Just installed my new JS alternator 425amp in my truck which was at night and it looked good. I was sitting roughly at 14.6v-15.1v at idle but the next day when it warmed up a bit it was fluctuating like crazy (10.6v-14.9v) and later in the evening when the sun went down and was a lot cooler the voltage was steady like when I initially installed it. My truck has a RVC system and I’m curious if that has anything to do with it, anybody come across this issue? Thanks in advance