Number 4 wire is definitely a problem if it’s anywhere near normal battery voltage
And if the batteries have essentially never been used you gotta wonder if they’re going to be any good anyway? Or did I miss something ? Bob Ellison > On Jul 24, 2018, at 9:40 AM, Dave Tedeyan <dtede...@taitem.com> wrote: > > 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 >> >> Tel/Fax 585-229-2083 or Cell 585-748-1870 >> 5115 South Hill Road ~ Canandaigua New York 14424 >> www.solarandwindfx.com ~ E-mail: 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 >> >> > > _______________________________________________ > 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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