Originally Posted by
peepoweredcar
Sorry if you answered this and I just didnt understand, but does that mean that generally they are all gonna pull the same amount of power per watt? Like a 24v isnt gonna be more efficiant cause it will pull twice the power from car as a 12? Thanks-J
Yes. Watt is the measurement of power and it the product of amps (flow) time volts (pressure). A 30 amp 14 volt alternator will produce a maximum of 420 Watts of power, and a 15 amp 28 volt alternator will produce the same 420 Watts of power. And since the Watts are the same, it will take the same amount of horsepower from the engine to generate the same amount of electrical power (watts) for each alternator.
1991 Plymouth Acclaim 3L V6.
1 dry cells with nineteen 6"x8" 316L ss plates, driven by constant current PWM set at 35 amps (13.3V at PWM). 28% KOH electrolyte. Total measured output 2.5 lpm. Mileage went from 18 to 26 mpg, all city driving (44% increase). EFIE set at .370 and I still need to play with ignition timing.