You will need a professional license for the real meters from which you calculate the virtual meter and for the virtual meter.
A virtual meter is based on a mathematical formula including the data of one or more physical meters.
Example: Meter A - (Meter B*2) = Virtual Meter C
The following operations can be used to define a virtual meter:
abs() absolute value
To create a virtual meter follow these steps:
Log in to your smart-me account
Click on the top right on "Configuration"
Click on "Virtual meters"
Click on "Add"
Enter the name and the defining formula for your meter