Explains electric demand charges and describes ways to save money by reducing demand charges. Demand charges are based on peak amounts of energy used in a given time period, known as demand intervals. Demand charges are usually 30 to 70 percent of the total electricity bill. Demand charges can be reduced by scheduling some activities (such as irrigation that requires electric pumps) at night rather than during high-demand periods. Federal facilities must have load-reduction plans that will allow them to reduce their electrical demand temporarily when an electric utility asks them to do so, based on a July 2000 letter from the Secretary of Energy. Internet links to additional information are included.