Seriously another alternator question.

^^I'm old enough I've had a few vehicles with generators. VERY happy to "see them go." I have some older outboards with "optional" generators. "Generally," (LOLOL) I remove them. Not really needed just to go for a boat ride

Generator regulators "mostly" have 3 relays.......the voltage regulator, the current limiter, and the "cutout" which (is supposed to) isolate the generator from the battery when output is low or not running. If not the generator will become a motor

Generators must be "flashed" or polarized as to polarity, and therefore any generator can be used on either polarity when properly polarized, BUT many OEM regulators are polarity sensitive, because of the construction and material of the regulator contacts. Many aftermarket regulators were made to work on either polarity, so as to reduce stock and unique part numbers

Generator regulators MUST be matched as to amperage because (as Dave said above) the VR limits the CURRENT output of a generator, therefore protects the generator from burning up because of too much output.

"Just like" the Mopar early and late alternators, generator field circuits come in 2 types, called "A" and "B." I no longer remember which is which. One, the field gets power from the armature (output) and the VR controls the ground leg. The other, the VR supplies field power from the BATT

I realize generators "were all we had" but they could REALLY be a PITA

THE ONLY ADVANTAGE I know of a generator, is that "in theory" a car with a dead battery could be "push started" with a generator. Of course most cars cannot be push started, anyhow.....................