[RE-wrenches] Strings and series of batteries

[Tom Elliot]

"If you connect links  between all of the positives, and links between all 
of the negatives,
 to parallel the battery, then the only issue is where you connect the 
charge source and/or inverter."

Hugh,

The connection is very easy, if you look at the photos on the page I linked 
to the connections to the inverter breaker (which is where I also connected 
the charge source) come off the bus bars.  It's actually a very simple 
installation and I found it much easier and safer to work on that a large 
series/parallel bank of L-16s, which was what my first bank in that system 
consisted off and it turned out to be a mess (designed and the components 
built by Jade Mountain...)

Tom



--------------------------------------------------
From: "Hugh" <hugh at scoraigwind.co.uk>
Sent: Thursday, December 03, 2009 8:30 AM
To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
Subject: Re: [RE-wrenches] Strings and series of batteries

> Just for a contrasting opinion:
>
> I rarely use grease or vaseline unless it proves necessary.  I have
> changed out battery banks after seven years and the connectors are
> still pristine whilst dry.  I agree that sometimes there will be
> localised corrosion on battery terminals.  I find it rarely, and I
> deal with it as and when.  I might use vaseline then.  Or spray on
> some oil.  Not a big deal to be honest.  The contact resistance is
> not affected by corrosion on the outside.  Probably due to some
> moisture arriving on the terminal?  But vaseline/grease attracts
> dust, makes a big mess and mess is not nice around batteries.
>
> Bus bars sound great, but what a hassle.  If you connect links
> between all of the positives, and links between all of the negatives,
> to parallel the battery, then the only issue is where you connect the
> charge source and/or inverter.  I have learned to connect them at
> opposite ends of the parallel links.  'Diagonally opposite' you could
> call it.  In this way the resistance is identical to each string.
> One string has a direct connection to plus.  One has a direct
> connection to minus.  All have equal number of links between them and
> the inverter.  If there is a wind turbine then I will often connect
> this to two corners and the inverter to the opposite two corners,
> making it very difficult to (both) disconnect the battery and (also)
> leave the wind turbine connected to the inverter.  This probably has
> saved a few inverters from instant death due to carelessness.
> -- 
> Hugh Piggott
>
> Scoraig Wind Electric
> Scotland
> http://www.scoraigwind.co.uk
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