Someday I hope that it will be standard for utilities to provide a API that customers can use to calculate the current rates for energy, etc. Today however, we have to do it by hand. My last post was a

You already know I like VTScada as my HMI/SCADA application of choice, and being able to add functions and calculation to tags is another reason I like it. And did you know they have a FREE (as in beer)