A method for analysis of energy savings in an electrical network includes obtaining measurements of a plurality of measurement devices linked to loads of the electrical network over a first period of time. A unified signature that characterizes the recorded measurements during the first period of time is calculated. Measurements of the plurality of measurement devices in the electrical network are obtained over a second period of time after introduction of a modification into the electrical network. A unified signature that characterizes the recorded measurements during the second period of time is calculated. The unified signature that characterizes the measurements during the second period of time is compared with the unified signature that characterizes the measurements during the first period of time to calculate energy savings resulting from introduction of the modification.