How many ANL fuses do I need?

[Mike Waters 10+ year member]

I have 3 amps (2 WFO 35.1's and a WFO 4.150x 4 channel) and 4 Batteries ( 3 XS D3100's for amps and 1 Duracell for starting) and a Singer 320amp alt. Where should I put them and how many ANL fuses will I need?

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[wew lad 5,000+ posts]

give each amp its own run of wiring directly from the batteries and fusing

250-300a fuse will be fine

if all the batteries are together in a group dont bother fusing them. fuse from the front to back runs though and from the batts to the amp. i.e. 2 fuses near front batt within 18 inches and rear batt within 18 inches, then 18 inches from rear batts to each amp would be 6 fuses total. dont bother fusing the alternator imo but you can

the 4 channel only needs a 50a fuse, they dont use much current at all

you need dedicated ground runs to the rear batteries and then to the amps. absolutely necessary for that power