Abstract: A method for managing electricity usage of an electrical system comprises providing an electricity usage budget for the electrical system, the electricity usage budget being associated with at least a desired or predetermined electricity usage in a predetermined time period. Electricity usage in the electrical system is monitored periodically at time intervals corresponding to the predetermined time period. The monitored electricity usage is compared to the electricity usage budget or information associated therewith for the predetermined time period. Finally, electricity use within the electrical system is limited for a predetermined limitation time period according to predetermined rules if the monitored electrical usage is greater than the electrical usage budget for the predetermined time period.