WAILA's UI shows WIreless Connector's power in AE by default and there is no config file for AE2 Stuff (?). I suggest to make WAILA show power in configurable unit. One way to take it is from

\config\AppliedEnergistics2\AppliedEnergistics2.cfg

S:PowerUnit=AE // AE, EU, WA, RF, MK

Sorry about my poor English.

Edit: fixed.

My WAILA handler is showing power use in AE. If you see EU in WAILA then it's some other mod doing something weird.

I do plan to add support for different power unit display in the future.

I meant AE, sorry.

I'm closing this issue as part of a spring cleaning of my issue trackers from old stuff.

If you believe it's a bug that is still relevant in Minecraft 1.12 - Feel free to reopen it.