I have no idea. I vape on two Hexohm mods, a home-made parallel mosfet box, two Reo Grands, a Cherry Bomber clone, three iSticks, two Kanger Kboxes, and a 100w Sigelei.
Never really pay attention to the voltage.
On the VV/VW mods I generally vape at low wattage - like a .5 ohm coil under 15 watts. My Sigelei is the only regulated mod that I know is above 15w - it currently has a .4 ohm dual coil build in a Mutation X V3 and I'm vaping that at 35w.
On the Hexohms I just adjust them until the vape is where I want it - I suspect around 25-30w, though I have no idea what the voltage or wattage is.