on that pix, just connect the ACC wire to the IGN ON CIRCUIT...

plain and simple...

so apparently, you wish to listen to stereo when the engine aint running?

 

so how come a red top is paralled with a yellow?

in theory, not just the same kind of battery. but try to get the same battery off the same pallet. if not the same production line!

any diff in the batteries will have a bad effect on both. one will be lower and try to suck the juice off the other. then visa versa.

that's why i think that HELROARING product is the best, since it ISOLATES the main batt to the aux, which charging them simultaneously.

heck, if you have space, install dual alternators...

 

That was just to test the system when I was installing it as the red one was the closest one to move and I'm lazy. I have (3) yellow tops now permanently mounted if you look at the rest of the pics on my website.

 

Would that work with a HELLROARING isolator?

 

the hellroaring one has a circuitry built into it so this stuff is not really needed or used.

i had a long conversation with one of their sales rep a fewwwwwwww years ago, and i kinda dont remember the intricate workings of the HR unit.

 

I drew htis diagram up based on one Hellroaring sent me. Does it look right? Where should I put my fuses?

 

most people dont put fuses.

me? i'm paranoid as heck.

i'd put a 200+ amp circuit fuse between the + of the red batt and the input of HR device.

then depending how far the yellow batt is to the HR device, i'd put another 100 (or so) circuit BREAKER. i mean if it's really close, i mean it's right next to it, it may not be needed.

then of course, from the yellow batt to the amps, fuse, fuse, fuse...

 

for between the red batt and the HR device, this is something i would do:

http://bluesea.com/product.asp?Produ...63&l1=7463&l2=

costs around $40 or so from west marine.

 

Yea...someone at Hellroaring suggested I fuse before and after the HR device. Thats what Ill do. Im going to have 4 or 5 High Amperage fuses under my hood lol.

As for the yellow top, itlol be mounted right next to the red top. The Optimas are approximately half the size of the original hunk of electricity.

 

Whatever you do, make sure to post your resolution/set-up in the "Dual Batteries FAQ"