NEED HELP W/BATTERY BANK

[Rosita_F250]

So I have a 2014 F 250 and im running 4 Taramps smart5bass 5000's on 8 SKAR vxf-12-2's @ .5 ohm. All are double 2/0 strapped to the fuse blocks. I have 4-4/0 b+ and b- going to my battery location. Each amp will pull 460 amps max (which is where it will be). I'm working on adding a duel alt set up with just 1 400 amp alt. I currently have the Big 3 upgrade done to the factory alt. My second alt is going to be for charging aux batteries only ( although aux batteries share same ground path as truck ). I will have 2/0 b+ and b- from aux alt to battery area, and a 2/0 b- going to the frame/body. So my question is what kind of battery bank should I use/build and should I use a Ultra Cap as well?

460 amps × 4 = 1840 amps - 400 (alt) = 1440 ah's or 5000w rms ÷ 14.4v = 347 amps × 4 = 1388 amps - 400 alt = 988 ah's still needed. Correct?

[crispy_chick3n]

looks like you are in the ballpark, depending on battery chemistry that is. its always best to overbuild the electrical system. if you are going dual alt, why not throw a pair of high outputs on it instead of leave the factory. a pair of 400s with a fat lithium bank and you wont have to worry about voltage drop. buildidng it on the edge of usable will leave you having to turn it down/ off every so often to allow the batteries to recharge.

 

TLDR: more alternator = longer play time / less battery required

[Rosita_F250]

I probably will do that, but im still unsure of my battery situation. Should I build a bank with a bunch of small cells or go with 4 - 280 ah batteries? And if 4/280's then what kind? Any help is greatly appreciated.