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.
Using buss bars allows for creating banks of lots of batteries which allows for
redundancy. I’ve 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.
Tom
From: Chris Schaefer
Sent: Monday, July 23, 2018 8:28 AM
To: RE-wrenches
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/
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--
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."
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