Engine Modules

Engines are modules in Steve's Carts that power minecarts, enabling them to move along their tracks unaided.

Coal
If a minecart is mining coal, it will refill its fuel slot with coal if there is space available.

Solar
The solar engine can only run during the day while it has a clear view of the sky. Rain or snow do not affect their ability to work. During the night or while underground, however, the minecart will need a coal engine as a power source.