Adding to an existing battery bank [RE-wrenches]

[Hugh]

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>
>Question: what would be the least potentially problematic battery bank
>reconfiguration? Should the existing strings be left intact

yes very much so.  As the string gets older it will draw more current 
to keep all its cells in a good state of charge.  If you put them in 
series with new cells then the string will not be equalised without a 
lot of overcharging of the new ones.

You want all the cells in one string to be identical if possible but 
it does not matter so much if a different string has different cells 
because it will draw a different current.
-- 
Hugh

Scoraig Wind Electric
http://www.scoraigwind.co.uk/

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