Abstract: a system for creating energy from a buoyancy-gravity cycle of a plurality of buoyant containers, cyclically moving sequentially though a liquid buoyancy column and a gravity slide, where a buoyant container captures liquid from a basin at the bottom of the system, is then inserted into the liquid column through a series of coordinatedly openable gates or valves, that maintain the liquid within the liquid column to deposit the volume of liquid into a tank that feeds a hydroelectric penstock and turbine system, to create electricity, while liquid from the tail race returns to the basin at the bottom of the system.