Examples described herein involve modifying power consumption based on energy usage messages. A method includes a CPU periodically receiving energy-usage messages from components. From the energy-usage messages, the CPU determines a plurality of historical energy-usage patterns that indicate respective historical energy consumption of a given component while operating in a given operating state. Then, the CPU determines that overall power consumption of the one or more components differs from an expected power consumption. Thereafter, the CPU identifies at least one differing component that is causing the power consumption differential based on the historical energy-usage patterns and a plurality of new energy-usage messages received after the plurality of historical energy-usage patterns were determined. The CPU then causes the at least one differing component to modify an amount of energy that the at least one differing component is consuming.