Battery combiner(s) hookup

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Speakrdude

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Feb 25, 2004
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I am about to hook up 2 ACR (automatic Combiner Relay) to my 12 volt system. I am trying to use my Alternator to keep all charged while running. When on shore power I have 2 seperate dual chargers.

Look over my diagram and make any suggestions.
Thanks
 

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Fl_Richard

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Re: Battery combiner(s) hookup

Yes it will work but I'm not sure it's optimized. Your AC bank could give you problems if a battery fails or has a different charging profile than the other. You could possibly but not very likely end up with one battery stealing the charge from the other. These batteries need to be matched.
 
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Jello Shot

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Re: Battery combiner(s) hookup

Instead of using the A/C batery switch in "both"; run the batteries in parallel.
 
bruceb58

bruceb58

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Re: Battery combiner(s) hookup

Jello Shot said:
Instead of using the A/C batery switch in "both"; run the batteries in parallel.
Click to expand...
Why? This way he can isolate if need be. In the future I would get two 6V Trojan batteries instead of 2 12V batteries.

Connect the output of the alternator to the common of the top switch.
 
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Speakrdude

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Re: Battery combiner(s) hookup

Yes, The added protection of being able to quickly isolate or turn off one of the batteries is what I was thinking. The batteries are matched AGM type 70ah each. Yes I should have used to 6v golf cart batteries with more am hours and a bigger AC unit.
 
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