I too would like to know the make and model of batteries that are loosing capacity. In the past 5 years we have experienced abnormally high failures from 2 brands.
Larry On Jan 15, 2018, at 2:00 PM, Jay <jay.pe...@gmail.com> wrote: Can you tell us: Battery make,model and size? Jay Peltz power. On Jan 15, 2018, at 12:32 PM, Daniel Young <dyo...@dovetailsolar.com <mailto:dyo...@dovetailsolar.com>> wrote: > Hello Wrenches, > > I have a client that is running into an issue with his off grid system. The > system is 3yrs old and they are starting to notice their AGM battery bank is > loosing capacity, in reality they are noticing the generator is triggering > more often. They want to try to lower the frequency of the generator > triggering if possible. > > The system is not occupied during much of the winter (unconditioned, which > further hurts the battery bank capacity), but the client has a security > system with a cell modem installed and always on. This fortunately allows > Optics-RE access, but unfortunately based on the FNDC shunt readings, is > pulling a consistent 150w from the battery bank. Currently the network and > security equipment is powered from standard wall-warts running on AC. > > I’d like to help the client extend the time between generator cycles by > taking the network loads and powering them directly from the battery bank > (the loads are all 12Vdc). Does anyone have any recommendations for a decent > quality DC_DC converter that would be applicable? Given inverter losses and > the efficiency of the typical wall-wart, I’d expect the running loads to be > closer to 80-100w rather than the 150w we see now. The intent is to then take > the inverter into search mode, or even switch it off, to remove the tare > losses there, and also to take all the wasted power from the standard > wall-warts and go to a single, more efficient dc power supply. > > Any recommendations on a good DC_DC converter are appreciated. > > With Regards, > > Daniel Young, > NABCEP Certified PV Installation ProfessionalTM: Cert #031508-90 > Dovetail Solar and Wind > > __________________________ > _______________________________________________ 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 <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 <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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