Charcoal Combine
A machine that produces charcoal pellets from green grass on a continuous basis, using solar power. It is a Slow Solar Operation vehicle, where burn heat dries the grass clippings. In winter harvest this is easier with dry grass, such that no energy needs to be used for dehydration. Design is for wet biomass, where solar power activates initial drying, and once enough fuel is produced, the process becomes self-sustaining for continuous production while the sun is shining. The most favorable implentation would be in conjunction with Slow Solar Operation, such that this process relies completely on renewable energy.
The use case is producing 'infinite range between fueling' via on-demand production of fuel from harvested resources, with wide-ranging applications.