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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple style='margin-bottom:33.75pt'><div class=WordSection1><p class=MsoNormal>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></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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></p><p class=MsoNormal>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></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>-Glenn<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> RE-wrenches <re-wrenches-bounces@lists.re-wrenches.org> <b>On Behalf Of </b>glenn.burt@glbcc.com<br><b>Sent:</b> Sunday, September 23, 2018 6:58 AM<br><b>To:</b> Mac Lewis <maclewis1@gmail.com>; RE-wrenches <re-wrenches@lists.re-wrenches.org><br><b>Subject:</b> Re: [RE-wrenches] Ham Radio interference<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><span style='font-size:10.0pt'>Hi Mac,<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p></div><div><p class=MsoNormal><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></p></div><div><p class=MsoNormal><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></p></div><div><p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt'>Good luck.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt'>Glenn<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p></div><div><div><p class=MsoNormal><span style='font-size:10.0pt'>Sent from my 'smart' phone so please excuse spelling and typos.<o:p></o:p></span></p></div></div></div><div><div id=LGEmailHeader><div><p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt'>------ Original message------<o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='font-size:10.0pt'>From: </span></b><span style='font-size:10.0pt'>Mac Lewis<o:p></o:p></span></p></div><div><p class=MsoNormal><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></p></div><div><p class=MsoNormal><b><span style='font-size:10.0pt'>To: </span></b><span style='font-size:10.0pt'>RE-wrenches;<o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='font-size:10.0pt'>Cc: </span></b><span style='font-size:10.0pt'><o:p></o:p></span></p></div><div><p class=MsoNormal><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></p></div><div><p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p></div></div><div><p class=MsoNormal><span style='font-size:10.0pt'>Hi Wrenches,<o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p></div><div><p class=MsoNormal><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></p></div><div><p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p></div><div><p class=MsoNormal><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></p></div><div><p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt'>Thanks<br clear=all><o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p></div><p class=MsoNormal><span style='font-size:10.0pt'>-- <o:p></o:p></span></p><div><div><p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p></div><p class=MsoNormal style='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></p><p><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></p></div></div></div></div></div></body></html>