Abstract: An electrical generating system includes a shaft connected to a pair of electrical generators through unidirectional gear boxes so as to alternatingly generate electricity in the respective generators during oscillating rotation of the shaft. The shaft is rotated by the rise and fall of a pair of tanks connected by a chain trained over a sprocket on the shaft. A reversible pump transfers water or other liquid between the tanks which fall as liquid is supplied to the tanks. Springs beneath the tanks provide a restoring force to provide enhanced efficiency in the up and down movement of the tanks. Thus, each falling tank generates electricity via the rotating sprocket in the respective generators.