Ok, just looking through a marine cat, same company where i got my fuse holder, distro blocks, and several other things, that have worked better then any automotive equipment i could find. and since i may need to upgrade to more then 1 battery in the future, i was wondering if this would work on a car?

http://www.bluesea.com/product.asp?Product_id=53476#



And i have one other question, so i wont make another topic, ill leave it here:

what is an aic rating?

As far as i understand it, it is The fault current that a device, normally a fuse or circuit breaker, is capable of breaking without damage to the circuit.

so how can a 150 amp ANL fuse be rated @ 6000 aic?

while a class t fuse @ 20,000 aic.

What's the need for it? I run 2 batteries and have never needed an isolator or anything like that, same with a bunch of us here.