What do you think about the idea of an inline 50 amp fuse (50 amps is the gauge rating)? I am wondering under what circumstances the fuse could blow. If the car came with a high output alternator I wouldn't worry about it since the manufacturer would have balanced the system with the appropriate gauge or yes, a voltmeter.
So Ed, if you put in a 20amp inline fuse, how often would it blow and under what circumstances is the question.