<HTML><HEAD></HEAD>
<BODY dir=ltr>
<DIV dir=ltr>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'Calibri'; COLOR: #000000">
<DIV>This was 22 years ago and I got my buss bars from a battery distributor who
did large backup installations for telco systems. He was horrified
that we in the business were paralleling series strings together in a daisy
chain. Said it was the best way to give batteries an early death. I
had a source but last time I posted it I was told it was no longer in
business. But I would think anyone who installs systems for large battery
backups, either for wind systems using containers full of batteries or telco
backup power, would have access to a good source. I preferred tinned
copper bars.</DIV>
<DIV> </DIV>
<DIV>Using buss bars allows for creating banks of lots of batteries which allows
for redundancy. I\u2019ve never understood why you would want to put all your
eggs in one or two baskets, so to speak, by paralleling two series strings of
large batteries. One cell in one battery failing kills half the storage
right off the bat and the system has to be taken offline just to remove the
defective string. With a buss bar there is no interruption of service,
batteries can be swapped out easily while the system hums along. My AGMs
were solid for years and very well balanced.</DIV>
<DIV> </DIV>
<DIV>Tom </DIV>
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV style="FONT: 10pt tahoma">
<DIV> </DIV>
<DIV style="BACKGROUND: #f5f5f5">
<DIV style="font-color: black"><B>From:</B> <A
title=chris@solarandwindfx.com>Chris Schaefer</A> </DIV>
<DIV><B>Sent:</B> Monday, July 23, 2018 8:28 AM</DIV>
<DIV><B>To:</B> <A title=re-wrenches@lists.re-wrenches.org>RE-wrenches</A>
</DIV>
<DIV><B>Subject:</B> Re: [RE-wrenches] 5 battery strings</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV dir=ltr>What source are you all using for buss bars for these multiple
battery string set ups?
<DIV> </DIV>
<DIV>Christopher</DIV></DIV>
<DIV class=gmail_extra>
<DIV> </DIV>
<DIV class=gmail_quote>On Mon, Jul 23, 2018 at 2:16 PM, <SPAN dir=ltr><<A
target=_blank>tom@wagonmaker.com</A>></SPAN> wrote:<BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex">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.<BR><BR>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.<BR><BR>Tom<SPAN><BR><BR>On 2018-07-23 03:56,
Dave Tedeyan wrote:<BR></SPAN>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex"><SPAN>Since
we are on the topic of bad battery practices...<BR><BR>I may be fixing up a
system that was both designed and installed very<BR>poorly.<BR>They have a
24V Outback VFXR inverter, and ten 12V AGM batteries wired<BR>into<BR>5
parallel strings. I know that is a bad idea, but since they already<BR>have
the<BR>equipment, are there any safety issues by re-using this equipment?
It<BR>is for a<BR>grid tie battery backup system that will remain in float
most of the<BR>time. I assume<BR>that the batteries will not last
particularly long, but is there any<BR>harm in using them<BR>and then just
getting new batteries once they fail?<BR><BR>Stringing is shown in the
attached picture.<BR>Cheers,<BR>Dave<BR><BR>--<BR><BR>Dave
Tedeyan<BR><BR></SPAN>SENIOR ENGINEER<BR><BR>TAITEM ENGINEERING,
PC<SPAN><BR>10 Verizon Lane, Lansing, NY 14882<BR>Voice: (607) 930-3481
x6<BR></SPAN><A href="http://www.taitem.com" rel=noreferrer
target=_blank>www.taitem.com</A> [1]<BR><BR>Links:<BR>------<BR>[1] <A
href="http://www.taitem.com/" rel=noreferrer
target=_blank>http://www.taitem.com/</A><SPAN><BR>______________________________<WBR>_________________<BR>List
sponsored by Redwood Alliance<BR><BR>List Address: <A
target=_blank>RE-wrenches@lists.re-wrenches.<WBR>org</A><BR><BR>Change
listserver email address & settings:<BR><A
href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org"
rel=noreferrer
target=_blank>http://lists.re-wrenches.org/o<WBR>ptions.cgi/re-wrenches-re-wren<WBR>ches.org</A><BR><BR>List-Archive:<BR><A
