Before I make the BIG Purchase

[njknittle 10+ year member]

Before i make the big purchase, i was just wondering how i would go about setting up another battery. Lets say i have a battery in the engine compartment and a battery in the back with the with the two Amps. Would i run two cables to the back battery from the front battery. And can i connect both amps Power Cables to the back battery?

And what about grounding, do i have to ground each amp separately as well as the back battery?

AND...(sorry i know) do i just need a fuse for each amp, whos power cables will be running to the bac battery?

Thats a lot, im sorry. But just wanna make sure i have everthing before i make a 2000$+ purchase

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[gckless 5,000+ posts]

Before i make the big purchase, i was just wondering how i would go about setting up another battery. Lets say i have a battery in the engine compartment and a battery in the back with the with the two Amps. Would i run two cables to the back battery from the front battery. And can i connect both amps Power Cables to the back battery? And what about grounding, do i have to ground each amp separately as well as the back battery?

AND...(sorry i know) do i just need a fuse for each amp, whos power cables will be running to the bac battery?

Thats a lot, im sorry. But just wanna make sure i have everthing before i make a 2000$+ purchase

How much/what size wire you run from front to back will depend on how much amperage draw potential there is from front to back. How are you grounding your rear battery, running a ground wire from front to back or going with frame?

You would connect your amps directly to your rear battery. Ground the amps to the battery's ground.

Fuse everything. Wires in between the batteries, wires to/from amp and battery. If you have a long ground run, I'd do that as well.

 

[njknittle 10+ year member]

Everything will be 0 Gauge, and ill most likely be grounding the back battery to the frame. And thats a lot of fuses!

 

[gckless 5,000+ posts]

What amps? Do you have a bigger alt?

It's not absolutely necessary to fuse, but do it.

 

[njknittle 10+ year member]

Rockford Fosgate T2500BDcp, Rockford fosgate T600-4, with a 200a Alternator and 100+ah battery

 

[gckless 5,000+ posts]

You should be ok with one run of 1/0AWG front to back. Grounding is up to you, if you can find a good spot for frame it will probably be fine, or you can run a ground wire alongside the positive. If you run a ground wire, it's smart to fuse that too.

 

[njknittle 10+ year member]

So you can wire , the front and back battery, Pos to Pos and Neg to Neg?

 

[gckless 5,000+ posts]

So you can wire , the front and back battery, Pos to Pos and Neg to Neg?

Yep. That's what you planned on doing right? Or you didn't know? But yes.

 

[njknittle 10+ year member]

Thats what i thought i was suppose to do but i wanted to make sure. So i dont have to run a ground from the back battery, and i dont need fused between the two batts right? If i do, what size fuses should i get.

 

[njknittle 10+ year member]

@ gckless

 

[gckless 5,000+ posts]

Thats what i thought i was suppose to do but i wanted to make sure. So i dont have to run a ground from the back battery, and i dont need fused between the two batts right? If i do, what size fuses should i get.

You do need to ground front to back in some way, either to frame on both sides or run a dedicated ground wire. And yes, fuse between the two batteries on the positive wire for sure, and if you run a ground wire from front to back fuse that as well. 250A for CCA, 300A for OFC.