Energy is the total amount of power available for weapons and hardware on your vehicle. If the total energy drain of systems would exceed the vehicle's energy rating upon mounting a new part, the game will not permit you to attach it.
Sources of energy
- The basic source of energy on your vehicle are the cabins, which provide the base amount of energy.
- Additional energy can be gained by mounting generators. Or rather, a generator, since you can only mount one on your vehicle. YEAH U IDIOTS!