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Psychic Mechanic
Psychic Mechanic, ASE Certified Technician
Category: Car
Satisfied Customers: 1426
Experience:  ASE Master L1 20 years experience
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My stock 80 amp alternator to a 150 amp alternator..batt..gauge

Customer Question

I am changing my stock 80 amp alternator to a 150 amp alternator. I have a dual battery set up that uses a hi-performance batt isolator. Which wires should I increase the gauge? This is an offroad vehicle and I will be having a lot of accessories connected.
Submitted: 7 years ago.
Category: Car
Expert:  Psychic Mechanic replied 7 years ago.
Your alternator will only put out Amps As needed You will need to increase the guage wire from the alternator to the any additional loads. You should have a heavy guage wire from the alternator to the isolator. You could go a little lighter from the isolator to each battery.