Regarding dual battery

[ted44]

I'm in the last leg of putting my dual battery system in and for the life of me I can't see the reason for the fuses in the system, the one's just off the main battery & the auxiliary? I understand on say a patrol where your going from one side of the engine bay to the other, the need to fuse the cables is obvious in that situation. But with the batteries in the same box, it doesn't make sense to extend the cable to incorporate the fuse?
Am I missing something!
Cheers ted

[austastar]

Hi,
I guess you are almost the same as putting in a pair of batteries in the same box (which would not be fused between the two) except that your dual battery system is acting as a switch.
You could use a heavy duty pre-wired inline fuse instead of the connecting wire which would put the fuse in the circuit where the dual battery system suggests.

Image (http://aeroelectric.com/Pictures/Fuses/Fuse_Holders/MaxiFuse_Holder.jpg)

cheers

[ted44]

Thanks for that, but I/or the destructions say 100amp fuse, I have two Mega fuses but as I said I would need to extend the battery cables just to put them in. At the moment the cables are at least 6 inch long! I don't want to put another 6 inch in just to have a fuse in the circuit.
Obviously the auxiliary battery will have a circuit breaker in to protect the cables going through to the back of the 110, and stop overloading the cable!
What do you think/or what have other people done.
Thanks ted

[ted44]

All installed, will have a think/ask around to see what the potential issues could be with no fuses!

[nedflanders]

The 12v battery's on hgv's and coaches are linked together to make a 24v system, these links aren't fused.