Rewritten Tesla Style Solar Power Card

For those with Tesla Wall Connectors and using this awesome integration, what’s the preferred method to insert consumption data for the Tesla Wall Connector on one of the appliances?

I just replaced my JuiceBox with a Tesla Wall Connector and was surprised to see it measure three separate phases for Current and Voltage, but not the aggregate watts actively being used.

This person has created a config Value Template or this calculation, but is there a more preferred way to bring this information into the Tesla Style Solar Power Card?