Dan from Exeltech gave a really good explanation of how an inverter can actually start using power ( not loads) at a voltage well below the LBCO.
It could also be a bad battery. Jay Peltz power. > On May 30, 2016, at 9:35 PM, Aaron Mandelkorn <reoso...@gmail.com> wrote: > > 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 > www.offgriddepot.biz > 970-596-3744 > 719-221-5249 > reoso...@gmail.com > > > >> On May 30, 2016 8:43 PM, "Dan Fink" <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 >> >> >> >>> On Mon, May 30, 2016 at 5:59 PM, Aaron Mandelkorn <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 >>> www.offgriddepot.biz >>> 970-596-3744 >>> 719-221-5249 >>> reoso...@gmail.com >>> >>> >>> >>> >>> _______________________________________________ >>> List sponsored by Redwood Alliance >>> >>> List Address: 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 >>> >>> Check out or update participant bios: >>> www.members.re-wrenches.org >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: 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 >> >> Check out or update participant bios: >> www.members.re-wrenches.org > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: 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 > > Check out or update participant bios: > www.members.re-wrenches.org >
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