Voltages before with the ElectroSport VRR were going progressively lower probably around 13.6, much lower 12.7 or so with fan running before it failed completely. It is my understanding the 28 Amp. tend to run a bit higher than the 40s with the internal VRR. It seems the white wire which controls the field coil is what failed on the original OEM VRR and one leg of the rectifier going open on the ElectroSport one. The Chinese one does regulate and max's at 15.0 which is within parameters of the repair manuals. It's been my experience; although on different bikes overcharging doesn't occur until the voltage achieves 15.5+. Ill keep an eye on it and check for flaring headlight telltale. I keep the bike constantly on a battery maintainer so that may explain it running higher, perhaps it'll drop a bit on a longer ride with the fan running in NJ B to B traffic.