How many batteries for this set up?

[lilsullivan04 10+ year member]

Hi,

I was wanting to know how many batteries would I need for this set-up. I'm planning on getting a DC Power 320 amp SPX-i high output alternator. And for the sound system I will have a total of 7, 000 watts rms I will be changing out my stock battery.

I was thinking of going with XS Power batteries. The XS 4800D will fit in my stock location. What addition battery or batteries do I need and how do I wire them?

I have a 2011 GMC Sierra and it has the extra battery tray and I could put an extra battery there. Would I need more than two batteries?

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[mlstrass 5,000+ posts]

How much of your 7kw total will be sub amp(s)? Personally I wouldn't spend money on xs batts. I've done a few builds with them for other people and they do nothing more then my dekas other, then make your wallet a lot lighter....

 

[lilsullivan04 10+ year member]

I'm planning on getting two Sundown 3500D's and two RE XXX 12D2's. So the amps together will be 7kw. What other battery(s) would you recommend? And how should I wire them?

 

[mlstrass 5,000+ posts]

4 G31 Dekas is what I'd do. SuperStart+, NGT Extreme, Duracell at Sam's club, all the same batt...

You wire them all in parallel. I'd do 2 POS runs of 1/0 from front to rear batts. 2 NEG runs in back. Fuse POS runs at BOTH ends.

 

[lilsullivan04 10+ year member]

Thank you