Quote Originally Posted by Retz View Post
Mdyo ot lang... Sa genset may alternator at may katumbas na engine. Either kung mas malaki ung alternator or mas maliit compared sa rating ng engine ay wala din mangyayari if you dont change or upgrade your engine. What i mean is hindi ba match dapat alternator sa size ng engine? Mas malaki nga alternator mo pero ung engine mo could only give this much. Just an analogy.
For all other purposes, yes. Since you try to mate the output with how much load you throw at it. It's kinda useless to have an alternator capable of 300A when you can only generate 30A of power. That's like feeding your car's engine with a fuel running up a Zesto straw.

However, this is not a problem in a car since your car's internal combustion engine can output so much horsepower. If you want to do it at a very simplistic view, 150A * 12V = 1,800W = 2.41 horsepower -- a minute amount on how much horsepower you generate at a given engine RPM.

This is why the people who set up their sound setup extensively (aka me) sees reduced fuel efficiency. One is that an ICE system will take up weight inside your car and second it makes your alternator demand more power depending on load. This is why overall, I suffer a rough -1km/L automatically on my day-to-day travels.