<div dir="auto"><div>Wrenches<div dir="auto">Looks like the i verter is doing what it should 269 is out of range, what is the at meter voltage, libe loss or very high output voltage, 41 volts increase looks like resistance issues. More info would help, distance, wire size etc.</div><div dir="auto">Jerry</div><div dir="auto">Jerry</div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, May 20, 2021, 9:52 AM James Reismiller <<a href="mailto:james@abundantsolar.com">james@abundantsolar.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<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="m_-3428744689048674233MsoListParagraph" 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="m_-3428744689048674233MsoListParagraph" 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="m_-3428744689048674233MsoListParagraph" 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="m_-3428744689048674233MsoListParagraph" 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:1.0in;height:.677in" id="m_-3428744689048674233Picture_x0020_1" src="cid:image002.png@01D74D5D.CA065970"><u></u><u></u></p>
<p class="MsoNormal"><a href="http://www.abundantsolar.com/abundantsolar/Home.html" target="_blank" rel="noreferrer"><span style="color:#0563c1">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:10.0pt;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>
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