Hi Aaron, 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).
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. Kevin From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Aaron Mandelkorn Sent: May-30-16 9:35 PM To: RE-wrenches <re-wrenches@lists.re-wrenches.org> Subject: Re: [RE-wrenches] Fried Classic150? 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. Aaron Mandelkorn Owner/Solar Specialist Renewable Energy Outfitters www.reosolar.com<http://www.reosolar.com> www.offgriddepot.biz<http://www.offgriddepot.biz> 970-596-3744 719-221-5249 reoso...@gmail.com<mailto:reoso...@gmail.com> On May 30, 2016 8:43 PM, "Dan Fink" <danbo...@gmail.com<mailto:danbo...@gmail.com>> wrote: 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. Dan Fink Adjunct Professor of Solar Energy Technology, Ecotech Institute IREC Certified Instructor™ for: ~ PV Installation Professional ~ Small Wind Installer Executive Director, Buckville Energy NABCEP Registered Continuing Education Providers™ 970.672.4342<tel:970.672.4342> On Mon, May 30, 2016 at 5:59 PM, Aaron Mandelkorn <reoso...@gmail.com<mailto:reoso...@gmail.com>> wrote: 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. Thanks Aaron Mandelkorn Owner/Solar Specialist Renewable Energy Outfitters www.reosolar.com<http://www.reosolar.com> www.offgriddepot.biz<http://www.offgriddepot.biz> 970-596-3744<tel:970-596-3744> 719-221-5249<tel:719-221-5249> reoso...@gmail.com<mailto:reoso...@gmail.com> _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org<mailto:RE-wrenches@lists.re-wrenches.org> Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm<http://www.re-wrenches.org/etiquette.htm> Check out or update participant bios: www.members.re-wrenches.org<http://www.members.re-wrenches.org> _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org<mailto:RE-wrenches@lists.re-wrenches.org> Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm<http://www.re-wrenches.org/etiquette.htm> Check out or update participant bios: www.members.re-wrenches.org<http://www.members.re-wrenches.org>
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