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<p class="MsoNormal"><span style="font-size:16.0pt">Hi All<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:16.0pt">On OutBack inverters the EQ process is not temp comped.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:16.0pt">The eq timer will not count down until the voltage set point is achieved.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:16.0pt">You comment on the issue being somewhat intermittent is interesting.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:16.0pt">Could there be a loose cable, bad crimp or corroded connection somewhere in the system?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:16.0pt">Sorry but nothing jumps out at me.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:16.0pt">Someone mentioned specific gravity.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:16.0pt">Are the SG readings widely separated?<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> RE-wrenches <re-wrenches-bounces@lists.re-wrenches.org>
<b>On Behalf Of </b>Dave Tedeyan<br>
<b>Sent:</b> Tuesday, April 28, 2020 8:17 AM<br>
<b>To:</b> offgridsolar@sti.net; RE-wrenches <re-wrenches@lists.re-wrenches.org><br>
<b>Subject:</b> Re: [RE-wrenches] Outback EQ not holding voltage<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Brian, <o:p></o:p></p>
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<p class="MsoNormal">I had tried lowering the EQ voltage by 0.4V. The batteries still get up to the EQ voltage, but then fluctuate right at or 0.1V below. <o:p></o:p></p>
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<p class="MsoNormal">Dave, <o:p></o:p></p>
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<p class="MsoNormal">The EQ countdown timer does not count down when the battery voltage is below the EQ setpoint (even if by 0.1V). And since the timer never gets to 0, the system just stays in EQ.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Also, we have found that the issue is somewhat intermittent. At one point Outback had me reset the CC and FNDC back to factory settings and reprogram them. It seemed that it helped, but then a month or two later it showed the same issue.
So this does not happen with every EQ cycle, it just happens for most of them. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I also received another suggestion that the battery bank has a couple bad cells which will lead to higher temps and so with the temperature compensation the bank is just not getting to a high enough voltage. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Cheers, <o:p></o:p></p>
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<p class="MsoNormal">Dave<o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-family:"Tahoma",sans-serif">Dave Tedeyan, PE</span></b><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">Senior Engineer | Taitem Engineering, PC</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif"><img width="142" height="80" style="width:1.4791in;height:.8333in" id="_x0000_i1026" src="https://www.taitem.com/signatures/logo.png"></span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">110 South Albany Street | Ithaca, NY 14850</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">o. <u>607.277.1118 x121</u> f. 607.277.2119</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">Solar \u2022</span><span style="font-size:12.5pt;font-family:"Tahoma",sans-serif"> </span><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">Sustainability \u2022 Energy \u2022 Design</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">Certified B-Corporation since 2013</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Tue, Apr 28, 2020 at 11:08 AM Dave Angelini Offgrid Solar <<a href="mailto:offgridsolar@sti.net">offgridsolar@sti.net</a>> wrote:<o:p></o:p></p>
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<p>Does not sound right to me. Usually both Outback and Schneider protect against uncontrolled EQ time and end EQ.<o:p></o:p></p>
<p>I think I would remove the network after the battery is full and test one controller at a time. Might have been damaged by lightning or gen glitching. Since you say it does this from the inverter charger on genset (only no fm80's) is even weirder. Eliminate
the network.<o:p></o:p></p>
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<pre><strong><span style="font-size:12.0pt;font-family:"Courier New"">Dave Angelini Offgrid Solar<o:p></o:p></span></strong></pre>
<pre><strong><span style="font-size:12.0pt;font-family:"Courier New"">"we go where powerlines don't"<o:p></o:p></span></strong></pre>
<pre><strong><span style="font-size:12.0pt;font-family:"Courier New""><a href="https://protect2.fireeye.com/v1/url?k=cee1a1a4-92739677-cee2a82f-0025908791f8-9b7d5f72ebfbfdd2&q=1&e=7bfbb7f8-a424-4770-a18d-9f7142695ecc&u=http%3A%2F%2Fmembers.sti.net%2Foffgridsolar%2F" target="_blank">http://members.sti.net/offgridsolar/</a><o:p></o:p></span></strong></pre>
<pre><strong><span style="font-size:12.0pt;font-family:"Courier New"">e-mail <a href="mailto:offgridsolar@sti.net" target="_blank">offgridsolar@sti.net</a><o:p></o:p></span></strong></pre>
<pre><strong><span style="font-size:12.0pt;font-family:"Courier New"">text 209 813 0060</span></strong><o:p></o:p></pre>
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<p>On Tue, 28 Apr 2020 07:00:21 -0700, Brian Mehalic <<a href="mailto:brian@solarenergy.org" target="_blank">brian@solarenergy.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Sorry you had already answered the first two questions :) What about the others?<o:p></o:p></p>
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<p class="MsoNormal">Brian<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">On Apr 28, 2020, at 6:50 AM, Dave Tedeyan <<a href="mailto:dtedeyan@taitem.com" target="_blank">dtedeyan@taitem.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Hi All, <o:p></o:p></p>
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<p class="MsoNormal">I've got an outback system (Radian 8048A, 2 FM80, 16 Trojan L16RE-B) where when the customer equalizes, the batteries hover right around the EQ voltage, but will often dip to 0.1v less. Because of this, the EQ timer does not count down
properly, and so left to its own devices the system would equalize for way longer than it should, potentially forever. This will happen when doing an EQ from the solar on a bright sunny day, or the generator, or both. The customer can manually keep track of
the time and manually stop the EQ after 3 hours, but that is not ideal. Has anyone dealt with this before and have any suggestions on how they fixed it? <o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">This system is 3-4 years old, and the issue only started in the past year or so.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Cheers, <o:p></o:p></p>
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<p class="MsoNormal">Dave<o:p></o:p></p>
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<p class="MsoNormal"><strong><span style="font-family:"Tahoma",sans-serif">Dave Tedeyan, PE</span></strong><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">Senior Engineer | Taitem Engineering, PC</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">110 South Albany Street | Ithaca, NY 14850</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">o. <u>607.277.1118 x121</u> f. 607.277.2119</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">Solar \u2022</span><span style="font-size:12.5pt;font-family:"Tahoma",sans-serif"> </span><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">Sustainability \u2022 Energy \u2022 Design</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">Certified B-Corporation since 2013</span><o:p></o:p></p>
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