No just no, I'm not sure if you even read the post. Your post wasn't helpful at all because I already knew all this, and normally you'd be right but it's definitely not me turning up the alternator past 15.4 when I've been driving for 30+mins. Sometimes when I start the car the voltage is 12.8, sometimes it's over 16. This is why it helps to give the second bit of information. No need to get defensive. Everything you described sounded like someone that lacked knowledge of how an alternator worked. Had you included the bit about sometimes its 12.8 and sometimes it's over 16 I would have given you a completely different answer. Now as it stands, you get no help from one of the few people that uses a VCM. Good luck.