<div dir="ltr">G'Day Mark,<div><br></div><div>Which grid tied inverter are you attempting to AC couple with. I apologize if you already called it out in the thread.</div><div><br></div><div>Christopher</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jun 12, 2020 at 2:01 PM Jay <<a href="mailto:jay.peltz@gmail.com">jay.peltz@gmail.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 dir="auto"><div dir="ltr">Hi Mark, </div><div dir="ltr"><br></div><div dir="ltr">Agreed that diversion is the way to go. </div><div dir="ltr">As 4v above absorb volts is completely unworkable. </div><div dir="ltr"><br></div><div dir="ltr"> But I\u2019m not sure that I agree about .5 hz will do anything. The new rule 21 inverters go off line at 64 hz. And there is a type of tapering based on hz shift, but it won\u2019t shut off a new gt inverter at+ .5hz. </div><div dir="ltr"><br></div><div dir="ltr">Cheers</div><div dir="ltr"><br></div><div dir="ltr">Jay</div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br><blockquote type="cite">On Jun 12, 2020, at 10:08 AM, Mark Frye <<a href="mailto:markf@berkeleysolar.com" target="_blank">markf@berkeleysolar.com</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">\ufeff
<p>Thanks Jay,</p>
<p>I talked again with Magnum.<br>
</p>
<p>I have the latest Rev 6.1 MS-PAE 4448 so the exact implementation
has changed from that described in AN002, 5/10. The current Rev.
has changes designed to improve interaction with the GT inverters.
I didn't really get to the bottom of that. But the critical aspect
of this remains unchanged:<br>
</p>
<p>- the Magnum will have shifted the frequency <down now> by
0.5 Hz <sufficient to knock the GT inverters off-line> when
the DC voltage rises to Absorb + 4V.<br>
</p>
<p>This makes more sense than the 6V I had in my notes (which may
have meant 6V above Float.)</p>
<p>With all this in mind, I think I will plan on using this feature
as a backup to an AC dump load controller set to maintain Float
voltage.<br>
</p>
<p><br>
</p>
<div>On 6/12/2020 7:12 AM, Jay wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hi Mark</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">I found this which might be of help. </div>
<div dir="ltr"><br>
</div>
<div dir="ltr"><a href="https://www.magnum-dimensions.com/sites/default/files/MagArchive/AN-0002-AC-Coupling-Rev-5-10.pdf" target="_blank">https://www.magnum-dimensions.com/sites/default/files/MagArchive/AN-0002-AC-Coupling-Rev-5-10.pdf</a></div>
<div dir="ltr"><br>
</div>
<div dir="ltr">Jay</div>
<div dir="ltr">Peltz power. </div>
<div dir="ltr"><br>
<blockquote type="cite">On Jun 12, 2020, at 6:59 AM, Mark Frye
<a href="mailto:markf@berkeleysolar.com" target="_blank"><markf@berkeleysolar.com></a> wrote:<br>
<br>
</blockquote>
</div>
<blockquote type="cite">
<div dir="ltr">\ufeff<span>Looking for confirmation from Wrenches who
know Magnum inverters:</span><br>
<span></span><br>
<span>- MS-PAE</span><br>
<span></span><br>
<span>-ME-RC</span><br>
<span></span><br>
<span>- Frequency shift enabled (battery type "Custom")</span><br>
<span></span><br>
<span>- AC coupled PV inverters w/o frequency shift capability</span><br>
<span></span><br>
<span>Function:</span><br>
<span></span><br>
<span>At Absorb voltage frequency shift is zero, at Absorb
voltage + 6 V, shift is 0.5 Hz <grid ties pushed
off-line> (in 0.3 volt increments)</span><br>
<span></span><br>
<span>This is from my notes from a tech support call, but I am
wondering if I have it mixed up. Protecting at 6 volts above
the Absorb seems a bit high.</span><br>
<span></span><br>
<span>Thanks,</span><br>
<span></span><br>
<span>Mark</span><br>
<span></span><br>
<span></span><br>
<span>_______________________________________________</span><br>
<span>List sponsored by Redwood Alliance</span><br>
<span></span><br>
<span>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank">RE-wrenches@lists.re-wrenches.org</a></span><br>
<span></span><br>
<span>Change listserver email address & settings:</span><br>
<span><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a></span><br>
<span></span><br>
<span>List-Archive:
<a href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html" target="_blank">http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html</a></span><br>
<span></span><br>
<span>List rules & etiquette:</span><br>
<span><a href="http://www.re-wrenches.org/etiquette.htm" target="_blank">www.re-wrenches.org/etiquette.htm</a></span><br>
<span></span><br>
<span>Check out or update participant bios:</span><br>
<span><a href="http://www.members.re-wrenches.org" target="_blank">www.members.re-wrenches.org</a></span><br>
<span></span><br>
</div>
</blockquote>
<br>
<fieldset></fieldset>
<pre>_______________________________________________
List sponsored by Redwood Alliance
List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank">RE-wrenches@lists.re-wrenches.org</a>
Change listserver email address & settings:
<a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a>
List-Archive: <a href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html" target="_blank">http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html</a>
List rules & etiquette:
<a href="http://www.re-wrenches.org/etiquette.htm" target="_blank">www.re-wrenches.org/etiquette.htm</a>
Check out or update participant bios:
<a href="http://www.members.re-wrenches.org" target="_blank">www.members.re-wrenches.org</a>
</pre>
</blockquote>
<span>_______________________________________________</span><br><span>List sponsored by Redwood Alliance</span><br><span></span><br><span>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank">RE-wrenches@lists.re-wrenches.org</a></span><br><span></span><br><span>Change listserver email address & settings:</span><br><span><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a></span><br><span></span><br><span>List-Archive: <a href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html" target="_blank">http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html</a></span><br><span></span><br><span>List rules & etiquette:</span><br><span><a href="http://www.re-wrenches.org/etiquette.htm" target="_blank">www.re-wrenches.org/etiquette.htm</a></span><br><span></span><br><span>Check out or update participant bios:</span><br><span><a href="http://www.members.re-wrenches.org" target="_blank">www.members.re-wrenches.org</a></span><br><span></span><br></div></blockquote></div>_______________________________________________<br>
List sponsored by Redwood Alliance<br>
<br>
List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank">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" rel="noreferrer" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br>
<br>
List-Archive: <a href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html" rel="noreferrer" target="_blank">http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html</a><br>
<br>
List rules & etiquette:<br>
<a href="http://www.re-wrenches.org/etiquette.htm" rel="noreferrer" target="_blank">www.re-wrenches.org/etiquette.htm</a><br>
<br>
Check out or update participant bios:<br>
<a href="http://www.members.re-wrenches.org" rel="noreferrer" target="_blank">www.members.re-wrenches.org</a><br>
<br>
</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><p style="text-align:center"><span style="font-size:10pt;color:rgb(31,73,125)"><font face="Arial, sans-serif">Chris Schaefer\u2019s<br></font></span><a href="http:www.solarandwindfx.com" style="font-size:12.8px" target="_blank"><img src="http://www.solarandwindfx.com/wp-content/uploads/2015/01/Solar-Wind-FX-Logo.png" width="200" height="40" style="color: rgb(31, 73, 125); font-family: Arial, sans-serif; font-size: 10pt;"></a><br><i><span style="font-family:Arial,sans-serif;color:rgb(31,73,125)"><span style="font-size:9pt">Tel/Fax
585-229-2083 or Cell 585-748-1870 </span><span style="font-size:12px"><br></span></span></i><i style="font-size:12.8px"><span style="font-size:10pt"><font color="#1f497d"><font face="Arial, sans-serif">5115
South Hill Road ~ Canandaigua New York 14424<br></font></font></span></i><i style="font-size:12.8px"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(31,73,125)"><a href="http://www.solarandwindfx.com" target="_blank"><span style="color:blue">www.solarandwindfx.com</span></a> ~ E-mail: <span style="color:blue"><a href="mailto:chris@solarandwindfx.com" target="_blank">chris@solarandwindfx.com</a></span></span></i></p><p style="text-align:center"><i><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(31,73,125)"><img src="http://solarandwindfx.com/wp-content/uploads/2015/01/certs.jpg" width="200" height="56"><br></span></i></p>
<p style="text-align:center"><span style="font-size:10pt;font-family:Arial,sans-serif;color:black">Thomas Jefferson,
the author of our great Constitution, once said, "democracy" will
cease to exist when you take away from those who are willing to work and give
to those who would not."</span><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(31,73,125)"></span></p></div></div></div></div></div></div>