Actually, since the converter can do 15.5ish, you only need the DROK for higher voltages than that. EG, for equalizing certain batteries that need over 15.5v or when 15.5 is ok but it is lower than 80F ambient so the equivalent voltage to 15.5 at 80F is higher when you are doing it.
I wish the PowerMax went to a higher voltage, then you wouldn't need the DROK. I don't know why they put the limit there. The lower limit of the knob on the adjustable goes way below anything that would be useful on a 12v battery (11v or whatever yours does) So you'd think the same amount of knob turn could be better placed in a higher range.
I don't know what those 8v golf car batteries are charged at. Also, when I complained they changed down from the advertised 16.5v high limit to 15.5 (they have a new circuit board from before apparently), they thought maybe it would work better if I got a 24v adjustable.
Anyway, I needed a 12v unit for regular work, so that 24v idea was no use. So in my case, I am stuck at 15.5v and don't have the DROK.
Good idea!
