A system includes a hybrid drive system having an internal combustion engine and a non-combustion motive power source. The system includes an energy storage system and a controller. The controller is structured to functionally execute operations to improve an efficiency of they hybrid drive system. The controller interprets duty cycle data, a boundary condition, and an optimization criterion. The controller further elects a load response operating condition in response to the duty cycle data, the boundary condition, and the optimization criterion. The controller adjusts the operation of the engine and/or the motive power source in response to the elected load response operating condition.