by the PV system. <o:p></o:p></div><div class="MsoNormal" style="font-size:12pt;"><o:p> </o:p></div><div class="MsoNormal" style="font-size:12pt;">I have a modest amateur radio station at my home, and a few modules using M250 microinverters about 20\u2019 away on the side of my detached garage in an awning style. I definitely measure increased RF noise on the ham bands during the daytime when the system is operation \u2013 I just choose to adapt my radio usage around the inconvenience, operating after sundown, or for limited times and bands during the daytime. I am only using 100 Watts of power for my transmitter.<o:p></o:p></div><div class="MsoNormal" style="font-size:12pt;"><o:p> </o:p></div><div class="MsoNormal" style="font-size:12pt;">So that is one of the two possible concerns with PV and amateur radio \u2013 how does a PV system affect the use of a ham radio.<o:p></o:p></div><div class="MsoNormal" style="font-size:12pt;">The other concern is how will a 1500W transmitter in close proximity to a PV system affect the operation of the solar electric system. Unfortunately I have no firsthand experience with this, however I see posts on other groups that indicate poor interaction.<o:p></o:p></div><div class="MsoNormal" style="font-size:12pt;"><o:p> </o:p></div><div class="MsoNormal" style="font-size:12pt;">-Glenn<o:p></o:p></div><div class="MsoNormal" style="font-size:12pt;"><o:p> </o:p></div><div><div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in"><div class="MsoNormal" style="font-size:12pt;"><b>From:</b> RE-wrenches <<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>> <b>On Behalf Of </b><a href="mailto:glenn.burt@glbcc.com">glenn.burt@glbcc.com</a><br><b>Sent:</b> Sunday, September 23, 2018 6:58 AM<br><b>To:</b> Mac Lewis <<a href="mailto:maclewis1@gmail.com">maclewis1@gmail.com</a>>; RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br><b>Subject:</b> Re: [RE-wrenches] Ham Radio interference<o:p></o:p></div></div></div><div class="MsoNormal" style="font-size:12pt;"><o:p> </o:p></div><div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt">Hi Mac,<o:p></o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt"><o:p> </o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt">A while back the magazine QST which is published by the Amateur Radio Relay League had an article written by a ham detailing his experience in quieting a rooftop array. I am pretty sure it was microinverters based.<o:p></o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt">Anyway he ended up with a substantial number of toroidal chokes on most conductors if I recall. Sounded labor intensive and definately not free.<o:p></o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt"><o:p> </o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt">Good luck.<o:p></o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt">Glenn<o:p></o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt"><o:p> </o:p></span></div></div><div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt">Sent from my 'smart' phone so please excuse spelling and typos.<o:p></o:p></span></div></div></div></div><div><div id="LGEmailHeader"><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt"><o:p> </o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt">------ Original message------<o:p></o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><b><span style="font-size:10.0pt">From: </span></b><span style="font-size:10.0pt">Mac Lewis<o:p></o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><b><span style="font-size:10.0pt">Date: </span></b><span style="font-size:10.0pt">Sat, Sep 22, 2018 7:36 PM<o:p></o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><b><span style="font-size:10.0pt">To: </span></b><span style="font-size:10.0pt">RE-wrenches;<o:p></o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><b><span style="font-size:10.0pt">Cc: </span></b><span style="font-size:10.0pt"><o:p></o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><b><span style="font-size:10.0pt">Subject:</span></b><span style="font-size:10.0pt">[RE-wrenches] Ham Radio interference<o:p></o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt"><o:p> </o:p></span></div></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt">Hi Wrenches,<o:p></o:p></span></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt"><o:p> </o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt">I've got a proposal out there for about a 11.5 kW grid-tied system. We are planning on using Enphase IQ 7+ inverters. Quick question, this guy has a pretty large Ham Radio setup operating at 3-30 MHz. He has a directional antennae that can push 1500W sometimes. Has anyone had any issues with Ham radio problems with these inverters? With either the radio setup or the inverter?<o:p></o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt"><o:p> </o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt">He asked me if it would be an issue and I told him I'd look into it. I will contact enphase as well.<o:p></o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt"><o:p> </o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt">Thanks<br clear="all"><o:p></o:p></span></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt"><o:p> </o:p></span></div></div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt">-- <o:p></o:p></span></div><div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt"><o:p> </o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt"><o:p> </o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size:10.0pt"><o:p> </o:p></span></div></div><div class="MsoNormal" style="font-size:12pt;margin-bottom:12.0pt"><span style="font-size:10.0pt">Mac Lewis</span><b><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#FF9900"><o:p></o:p></span></b></div><div><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#305A78">"Yo solo sé que no sé nada." </span><b><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#686868">-Sócrates</span></b><b><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#FF9900"><o:p></o:p></span></b></div></div></div></div></div></div><hr>_______________________________________________<br>
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