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  #1  
Old 09-24-2007
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Dual alternators

Has anyone done it? Can it be done?

I was thinking about getting an extra battery to run all my accessories off and was wondering if there was anyway to hook up an extra alternator to keep the battery charged.
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Old 09-24-2007
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not a lot of room to add the extra alternator.....IF you took the A/C off i could see it being possible with custom brackets, but other than that it wont fit....
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Old 09-24-2007
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in my 92 ranger i had dual optima yellow tops and they were always charged perfectly. mnever had a problem
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Old 09-25-2007
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I did it on a 2.9L with v-belts non A/C. Can post pics after work.

Mike

The pics






Last edited by hosse; 09-25-2007 at 04:34 PM.
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Old 09-25-2007
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Quote:
Originally Posted by hosse
non A/C.
that makes the difference.....
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Old 09-26-2007
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Yea here in Florida we kind of need our A/C so i guess thats alil out of the question.
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Old 09-27-2007
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I would do an HO alt with 2 batts. Put one in your toolbox.

It's super easy to do too!! I can help.
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Old 09-27-2007
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Quote:
Originally Posted by jrpro130
I would do an HO alt with 2 batts. Put one in your toolbox.

It's super easy to do too!! I can help.
thats what i was thinking, theres some 200 or 220 amp ones on ebay. i would also like to run 2 batteries, but, wouldn't that make your electrical system either .5 or double what it is now? so like 6 or 24 volts?
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  #9  
Old 09-27-2007
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What you need is 2 batteries, and an isolation kit. Both batteries will charge together, but you can drain one while the other one remains at full charge.

http://www.bcae1.com/battiso.htm

http://www.newmarpower.com/Battery_I...tegrators.html

Last edited by Takeda; 09-27-2007 at 05:44 AM.
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Old 09-27-2007
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Quote:
Originally Posted by ranger banger
i would also like to run 2 batteries, but, wouldn't that make your electrical system either .5 or double what it is now? so like 6 or 24 volts?
as far as making a charging system 24v, that is all in how you wire the batteries together.....if you get a dual battery kit from Painless Wiring, then you won't have to worry about that...
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  #11  
Old 09-27-2007
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Quote:
Originally Posted by ranger_banger
thats what i was thinking, theres some 200 or 220 amp ones on ebay. i would also like to run 2 batteries, but, wouldn't that make your electrical system either .5 or double what it is now? so like 6 or 24 volts?
No....2 12V batteries in parallel will still be 12V, with a larger current capacity.
With all the electronics in the new vehicles today, Don't ever try and connect 2 batteries in series, which will give you 24V!
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Old 09-27-2007
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Parallel will be 12v. I had it on my old car without an isolator.
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  #13  
Old 09-28-2007
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Quote:
Originally Posted by Takeda
No....2 12V batteries in parallel will still be 12V, with a larger current capacity.
With all the electronics in the new vehicles today, Don't ever try and connect 2 batteries in series, which will give you 24V!
well i knew they were designed for 12 volt systems. i just didn't know if or how to wire it to stay the same voltage, thanx guys
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  #14  
Old 09-28-2007
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yeah ive seen trucks(not rangers but still) with 12 batts
as long as you do it parallel your in the clear
ive also seen dual 220 amp alts on a suburban.. alot more room under the hood haha
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  #15  
Old 09-28-2007
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1 High Output alternator is all you want to do......

Running 2 dosen't make sense when HO alternators are very inexpensive......It would coost more to set 2 up.......
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