I installed the power module that came with the Emlid Navio2. Using the latest image from the Emlid website, and ArduCopter 3.4, I configured the settings per the documentation:
I also am still not getting amps to display. I even tried a new Emlid power module - same result. I tried your work-around by increasing the amps-per-volt factor by 10, and got some small numbers to show up in the 1-4a range, but they fluctuated as you said. Doesn’t seem right.