You can increase the amperage of your alternator by changing the diodes.
Selecting different sized diodes can alter the output regulation of the alternator.
A smaller diode will increase the charge voltage by more than a larger diode (due to the voltage drop varying with the diode current).
The most powerful alternator is a 320 amp alternator.
The highest 12 volt produced by Prestolite Leece-Neville is the J-180 mount 4890JB and Pad Mount 4962PA both of which put out 320 amps.
When it comes to 24 volt alternators there is one manufacturers that really stands out – C.E. Niehoff has their 500 Amp C-803D.
A high output alternator will not hurt your car or electronics in the car.
The high output alternator does not put out more voltage but instead more amperage and so as long as you're needing the excess amperage then it can be good for the car.
Too low amperage can harm your car but too much amperage cannot.
When it comes to amperage and alternators you can never have too much amperage when it comes to alternators; therefore, you never have to worry about choosing an alternator with too high of a rated output.
So high-output alternators will not harm your components or charging system, no matter how high you go with the amps.
Some advantages of a high output alternator are you're able to reduce the depth of a battery's discharge also known as cycling.
That's because an oversized alternator produces more output at lower speeds, including idle.
That increased output prevents the battery from having to help supply the load and this keeps it at a more ideal state of charge.
A higher amperage alternator will not pose any problems to the vehicle's electrical system.
For example, you may have a 100 amp alternator in your vehicle and the turn signals have small wiring and will only use 10 amp of power.
Upgrading to a 200 amp alternator will not affect these components.