A coal generator is a basic way of producing energy...It's made with 2 regular furnuces, an electric motor, 3 bronze ingots and copper wire formed in the crafting grid.....after adding coal the machine begins to warm up and then outputs energy, slowing reaching a maximum output of 10 can connect a battery box, and other machines, to the generator via the output port on the back.....please feel free to add corrections, photos, and create more articles...even the most basic articles don't exist yet. Please contribute! Although there is a bug with normal coal and your volts window crashes. Use charcoal instead to avoid the crash.