href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html"
rel=noreferrer
target=_blank>http://www.mail-archive.com/re<WBR>-wrenches@lists.re-wrenches.or<WBR>g/maillist.html</A><BR><BR>List
rules & etiquette:<BR><A href="http://www.re-wrenches.org/etiquette.htm"
rel=noreferrer
target=_blank>www.re-wrenches.org/etiquette.<WBR>htm</A><BR><BR>Check out or
update participant bios:<BR><A href="http://www.members.re-wrenches.org"
rel=noreferrer
target=_blank>www.members.re-wrenches.org</A><BR></SPAN></BLOCKQUOTE>
<DIV class=HOEnZb>
<DIV class=h5>______________________________<WBR>_________________<BR>List
sponsored by Redwood Alliance<BR><BR>List Address: <A
target=_blank>RE-wrenches@lists.re-wrenches.<WBR>org</A><BR><BR>Change
listserver email address & settings:<BR><A
href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org"
rel=noreferrer
target=_blank>http://lists.re-wrenches.org/o<WBR>ptions.cgi/re-wrenches-re-wren<WBR>ches.org</A><BR><BR>List-Archive:
<A
href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html"
rel=noreferrer
target=_blank>http://www.mail-archive.com/re<WBR>-wrenches@lists.re-wrenches.or<WBR>g/maillist.html</A><BR><BR>List
rules & etiquette:<BR><A href="http://www.re-wrenches.org/etiquette.htm"
rel=noreferrer
target=_blank>www.re-wrenches.org/etiquette.<WBR>htm</A><BR><BR>Check out or
update participant bios:<BR><A href="http://www.members.re-wrenches.org"
rel=noreferrer
target=_blank>www.members.re-wrenches.org</A><BR><BR></DIV></DIV></BLOCKQUOTE></DIV><BR><BR
clear=all>
<DIV> </DIV>-- <BR>
<DIV class=gmail_signature data-smartmail="gmail_signature">
<DIV dir=ltr>
<DIV>
<DIV dir=ltr>
<DIV dir=ltr>
<DIV dir=ltr>
<P style="TEXT-ALIGN: center"><SPAN
style="FONT-SIZE: 10pt; COLOR: rgb(31,73,125)"><FONT
face="Arial, sans-serif">Chris Schaefer\u2019s<BR></FONT></SPAN><A
style="FONT-SIZE: 12px" href="http:www.solarandwindfx.com" target=_blank><IMG
style="FONT-SIZE: 10pt; FONT-FAMILY: arial,sans-serif; COLOR: rgb(31,73,125)"
src="http://www.solarandwindfx.com/wp-content/uploads/2015/01/Solar-Wind-FX-Logo.png"
width=200 height=40></A><BR><I><SPAN
style="FONT-FAMILY: arial,sans-serif; COLOR: rgb(31,73,125)"><SPAN
style="FONT-SIZE: 9pt">Tel/Fax 585-229-2083 or Cell 585-748-1870 </SPAN><SPAN
style="FONT-SIZE: 12px"><BR></SPAN></SPAN></I><I style="FONT-SIZE: 12px"><SPAN
style="FONT-SIZE: 10pt"><FONT color=#1f497d><FONT face="Arial, sans-serif">5115
South Hill Road ~ Canandaigua New York 14424<BR></FONT></FONT></SPAN></I><I
style="FONT-SIZE: 12px"><SPAN
style='FONT-SIZE: 10pt; FONT-FAMILY: "Arial","sans-serif"; COLOR: #1f497d'><A
href="http://www.solarandwindfx.com" target=_blank><SPAN
style="COLOR: blue">www.solarandwindfx.com</SPAN></A> ~ E-mail: <SPAN
style="COLOR: blue"><A
target=_blank>chris@solarandwindfx.com</A></SPAN></SPAN></I></P>
<P style="TEXT-ALIGN: center"><I><SPAN
style='FONT-SIZE: 10pt; FONT-FAMILY: "Arial","sans-serif"; COLOR: #1f497d'><IMG
src="http://solarandwindfx.com/wp-content/uploads/2015/01/certs.jpg" width=200
height=56><BR></SPAN></I></P>
<P style="TEXT-ALIGN: center"><SPAN
style='FONT-SIZE: 10pt; FONT-FAMILY: "Arial","sans-serif"; COLOR: black'>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."</SPAN><SPAN
style='FONT-SIZE: 10pt; FONT-FAMILY: "Arial","sans-serif"; COLOR: #1f497d'></SPAN></P></DIV></DIV></DIV></DIV></DIV></DIV></DIV>
<P>
<HR>
_______________________________________________<BR>List sponsored by Redwood
Alliance<BR><BR>List Address: RE-wrenches@lists.re-wrenches.org<BR><BR>Change
listserver email address &
settings:<BR>http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org<BR><BR>List-Archive:
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html<BR><BR>List
rules & etiquette:<BR>www.re-wrenches.org/etiquette.htm<BR><BR>Check out or
update participant
bios:<BR>www.members.re-wrenches.org<BR><BR></DIV></DIV></DIV></BODY></HTML>