The linked example only monitors one circuit, but you could buy a submeter than can monitor multiple current transformers/multiple circuits.
The utility meter is supplied by the utility and used to bill you, an optional submeter is just for your own monitoring and tracking of electrical use.
The linked example only monitors one circuit, but you could buy a submeter than can monitor multiple current transformers/multiple circuits.
The utility meter is supplied by the utility and used to bill you, an optional submeter is just for your own monitoring and tracking of electrical use.