...if you mention that in the new person's section, you will get about 6 people jump on you and say you are nuts.
If you mention *any* PV in the new person's section you'll get about six people saying you're nuts
Since OP's got an engineering background I figured I'd explain *why* things work so he can make informed decisions
Caution: Math follows - proceed at your own risk.
It's all about watts. If we know that W=V
2/R we can figure out a bunch of this stuff on our own. Let's start out with a standard 3.2v 510-compatible e-cig and a standard 2.5 ohm atomizer.
(3.2*3.2)/2.5= about 4.1 watts. A little wimpy for most but fine for some.
Same carto on a 3.7v Volt battery -
(3.7*3.7)/2.5= about 5.5 watts. Warmer vape, more vapor. This is one reason why a Volt vapes better than a 510.
Okay, this is as good as it gets on skinny batteries as they don't have the reserve capacity to drive low resistance (LR) atomizers - you need something that'll support higher current drain. Let's move up to an 3.4v eGo with a Boge 2.0 ohm cartomizer - a favorite of many here:
(3.4*3.4)/2= about 5.8 watts.
Drop the resistance down to 1.6 ohms and you get
(3.4*3.4)/1.6= about 7.2 watts - this is getting better all the time
My current setup is a 3.8v KGO battery driving a 1.6 ohm EMDCC (eGO Megal Dual Coil Cartomizer) -
(3.8*3.8)/1.6= about 9 watts and a pretty nice vape. Good flavor and good vapor production.
I have a friend using 3 ohm cartos on a 6v mod; 12 watts and I think he's insane, but there are people out there vaping off car batteries I think
There are points of diminishing return, though. Too much voltage across a LR atomizer will pop the atomizer, the increased current drain of LR attys affects battery life, and if the atty runs too hot you can burn juice. Too little resistance against a skinny battery and you damage the battery because it can't stand up to the current drain.
My own sweet spot is around 9 watts or maybe a little better, which is why the KGO/1.6 ohm works for me. The same carto on a 3.4v eGo battery is just *almost* where I wanna be.
So - in a perfect world you want high voltage *or* low resistance and enough battery capacity to support the current drain.
Anyway, that's why things work. There are a few more variables but once you find your sweet spot you should be able to reproduce it at just about any voltage.
Sorry for being long and technical. Hope it helps -