as i understand, 13.8-14.2 is acceptable rate of charge for a 12v dc battery.
now with that said, would it be possible for the voltage gauge mounted inside the car, to pick up a 14.7v signal from the alternator, but if measured voltage at the battery, to be only 14.2 volts due to voltage drop throughout the system ?
also, how accurate are most aftermarket voltage gauges compared to a fluke meter, which many do not own ? [i own several, but i have never taken the time to compare readings against a parts store gauge]