So the developer does not know how to make block entities contain energy or anything.
But here he is, making a mod that messes with FE (Forge Energy).
This mod implements an FE generator that takes oxygen from above it and redstone, as well as an FE powered furnace and freezer. As well as an FE checker, which tells you how much FE a block that can have FE holds currently. Oh and cant forget the FE battery.
Recipes:
