What size ANL fuses do I need for my setup?

[Mike Waters 10+ year member]

What size ANL fuses do I need for my setup? I have 2 amps, one is a Ampere Audio AA3800.1 and the other is an Ampere Audio AA125.4 I have a Singer 320 amp alt and two XS power batteries (d3400 and d3100). I have a double run of 0ga to the back and I will be putting in fuse holders and need to know what size fuses to get.

Thanks in advance for any help.

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[supra1987]

For 0ga go with 250-300 amp fuses.