I would at least rewire them like this... [image: image.png] Remember all the parallel strings take offs must be the same size/length, otherwise you are going to exacerbate imbalance issues.
<http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> Steve Higgins ⋅ Technical Services Manager t +1.902.597.4020 m +1.206.790.5840 f +1.902.597.8447 e st...@surrette.com <javascript:void(0);> <http://www.facebook.com/RollsBattery> <http://www.facebook.com/RollsBattery> <http://www.twitter.com/RollsBattery> <https://www.youtube.com/user/RollsBattery> <https://www.linkedin.com/company/rolls-battery-engineering> <http://www.instagram.com/RollsBattery> <http://www.instagram.com/RollsBattery> <http://www.instagram.com/RollsBattery> ------------------------------ CONFIDENTIALITY: The information transmitted herein is intended only for the addressee and may contain confidential, proprietary and/or privileged material. Any unauthorized review, distribution or other use of or the taking of any action in reliance upon this information is prohibited. If you receive this email in error, please contact the sender and delete or destroy this message and all copies. ------------------------------ On Mon, Jul 23, 2018 at 7:24 AM Jerry Shafer <jerrysgarag...@gmail.com> wrote: > Dave > Its a good idea to think of batteries the same way you do PV Modules. Any > time you have more then two strings they get individual fuse protection, > this is also good for diagnoses purpuses too. > The current installation has no protection, safety and l would change it. > As far as operation goes it works but thats not a exceptable reason to > leave it that way is. > Jerry > > > On Mon, Jul 23, 2018, 6:56 AM Dave Tedeyan <dtede...@taitem.com> wrote: > >> Since we are on the topic of bad battery practices... >> >> I may be fixing up a system that was both designed and installed very >> poorly. >> They have a 24V Outback VFXR inverter, and ten 12V AGM batteries wired >> into >> 5 parallel strings. I know that is a bad idea, but since they already >> have the >> equipment, are there any safety issues by re-using this equipment? It is >> for a >> grid tie battery backup system that will remain in float most of the >> time. I assume >> that the batteries will not last particularly long, but is there any harm >> in using them >> and then just getting new batteries once they fail? >> >> Stringing is shown in the attached picture. >> Cheers, >> Dave >> >> >> *--* >> >> >> *Dave Tedeyan* >> *Senior Engineer* >> >> *Taitem Engineering, PC* >> 10 Verizon Lane, Lansing, NY 14882 >> Voice: (607) 930-3481 x6 >> www.taitem.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 > >
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