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Multiple batteries question


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Posted

I'm running 3 agm batts, with the big 3 and an HO alt with all 0 gauge OFC... 2 questions...

I have 2 in the trunk, do I need a fuse between them?

And the second is do I ground them off of each other or make each battery it's own ground ?

Posted

YOu do not need a fuse between the 2 rear batteries. You want a fuse close to the battery in the engine comp. and one Near the 1st rear batt that the 1/0 run will be going to.

Posted

when in doubt, fuse it. But I wouldn't.

ground them off eachother. you don't need to ground batteries to the frame in the trunk. Just wire them pos to pos to pos and neg to neg to neg

you still need to ground them to the frame..

i would go pos to pos and neg to neg to frame

Posted

Ok, so there wouldn't be any benefit from grounding each battery out separate? And what size fuze should I run between my alt and first battery and Inbetween my first and second battery? The wire can pull 375 amps through a 20 ft run and my alt is 180 amps... I'm running 2500 w rms

Posted

no, you only need a pos run from front to back. ground the front to frame then ground the back to the frame..

now i get what his saying but its cheaper and better to ground to frame than to run a ground from the front to the back.. Damore have tested this and prove that grounding to frame is the way to go

Posted

when in doubt, fuse it. But I wouldn't.

ground them off eachother. you don't need to ground batteries to the frame in the trunk. Just wire them pos to pos to pos and neg to neg to neg

you still need to ground them to the frame..

i would go pos to pos and neg to neg to frame

what about if big 3 is ground to frame under the hood?

Edit: just answered my question. looks like I did mine wrong :0

Posted

when in doubt, fuse it. But I wouldn't.

ground them off eachother. you don't need to ground batteries to the frame in the trunk. Just wire them pos to pos to pos and neg to neg to neg

you still need to ground them to the frame..

i would go pos to pos and neg to neg to frame

what about if big 3 is ground to frame under the hood?

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