How did we suddenly get to 24 volt alternators?? I doubt that feeding 24 volts to a 12 volt alternator will result in it changing to 24 volts. BUT I HAVE NEVER TRIED IT. And I still much prefer the arrangement with a separate voltage regulator. I can replace an external MOPAR regulator in about 3 minutes. For less than $20 (at that time). The last time i checked, for an internal reguator the alternator was replaced about $175 and a half hour's work.

That is an 24V alternator. I said that in my original post. That picture was taken at my workplace where 24V work machines are being made. Obviously you can't use that alternator on a normal car which has a 12V battery.

 

OK, it seems that I lost track of that.