The Redstone Generator, added by the AvP : Humans module is the cheapest, and the most early game generator players will create. Rather than requiring fuel, it constantly produces a small amount of power.

(Visual Display.)
Redstone Generators upon being placed down constantly produce 16 FE per Tick without any external requirement. Whilst in the early game it can be useful, it ends up being outclassed very quickly.
Any face of the Redstone Generator accepts a cable.
Redstone Generator Recipe.

Any Plastic. - Integrated Circuit. - Any Plastic.
Neodymium Magnet. - Redstone Crystal. - Neodymium Magnet.
Any plastic. - Iron Block. - Any Plastic.