<div dir="ltr">Hey James, <div>Line 1 and Line 2 switched in the inverter combiner panel from any of the inverters? ( line 1 connected to line 2 of inverter 2 or 3 or vice versa)?</div><div>Good luck!</div><div><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr">Sunny Regards,<br>Kirpal Khalsa</div><div dir="ltr">Oregon LRT#25<br>Oregon Solarworks LLC<br><a href="http://www.oregonsolarworks.com" target="_blank">www.oregonsolarworks.com</a><br>541-299-0402</div></div></div></div></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, May 20, 2021 at 9:52 AM James Reismiller <<a href="mailto:james@abundantsolar.com">james@abundantsolar.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" style="overflow-wrap: break-word;">
<div class="gmail-m_5126834745908716330WordSection1">
<p class="MsoNormal">Hi Folks,<u></u><u></u></p>
<p class="MsoNormal">I\u2019m wondering if anybody has ideas on what could be causing grid over/undervoltage errors on an install we did about a year ago that now has these issues. The site is a 24 kW DC ground mount array with (3) SMA SB7.0-1SP-US-40 inverters.
I\u2019ve checked and done the following:<u></u><u></u></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="gmail-m_5126834745908716330MsoListParagraph" style="margin-left:0in">Measured voltage min/max at inverter terminals and AC combiner. Min \u2013 228VAC (with no inverter output) Max - 269 VAC (when inverter trying to connect)!<u></u><u></u></li><li class="gmail-m_5126834745908716330MsoListParagraph" style="margin-left:0in">Had utility check service and transformer with load meter (with no PV running). No issues found and utility engineer stated he thinks it\u2019s on our side.
<u></u><u></u></li><li class="gmail-m_5126834745908716330MsoListParagraph" style="margin-left:0in">Checked all AC connections including neutral (seemed like neutral issue) from inverters back to supply-side tap (fused disco).
<u></u><u></u></li><li class="gmail-m_5126834745908716330MsoListParagraph" style="margin-left:0in">Changed SMA upper voltage window in grid guard settings to 272V max and 264V reconnection. This helped for a while but now is faulting again.
<u></u><u></u></li></ol>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Have any of you ran into this issue and how did you solve it? Or what\u2019s the next thing to check?<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Thanks in advance! <u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Be Well,<u></u><u></u></p>
<p class="MsoNormal">James Reismiller<u></u><u></u></p>
<p class="MsoNormal">He/Him/His<u></u><u></u></p>
<p class="MsoNormal"><span style="color:black">NABCEP Certified Solar PV InstallerŽ<u></u><u></u></span></p>
<p class="MsoNormal">Abundant Solar<u></u><u></u></p>
<p class="MsoNormal">541-231-8072 xt. 3<u></u><u></u></p>
<p class="MsoNormal">CCB#175919<u></u><u></u></p>
<p class="MsoNormal"><img width="96" height="65" style="width: 1in; height: 0.677in;" id="gmail-m_5126834745908716330Picture_x0020_1" src="cid:1798ab3cb305b16b21"><u></u><u></u></p>
<p class="MsoNormal"><a href="http://www.abundantsolar.com/abundantsolar/Home.html" target="_blank"><span style="color:rgb(5,99,193)">www.abundantsolar.com</span></a><u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><span style="color:black">"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion to fission. And it just so happens that there's an enormous fusion reactor safely banked a few million miles from us. It delivers more
than we could ever use in just about 8 minutes. And it's wireless!"<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10pt;color:black"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="color:black">~William McDonough <u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
</div>
_______________________________________________<br>
List sponsored by Redwood Alliance<br>
<br>
Pay optional member dues here: <a href="http://re-wrenches.org" rel="noreferrer" target="_blank">http://re-wrenches.org</a><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>
There are two list archives for searching. When one doesn't work, try the other:<br>
<a href="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/" rel="noreferrer" target="_blank">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a><br>
<a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" rel="noreferrer" target="_blank">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" rel="noreferrer" target="_blank">http://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">http://www.members.re-wrenches.org</a><br>
<br>
</blockquote></div>