i'm currently looking at running the following daily. i'm going to be running about 2 kilowatts. and pulling about 230-250 amps, at max draw. right now i only have an 80 amp alternator that will soon be upgraded. i've found a 160 amp alternator, but am looking at having a custom 200 amp alternator built. i'm going to have a 30-50 amp gap to my amps. so here is my question, what type of batteries should i run? is this gap going to severly effect my amps and how much of the alternator draw goes to powering the car rather than my system? also, how does having two batteries help? won't they both eventually drain anyway? also what kind of batteries do you recommend and where is the best place to purchase them?