||A factory needs power, and power needs a generator. In comes the biomass generator, cleaning up your lawn and building a better world in one fell swoop!
||~ Caterina Parks's assistant Steve
The biomass generator, as shown on the official site
The biomass generator is a machine that generates power using organic material as fuel.
This machine will likely also use organic material such as wood gathered from trees, and shrubs as fuel. Given the need for automation, there will likely be a way to automate the gathering of this material. Or perhaps as this is only one of several methods of power generation, the lack of an automated input is what drives the search for a better power source.