NOVELTY - The apparatus (106) has a processing unit communicatively coupled to a communication interface e.g. supervisory control and data acquisition (SCADA) interface, and a memory. The processing unit determines operating schedule for a controller (102) of energy storage asset (101) based on optimization process using a mathematical model. The processor controls the interface to transmit the operating schedule to an energy customer for the controller of the energy storage asset and the memory to store the operating schedule for the controller.    USE - Apparatus for determining operating schedule of a controller of energy storage asset operated by an energy customer of a retail electricity supplier to generate energy-related revenue over time period associated with operation of the energy storage asset according to the operating schedule. Uses include but are not limited to a photovoltaic cell, wind generator, diesel generator, fuel cell, gas turbine, diesel generator, flywheel, electric vehicle, hybrid electric vehicle and a wind turbine.    ADVANTAGE - The apparatus determines the operating schedule for the energy asset via mathematical optimization process so as to reduce net energy-related cost to the energy customer over the time period by increasing projected energy-related revenue from wholesale electricity markets in which the energy customer participates. The apparatus accurately determines the revenue earned from economic demand response wholesale electricity markets in an improved manner.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) a method for generating energy-related revenue in connection with operation of an electric rail system    (2) a power control system for controlling energy storage asset associated with an electric rail system.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of an operating schedule determining a system that includes energy storage asset, a controller and energy generating asset.    Energy storage asset (101)    Controller (102)    Energy generating asset (103)    Power line (104)    Apparatus for determining operating schedule of controller (106)