"In order to access the power interface for a Power generator, you will need to satisfy one of the following conditions:
You are the operator.
You are the commander.
You are the owner, and you have Level 4 'Manage Facilities'.
Your faction is the commander, and you have Level 4 'Manage Facilities'.
Your faction is the owner, and you have level 4 'Manage Facilities'."
Grev is correct. You have to go to each Shield Gen to link it with the CCC. The Power Gens, you just have to be assigned to them and they show when you click the button to manage power, then the button for the city they are in.