1. A system for tracking usage patterns of electrical appliances, the system comprising a central database configured to receive and store information from: a plurality of energy sensors connected to a corresponding one of a plurality of electrical appliances, each of the plurality of sensors being configured to measure a change in electrical energy use by the corresponding one of the plurality of electrical appliances and send appliance monitoring information to the central database, the appliance monitoring information including timing information and power consumption information regarding the electrical energy use; and at least one presence sensor configured to determine when at least one user is proximate to the plurality of electrical appliances and send presence information to the central database the presence information including timing and identification information regarding the at least one user; and a processor configured to interact with the central database to extract features from the appliance monitoring information and the presence information and create at least one user profile corresponding to the at least one user and a pattern of electrical energy use associated with the at least one user based on the features, wherein the features characterize interactions between the at least one user and the plurality of electrical appliances.