Rate calculations of Cost are not enabled in this version of BEMS. Since this Maximum Demand field is only used in Rate calculation of Costs, it is not currently useful.
Maximum Demand is the current value of the maximum KW during the current 15 minute period.
Maximum Demand is optional. It is needed only if your Electric Rate requires for calculating the Cost of Power and you want to calculate Power Costs. It does not show directly on any BEMS display or report. It is shown indirectly only if used in calculating costs.