No idea. Not familiar with non standard type batteries. But just a couple if I recall. This boat is insanely loud, and the stereo won't die. After being tied up next to him all day, when we all left, both the wife and I thought something was wrong with our motors. Opened hatch and everything looked fine, but sounded muffled....... Took an hr for our hearing to come back. Too much for me.

not to be a party pooper, but coming from having a truck stereo that blew the back window out twice. I suspect in a few years he will be needing new batteries for his hearing aids. mine are at least rechargeable. I had absolutely no idea how bad it really was until this first time I took them off and it seemed like the world fell silent.

That reminds me of a AC/DC concert I attended many years ago. Thought it would be cool to sit next to the stage. Concert was on a Friday night, I recall laying in bed on Sunday night with my ears still ringing..

From the ad link -
4 agm 2800ah power cells - 2 new cranking batteries isolated so you can always start engines - 90 amp power inverter to charge power cells while on shore power and battery maintainer for cranking batteries

With 6 amps, I can see him going one day maybe but not two. Too many factors when people brag about play time.
"All day" to me is 8+ hours.
He only has 6 10" IB subs so those will not consume near as much power as even two hard hitting ported 12"
With all that invested, why would he not plug in over night? or run a little Honda 2k genny like many do?

I bet it's a hell of a system regardless with that much moving cone area!

Back to OP's question -
Distribution block - one of these fused on both pos and neg. http://www.knukonceptz.com/productDe...?prodID=KNF-60
Will accept 2 1/0 power leads and 4 4 ga amp leads.

Here is a pretty tight rack I have had my eye on when it comes time for a make over.....