<p dir="ltr">Thank you everyone for your input. I am quite sure this controller was just doing what it was supposed to do. The inverter disconnected from low voltage and the solar modules were covered with snow for months. The classic was trying to reconnect all this time and I believe acted as a load on the batteries. Essentially the classic brought the system down but poor design and actions by the customer are what led to this disaster. I will be pulling the batteries and changing/ load testing at the shop. Hopefully we didn't destroy this battery bank. </p>
<p dir="ltr">Aaron Mandelkorn<br>
Owner/Solar Specialist<br>
Renewable Energy Outfitters<br>
<a href="http://www.reosolar.com">www.reosolar.com</a><br>
<a href="http://www.offgriddepot.biz">www.offgriddepot.biz</a><br>
<a href="tel:970-596-3744">970-596-3744</a><br>
<a href="tel:719-221-5249">719-221-5249</a><br>
<a href="mailto:reosolar@gmail.com">reosolar@gmail.com</a></p>
<p dir="ltr"> </p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Hi Aaron,
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">A customer of mine had a very similar situation happen couple years ago, except with the added fun of frozen batteries, split open
and a resulting mess. (system was installed by others without a proper battery box / spill containment).
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">This fault was traced back to a failed MX60 controller that was not only preventing solar input, but had a small parasitic load on
the system that was enough to discharge the batteries. Replaced controller, new batteries (with spill containment!) and the system has been fine since.
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Kevin<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> RE-wrenches [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>]
<b>On Behalf Of </b>Aaron Mandelkorn<br>
<b>Sent:</b> May-30-16 9:35 PM<br>
<b>To:</b> RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>><br>
<b>Subject:</b> Re: [RE-wrenches] Fried Classic150?<u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p>The more I think about this the stranger it seems. All system breakers were left on before leaving for the winter. Inverter was also on to power two small AC fans. How can a 48 volt battery bank get so discharged to the point of almost complete depletion
(13.7 volts). The inverter low battery cutout was programmed to 48.1v and there are no DC loads. Isn't the point of lbco to protect against this exact situation? What could have brought this bank down so low? I am wondering if my client may have reset the
lbco and other settings by throwing the inverter breaker by accident. <u></u><u></u></p>
<p>Aaron Mandelkorn<br>
Owner/Solar Specialist<br>
Renewable Energy Outfitters<br>
<a href="http://www.reosolar.com" target="_blank">www.reosolar.com</a><br>
<a href="http://www.offgriddepot.biz" target="_blank">www.offgriddepot.biz</a><br>
<a href="tel:970-596-3744" value="+19705963744" target="_blank">970-596-3744</a><br>
<a href="tel:719-221-5249" value="+17192215249" target="_blank">719-221-5249</a><br>
<a href="mailto:reosolar@gmail.com" target="_blank">reosolar@gmail.com</a><u></u><u></u></p>
<p> <u></u><u></u></p>
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<p class="MsoNormal">On May 30, 2016 8:43 PM, "Dan Fink" <<a href="mailto:danbob88@gmail.com" target="_blank">danbob88@gmail.com</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal">MPPT does need a minimum battery voltage to wake up and start charging, at least 9 volts -- I once arrived at a remote site on a sunny day, the PV input breaker had tripped, batteries were under 9v, no charging despite the sunny weather
until I woke the MPPT up with jumper cables from my truck battery. <u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">Dan Fink</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">Adjunct Professor of Solar Energy Technology, Ecotech Institute<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">IREC Certified Instructor™ for: <u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">~ PV Installation Professional<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">~ Small Wind Installer<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">Executive Director, Buckville Energy<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">NABCEP Registered Continuing Education Providers™<br>
<a href="tel:970.672.4342" target="_blank"><span style="color:#1155cc">970.672.4342</span></a><u></u><u></u></span></p>
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<p class="MsoNormal">On Mon, May 30, 2016 at 5:59 PM, Aaron Mandelkorn <<a href="mailto:reosolar@gmail.com" target="_blank">reosolar@gmail.com</a>> wrote:<u></u><u></u></p>
<blockquote style="border:none;border-left:solid #cccccc 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<p>Hi all. I returned to a off grid site today after having no winter access. It appears as though the classic 150 charge controller has failed. The batteries are completely discharged. The classics screen will flash occasionally as well as a yellow light on
this left front of the controller but wont turn on. Does the classic have a minimum voltage requirement needed to turn on? Has anyone else experienced this? I can't figure out what happened to cause this issue.
<u></u><u></u></p>
<p>Thanks <u></u><u></u></p>
<p><span style="color:#888888">Aaron Mandelkorn<br>
Owner/Solar Specialist<br>
Renewable Energy Outfitters<br>
<a href="http://www.reosolar.com" target="_blank">www.reosolar.com</a><br>
<a href="http://www.offgriddepot.biz" target="_blank">www.offgriddepot.biz</a><br>
<a href="tel:970-596-3744" target="_blank">970-596-3744</a><br>
<a href="tel:719-221-5249" target="_blank">719-221-5249</a><br>
<a href="mailto:reosolar@gmail.com" target="_blank">reosolar@gmail.com</a><u></u><u></u></span></p>
<p><span style="color:#888888"> <u></u><u></u></span></p>
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