Outer Limits 4x4 Board

Gday, currently in process of rewiring dual battery system that came with the my fourby, and was wondering what alternator current rating is so i can determine what size relay to use. i have a 80 ah deep cycle battery with a century n70zzl (600cca, 140rc) starter battery, does anyone know what amp hours that would be?

GU 2.8 alternators are 100Amp. I found this out when i had to re-build mine 6 months ago 'cos nowhere makes an aftermarket one.

i just had to replace mine and it is 110amps
and not cheap if you have to replace it...
cheers GIVEITABIT