There's a list of all the multiblock machines found in this mod.
They are configurable (see the configuration file for hints).
Lets you spare wood logs: it can cut logs using his RF-powered saw and outputs planks and woodchips. Later on you can burn woodchips in a furnace, use them as biomass fuel for the generator or do something else (honestly idk what else).
Did you think woodchips are useless? Hehe, wrong. This machine produces energy
by burning biomass. Drop the Woodchips in the top hatch of the machine (hint:
conveyor belts), then fill it with Water (by right clicking on the pressure
chamber access). Now just fire up (literally) the machine by using Flint and
Steel on the top hatch. Now it's up and running.
Keep it running, since once it's stopped you have to fire it up again. The water isn't consumed (for now, maybe going to change). The fuel obviously burns fast, so feed the beast quickly (it has an internal storage of 128 Woodchips).