Your Applied Energistics storage system will probably not work without a ME Controller. It is the main part of any ME Network which handles everything like a CPU does in your computer.
The Controller will need power to work. It has its own energy units which will be created inside the machine itself. But you have to supply it with one of the following forms of power:
- Industrial Craft 2 EU's (1 EU = 2 energy units)
- Buildcraft's MJ (1 MJ = 5 energy units)
- Universal Electricty (20 Joules = 1 energy unit)
The Controller has a minimal consumption of 6 units/tick which it needs to function. The indicator on its side shows the current power level. When adding more components to your ME Network the consumption of your Controller will become greater. So bigger networks will need more energy than smallers.
If you can't provide a steady supply of energy it might be useful to disconnect parts of your system when they aren't needed. You can do so using the ME Dark Cable.
Right-clicking on the Controller will open up its interface. It will show you all the components connected to your network and the current use of energy.