Yea.. after browsing my kerbalism files/cfgs without finding any thing interesting or changing anything. I though i might just play with this bug and see how far my ship would take me.
Booted up ksp, jumped on my ship, and:
RDU electricity consumption, gone.
Nice, here we go! So next step in my Manned Duna Mission would be docking the Lander.
Lander docked: RDU consumption is back
I left the game to main menu, reloaded the just saved game and: RDU cunsumtion, gone....
So, if anyone runs into Ghost RDU electricity consumtion, reloading helps.