Wanting to bump 2 hdc412-1A subs on 2 MRX-240 amps. I have dual alt's, 350 amp Mechman I was wanting to power a battery bank to power the amps. Keeping it separate from may upgraded factory alt and yellow top Optima that powers the multi channel amps witch power my Polk's. I was planning on charging at 16 volts with the external voltage regulator. I wanted some suggestions on what size, what brand and how many power cells to apply here. Incase your wondering the wire is 0 gauge Kilk.