1. A method of controlling the operation of a hybrid system that includes both a primary and at least one auxiliary device, both the primary and auxiliary devices being powered by a utility which is in communication with both the primary and auxiliary devices to selectively initiate respective setback operations thereof, comprising the steps of: sending respective setback signals from the utility to both the primary and auxiliary devices to initiate respective setback conditions; and determining the periods of time when the primary device is not operating in a setback condition and operating said auxiliary device in a setback condition during such periods.