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Date:         Mon, 9 Feb 2015 07:36:59 -0500
Reply-To:     Larry Alofs <lalofs@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Larry Alofs <lalofs@GMAIL.COM>
Subject:      Re: Charging batteries in parallel ?
Comments: To: Dennis Jowell <dennisjowell@gmail.com>
In-Reply-To:  <C9AE1701-B215-4C32-94DA-890BADD1FE4A@gmail.com>
Content-Type: text/plain; charset=UTF-8

Assuming these are 12V batteries and you are operating a 12V system, you must connect the batteries in parallel, all the positive terminals connected together and all the negatives together. A charger designed for 12V can then be connected to any of the batteries.

Larry A.

On Mon, Feb 9, 2015 at 7:06 AM, Dennis Jowell <dennisjowell@gmail.com> wrote:

> Tim, > Which way? positive of #1 and then negative #3? > > Dennis Jowell > Scotch Hollow Farm > Newbury, Vermont > > > > On Feb 9, 2015, at 7:03 AM, Tim Whynot <timwhy@MSN.COM> wrote: > > > > On Sun, 8 Feb 2015 10:15:07 -0800, Rocket J Squirrel > > <camping.elliott@GMAIL.COM> wrote: > > > >> "Maybe it doesn't even matter." > >> > >> If they are in fact wired in parallel, then nope, it doesn't matter. > >> > >> -- > >> Jack "Rocket j Squirrel" Elliott > >> 1984 Westfalia, auto trans, > >> Bend, Ore. > >> > >>> On 02/08/2015 08:37 AM, Dennis Jowell wrote: > >>> I'm going to install 3 -UB 122230 -12V 22Ah AGM Sealed Deep Cycle > > Batteries in my Westy. Installed in parallel. My question is how to > > charged them with my on board charger? Do I put positive on #1 battery > and > > then put negative on #3 battery or just use #1 battery to charge all of > > them together.? Maybe it doesn't even matter. > >>> (1988 GL Westy full camper) > >>> > >>> Dennis > >>> > >>> Dennis Jowell > >>> Scotch Hollow Farm > >>> Newbury, Vermont > >>> > > > > Dennis, I would suggest you wire them as you stated. I had my aux > > batteries wired the other way and it killed a brand new battery. When I > > took the battery back to be tested it had lost half of its capacity, tho > > it would charge. One bad battery in parallel can bring the others down > > with > > it. >


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