A simple question - beginner stuff

[John Penney <jpenney@tiac.net>]

Hi all

    I have a simple question about a small home-built ev that I'm trying to use
"consumer" parts for as an off-the-shelf build-it-yourself experiment - if you have a
charge circuit that is normally used for (and therefore I assume designed for) charging
1 12V battery, what sort of problems do you run into if you hook up 10 more 12V
batteries in parallel, so the Voltage is the same but the number of Amp-hours goes way
up?  I have thought of only 1 - the charge time goes way up.  Afraid I'm just a bit new
at this - I have some schooling in EE, and I'm capable of operating a soldering iron
and a DMM, but in some things I'm just a bit green.

    Also, I think I will have to use a bus bar for this setup, but I don't know why -
I've just seen it mentioned.

    And finally, I'm planning on taking this production-built circuit board to an
engineer friend to find a place in the circuit where I can attach DC leads to enable me
to charge the batteries with a random DC power source. (Voltage and Amperage will be
controlled) - anyone ever do anything like this?

Any help is really really appreciated.

Thanks,
John