I did some MMW test today using one of the electrolsyers in my truck. I also was testing the current monitor/control circuit.

volts = 14vdc
amps = 40a
pwm = 2 P-channel mosfets
freq = 5khz
duty = unsure ( less than 70 % )
current control = max
stacks = 2
total plates = 13
MMW = 5.86
Lpm = 3.3 Lpm


volts = 14vdc
amps = 26 amps
pwm = same
freq = 5khz
duty = less than 70%
current control = adjusted to see change
stack = 2
total plates = 13
MMW = 6.57
Lpm = 2.35Lpm

Looks like I'm going to get close to my goal of 5Lpm. The current control doesn't work good enough for me yet. It is dry gas, the bubbler is about 2 feet higher than my reservoir with condensing coils. I measured with a homemade flow meter for accuracy and also a commercial flow meter. Going back to the drawing board now to make it better.
Russ