12 volts
12.5 - 14 volt
I will assume you are serious. It doesn't produce volts. It simply limits them. It should allow up to 14.3 or so and shut off when the battery is fully charged.
neither...it should have 14.63 volts
Fully charged battery should have 12.6 volts. 75% charged 12.4 volts, 50% charged 12.2 volts, & 25% charged 12.0 volts.
12 volts DC.
13.5 to 15.5 volts
From 13.5 to 15.5 Volts.
13.5 to 16 volts DC.
around 14-14.5 volts
It can put out too many volts and destroy the battery but not drain it. The alternator should put out between 13.5 to 16 volts.
Engine running at idle you should read 13.5 to 15.5 volts.