Dual battery circuit braker/fuses?

[woytovich]

More dual battery questions...

It is recommended (the safe and proper plan) that a suitably sized circuit breaker or fuse be placed as close as possible to EVERY 12v source (batteries and alternator). The goal is to protect against against a cable getting cut/chafed and shorting to ground. I can see this as important in my planned set-up where I'll have the 2nd battery on the opposite side of the engine from the 1st - that's a long wire with plenty of opportunity to get damaged, especially in a front end crash. The other wires: alt to isolator to switch to 1st battery are all going to be short with much less opportunity for a problem.

First I am now considering finding a way to mount both batteries on the (USA) passenger side of the engine compartment.

Second, and my real question here: does anyone have experience with a dual battery circuit breaker/fuse install partcularly in a system with a higher amp alternator (144) and a high amp draw winch (M12k Warn). I need a source to purchase and info on the install.

i want to do this right but I don't want to go crazy - even though I tend to be a belt and suspenders kinda guy.

Thanks,
mark

 

[BlueHZT60]

I'm a couple months & years ahead of you.

Two on front left: Hood probably won't close - unless you spend big bucks on one of those stubby Oddyssey Batteries with side posts. Don't dip into your inner fender (tried that - tire clearance issues). Finally, weight factor. Oh and you'd lose your headlight washer bottle

On the circuitry, take a look at West Marine and the Terminal Fuse Blocks. After all the research I did, I ended up using circuit breakers & huge fuse blocks. My batteries are front right & two in rear right. If I do it over, I think I'd go with the terminal fuses and the circuit breakers at distribution points. At least now I have a dedicated start battery and don't have two deep cycles wired together straight to the starter -with winch & other accessories off the same starter bolt (don't laugh, it worked for 3 years with no problems). Bob

 

[woytovich]

I'm a couple months & years ahead of you.

Bob... thanks for the info. I do have a 2" body lift that'll help clear batteries etc. I'd love to see how your batteries sit in the engine compartment... and where you suggest putting the fuses...

I was looking at these:
“blue sea 5001” search results - nuLime.com

But what fuses to use in a system with the M12k winch? Different ones in different places I guess? The alternator will max at 144a (less I'm sure). The batteries will dump out how many amps at short to ground? The winch can draw up to 440a... so 220a on each battery (depending on the wiring layout of course)

How is the best way to figure this?

 

[Joe_E]

If you are desmogged, you can fit an OEM overseas tray in the drivers side of your rig like I had. The overflow tank mounts on the hold down stud.

 

[Joe_E]

OOps just realized you meant to mount both in the pass. side.
Never tried that.

 

[woytovich]

If you are desmogged, you can fit an OEM overseas tray in the drivers side of your rig like I had. The overflow tank mounts on the hold down stud.

That's what I have now (these parts are available from USA dealers by the way). I don't have the battery in there yet though. And yes, I am considering putting both on the pass (USA) side to shorten the wires needed (although I have those already too)

 

[mrlocksmith]

I Posted this a while back HTH...


Mark


https://forum.ih8mud.com/60-series-wagons/213526-write-up-fj60-dual-battery-install.html