Load curtailment systems and methods track energy consumption information about a site over time. The energy consumption information is used to track power levels and to determine whether an energy surplus or an energy deficit accrues for the site based a predetermined setpoint. A load management system is used to offset the deficit or surplus by charging or discharging energy storage in a manner preventing average power draw within at least a subdivision of a utility billing period from exceeding the setpoint, thereby managing demand charges billed by a utility based on power draw of the site.