The VV V3 is listed as a 3.5 Amp limit but it doesn't actually seem to hit this except when firing coils below 1.2 Ohms. It will deliver just under 3.5 Amp to them and no more, down to the resistance where it will no longer fire at all. In practice, with coils above 1.2 Ohms or so it seems to sit at about a 2.25 to 2.5A limit even when set to max V or W. (See review and testing by Pbusardo). I confirmed this today with my own, as I noticed no difference between 8 and 11 Watt settings with a 1.6 Ohm coil. Turns out, 8 Watts with a 1.6 Ohm coil puts me right around the 2.5Amp-ish cutoff.
I have heard that to get the best performance out of the VV V3 you should use coils between 1.8 and 2.2 Ohm. My experience reinforces this idea.