A power control system may include at least one of batteries, a motor, and a data logic analyzer that can interpret certain variable conditions of a transport, such as a tractor trailer, moving along a road or highway. The data can be used to determine when to apply supplemental power to the wheels of a trailer to reduce fuel usage. One example device may include at least one of a power source affixed to a trailer to capture energy from movement of an axle of the trailer, and a motor powered by the power source to operate and provide movement assistance to the axle.