Fuses and Batteries - got lost

[alfisti 10+ year member]

Hi

I am planning to run my mono amp @0.5ohm (soundmagus vs3500.1)

Right now alt. is stock, main batt. is Varta AGM 60ah and there is 1 run of 0awg power cable.. fused 150A

I will modify my stock alt. at a auto electric shop.. Can electricians do this? (no aftermarket alt. for my car unfortunately)

Main battery is 6 months old. Planning to buy 2nd battery used = Varta AGM 70ah. So same model same type but different AH values. Will this be a problem?

I guess I have to upgrade fuses too. Power cable, which is after the second batt should be 250a.. right? Should I change the fuse after the first batt?(150a)

Click to read more...

 

[dbjunior 10+ year member]

You might be able to have you alt rewound to help make more power. Will need to know the rebuilt alt output but you might need more batteries in the back. If the alt can't supply an extra 150 amps over what the vehicle needs I'd put 2 or 3 70ah batteries in the back. The wire should be fused for its rating so cca 250a ofc 300a fuse the same both ends of the wire.