Well I've had the same 60 amp alternator and battery in my car for over 5 years so obviously some of the above information is incorrect. I suspect the Mopar based externally regulated Denso alternator is what some of this information is based on.
Toyota has used the same basic 60 amp alternator on their vehicles with dozens of electrical systems running constantly for over 200,000 miles with the original battery and alternator. The way systems are wired with relays and carful wire selection has more to do with how many amps you need from your alternator.
Gus