Suggestion: Coal and Coal engines

If there is a rover traveling great distances or carrying a heavy load, there should be a better way to refuel on the go. It would be amazing if we could have another power source similar to reactors, where we just put ingots directly into a machine and it creates power, but have the recource only accessable on planets (< since uranium is more for space).

Using ice or hydrogen as fuel takes up lots of space on vehicles. And lets say you use ice, first you need to find ice, then put the ice in the vehical, then use power (that you may not have if you already ran out) to turn that ice into H2, and then use that H2 to create power. This is where coal would be handy, becuase you dont need space for ice storage and h2o2 generators, big hydrogen tanks, or big solar panels. With coal, it directly goes from the inventory to the engine and creates power.

To prevent coal from over taking other power sources, have two different types coal and make the engines a little bigger then the current ones. Refined coal lasts longer then regular coal (directly from the ground). Small grid engine can be 3x3x3 or larger. Large grid engine can be 2x2x2 or larger. To balance this even more, you can force players to connect oxygen or vents to the engine or make the engine less efficient.