Abstract: A system and method for converting potential energy into kinetic energy includes a water body and a water column extending upward from the water body. A buoyant body is shaped and sized to float through the water column from an underwater, bottom end of the water column to a top end of the water column to acquire potential energy. A hoist mechanism is configured to seize the buoyant body at or near the top end of the water column, transport the buoyant body away from the water column, and allow the buoyant body to fall with the cable connected to the buoyant body via the securing member, thereby pulling on the cable and causing a generator shaft to rotate. A transport mechanism engages the buoyant body and carries the fallen, buoyant body to the bottom end of the water column, to begin a subsequent cycle of operation.