<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr">Hi drake</div><div dir="ltr"><br></div><div dir="ltr">I did a small enphase system with my 3524vfx some years ago. It was 3 M190\u2019s. </div><div dir="ltr"><br></div><div dir="ltr">It had the same issues. Mostly it appeared during when the loads vs AC production were at a specific level</div><div dir="ltr"><br></div><div dir="ltr">If the AC was high and loads low, it was fine. </div><div dir="ltr">If the ac low and loads high no issue </div><div dir="ltr"><br></div><div dir="ltr">But if they were close then I\u2019d get the pulsing you are talking about. </div><div dir="ltr">I don\u2019t have a scope, best guess is its harmonics. </div><div dir="ltr"><br></div><div dir="ltr">I didn\u2019t like the pulsing and thought that it\u2019s bad for compressors, lights, etc so I stopped using it. </div><div dir="ltr"><br></div><div dir="ltr">I don\u2019t know if is something specific to older vfx units or emphase or?</div><div dir="ltr"><br></div><div dir="ltr">I would take it off line</div><div dir="ltr"><br></div><div dir="ltr">Jay</div><div dir="ltr">Peltz power. </div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br><blockquote type="cite">On Aug 25, 2020, at 8:34 AM, drake.chamberlin@redwoodalliance.org wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">\ufeff<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<p>The inverter is set to ON not to SEARCH. If the Enphase circuit is switched off, the pulsing stops immediately. This system has both AC and DC coupling. </p>
<p>In another location, with a Sunny Boy AC coupled with a pair of stacked VFX3524 inverters, there is some pulsing in low light conditions. The Radian and Enphase combo is much more noticeable.</p>
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<p id="reply-intro">On 2020-08-25 10:42, Jerry Shafer wrote:</p>
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<div dir="auto">Wrenches
<div dir="auto">I would think that in time there might be damage. Check to make sure the inverter is not on search but I stead "ON", next if you turn off the enphase the the outback perform normally. Check the inverter frequency to see your frequency is shifting have one that has both AC & DC Coupling and no issues.</div>
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<div class="v1gmail_attr" dir="ltr">On Tue, Aug 25, 2020, 6:37 AM <<a href="mailto:drake.chamberlin@redwoodalliance.org" rel="noreferrer">drake.chamberlin@redwoodalliance.org</a>> wrote:</div>
<blockquote class="v1gmail_quote" style="margin: 0 0 0 .8ex; border-left: 1px #ccc solid; padding-left: 1ex;">Hello Wrenches,<br><br>An AC coupled arrangement, with an 8 kW Radian and 8 Enphase <br>microinverters, pulses lighting at low levels of array illumination. <br>This is generally not too much of a problem.<br><br>Under certain levels of solar isolation, the pulsing becomes extreme and <br>causes the motors in the refrigerator and air-conditioner to pulse, <br>sometimes causing very audible vibrations.<br><br>Will this harm the appliances? Is there anything that can be done to <br>moderate or stop the pulsing?<br><br>Thank you,<br><br>Drake<br>Athens Electric LLC<br><br>-- <br>_______________________________________________<br>List sponsored by Redwood Alliance<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" rel="noreferrer">RE-wrenches@lists.re-wrenches.org</a><br><br>Change listserver email address & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank" rel="noopener noreferrer">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>List-Archive: <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" target="_blank" rel="noopener noreferrer">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br><br>List rules & etiquette:<br><a href="http://www.re-wrenches.org/etiquette.htm" target="_blank" rel="noopener noreferrer">www.re-wrenches.org/etiquette.htm</a><br><br>Check out or update participant bios:<br><a href="http://www.members.re-wrenches.org" target="_blank" rel="noopener noreferrer">www.members.re-wrenches.org</a><br><br></blockquote>
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