Vehicle & Technical > Series Land Rovers

2 Batteries

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ed209:
Hi

Running 2 batteries parallel, Good or bad?

Regards

Bob Ajob:
IIRC Good if they are the same condition, same type, have got the same charge.
Bad if not.
You wouldn't want to do them in series, or this would be 24v...

Not quite sure how you wire them up though, not done that mod. Also not sure on how big an alternator you need to fill them both up at the same time.

wheeler:
ide like to put a second battery on as well how to

ed209:
Hi

What i have learned is that the standard alternator wouldn't handle the 2 batteries, True?
To keep it 12v the earth from one has to go to the earth from the other and the same with the live?

Regards

Bob Ajob:
Hi,

Not sure on alternator and amps etc, what size alternator do you run currently? The standard is different depending upon the vehicle. It may be that you just need a larger one as the charge will only be half to each battery, though your current alternator is probably more than you need for one battery. It all depends on what your battery powers - starting, lights (sealed beam or halogen - what wattage?), additional spot lights, radio, cb, etc etc.

Earth to earth, live to live makes it parallel and hence remaining 12v.

I can't recommend how to add a second battery, as I never have done so, sounds good in theory, practice may be different. Connecting them should be simple, it's split charging and having separate batteries for starting and aux which gets complicated. I would recommend searching through the "modified" section on this forum for split charging to get additional info, it all depends upon your needs.

Regards,
Rob

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