NOVELTY - The system (10) has electrical energy storage (EES) modules connected between a power supply (20) and an elevator hoist motor (12). A controller (32) controls the EES modules such that one of the EES modules drives the hoist motor and other EES module charges. The controller changes the EES module that is driving the hoist motor and the EES module that is charging at programmed time intervals. The EES module includes a symmetric or asymmetric super capacitor and a secondary battery e.g. lithium ion battery.    USE - Used for driving an elevator hoist motor in an elevator system during power failure, to move an elevator to the next floor for passenger disembarkation.    ADVANTAGE - The controller controls the electrical energy storage (EES) modules such that one of the EES module drives the hoist motor and other EES module charges, thus supplying power to the hoist motor to provide uninterrupted service in the event that power from the power supply is insufficient to drive the hoist motor, while transporting passengers in-flight. The EES modules provide sufficient power to drive the elevator hoist motor for an extended period of time, and allow elevator service to continue until the power from the power supply is again sufficient to drive the hoist motor. The EES modules provide energy savings by supplementing existing power in the system to account for sudden increase in power requirements and reduce the power drawn from the commercial power utility. The EES modules provide inherent redundancy, fault tolerance, and reliability to the system.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for driving a load from electrical energy storage (EES) modules.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of an electrical energy storage system for driving an elevator hoist motor.    Electrical energy storage system (10)    Hoist motor (12)    Elevator (14)    Power supply (20)    Power converter (22)    Smoothing capacitor (26)    Power inverter (28)    Controller (32)    Elevator car (34)    Counterweight (36)