Gentlemen;
It doesn't matter how one monitors the charging system. One can use lights/buzzers a Voltmeter/Ammeter, or any combination of these.
As Walt would say; "make your own decision".
The point that's lost here is that "Hi-Amp" Alternators aren't needed in MOST cases.
From the 30s thru 1954 all Chevrolet vehicles had a 6V 30 Amp system and all was well. With high beams on and the radio/heater the system "handled the job".
When the (early) vehicles are 'converted' to 12V the current requirments drop in half and the (55-61) Generator still can produce (30A) which is much more that the vehicle needs, by almost two thirds.
If one choses to add A/C then the (62-72) Alternator (30A) is way more than enough to; "handle the job".
These "high Amp" units are designed for 'high current dependant' devices, which Commercial vehicles, Motorhomes need and Hot Rods seldom have.
Happy trails to all.
