As says in the OP, Randy has not got his listed yet. To see what it is go to the PowerMax website and find the PMBC or whatever the letters are and go to the PDF blurb for it. It mentions somewhere that the variable voltage is an option.
Without that option it acts like a regular PowerMax unit for its stages. However they do show it has different voltages--14.8vs Randy's 14.6 ISTR. Whatever. They all used to be 14.4 but that was then.
A Carmanah tech here in town told me their Go-Power version would not be getting that variable voltage feature. They switched converters from Iota to PowerMax a couple years ago. He said they are re-writing their manuals to correct some errors left over from when they had Iotas, especially the part about having the IQ4 gizmo, which PowerMax doesn't use of course.
I gather Randy has a shop at his place where he does his own version of the regular PowerMax so that is why you get the "Boondocker" name he invented and some other specs like 14.6 instead of the old 14.4, etc. So now it seems from the OP he will be soon coming out with his version of the Pwhatsit that does have the variable voltage. I hope it also has the little voltmeter on top like my prototype does but if it doesn't, you can just clip your meter's leads to the unit's terminals and read your meter while you twiddle the knob.