Thank you all for the ideas and suggestions. This person in particular had #4 wire for the battery connections, so they are all getting replaced with anyway. So it seems like rewiring to a busbar with fuses will be the way to go. And although not ideal to have so many strings, this will be more cost effective than just getting a whole new battery bank right off the bat when they have 10 batteries that have essentially never been used.
Cheers, Dave *--* *Dave Tedeyan* *Senior Engineer* *Taitem Engineering, PC* 10 Verizon Lane, Lansing, NY 14882 Voice: (607) 930-3481 x6 www.taitem.com On Mon, Jul 23, 2018 at 8:50 PM, Glenn Burt <glenn.b...@glbcc.com> wrote: > Hi Christopher, > > > > I buy my copper buss material from McMaster Carr in appropriate dimensions > for the current I am expecting. > > I then cut it to the lengths I need, drill for appropriate size fasteners > and use 2 layers of heat-shrink tubing to protect the exposed bar. > > > > Hope this helps. > > -Glenn > > > > *From:* RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> *On > Behalf Of *Chris Schaefer > *Sent:* Monday, July 23, 2018 2:28 PM > *To:* RE-wrenches <re-wrenches@lists.re-wrenches.org> > *Subject:* Re: [RE-wrenches] 5 battery strings > > > > What source are you all using for buss bars for these multiple battery > string set ups? > > > > Christopher > > > > On Mon, Jul 23, 2018 at 2:16 PM, <t...@wagonmaker.com> wrote: > > Separate out the individual series strings and run each string to a buss > bar setup. Remember it isn't just resistance differences between batteries > but resistance difference between cells as well. In a setup like the > existing one the resistance differences can really add up and if one > battery fails the entire system will be offline. Running each string to a > positive and negative common buss bar means you can remove individual > strings without disrupting the entire storage and the system can continue > operating. Also, it means the only resistance issues of substance are > within individual series pairs not the entire interconnected bank. > > I ran 10 series pairs of 12v AGM batteries, each pair to a common buss and > it was the longest lasting, most stable battery bank I had. That was years > ago and now it would require fusing each string but for longevity and > stability it is the best bet. > > Tom > > On 2018-07-23 03:56, Dave Tedeyan 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 [1] > > Links: > ------ > [1] http://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 > > > > > > -- > > Chris Schaefer’s > <http://www.solarandwindfx.com> > > *Tel/Fax 585-229-2083 or Cell 585-748-1870 * > *5115 South Hill Road ~ Canandaigua New York 14424www.solarandwindfx.com > <http://www.solarandwindfx.com> ~ E-mail: **ch...@solarandwindfx.com > <ch...@solarandwindfx.com>* > > Thomas Jefferson, the author of our great Constitution, once said, > "democracy" will cease to exist when you take away from those who are > willing to work and give to those who would not." > > _______________________________________________ > 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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