I have to implement a demand charge block that is based on the maximum demand in a 30-minute interval and then applies the rate 1. x $x per kW for billing period, plus (highest measured 30-minute interval kW demand billing period) 2. y $y per kW of peak billing demand (highest measured 30-minute interval kW demand peak billing period)

How can this be done using EMS? Any other approach?

( This is part of the https://unmethours.com/question/20352/aggregate-peak-and-off-peak-energy-use-in-custom-blocks/ but I think it needs a separate thread.)