My results for the fin:
All test results are powered over POE, see my post here for details. I have 300 ft or 91.44 meters of cat6 cable between the device and the supply switch. Measurements at made by an inline POE power draw meter. Room is temp controlled to around 70 degrees. (This matters a lot) The CPU temp is always 84.9 for the stress tests. (That’s the temp it thermal throttles at.)
The fin is powered directly by the 24.23v power by connecting the POE header pins to the phoenix jack directly. Which after line drop is 23v at the device. The fin then steps this down to whatever it needs.
Test idling:
With my container running nothing but:
python3.6:
-time.sleep(10000000)
-maintianing a wifi connection
-nothing else plugged in
-status LEDs and HDMI turned off
-RGB led set to a power of 20 on one color only
I draw about 4 watts of power at the switch. CPU temp around 54 C
Test cpu LOAD:
-same as above but below running
stress --cpu 4 --timeout 300
draw:
Around 6 watts with .15 watts variance, temp max (84.9 C)
Test adapters:
-3 wifi adapters plugged in via USB
Draw:
Around 7.2 watts
Test adapters plus cpu stress:
Draw
Around 10 watts plus or minus 1 watt, starts higher at 11, then drops to 9.5 when it starts thermal throttling.
My results are not scientific! Your mileage may vary! I promise nothing!
This is probably why the spec sheet says 12.5-watt power supply is recommended. 
-Thomas