CIRWATT B is a multi-function digital single-phase meter, Class B in active energy and Class 2 in reactive energy. The meter complies with European legislation related to energy meters (MID) EN 50470-1 and EN 50470-3, which approves the installation of these meters in any country of the European Union. It includes PLC (Power Line Carrier) Communications through power cable and an optical communications port. Both use IEC-61870-5-102 protocol. In addition, it can display information in case of power loss just pressing the button, it can store up to 6 channels of energy registers with 3 months of hourly load profile and it can limit maximum power consumed by end-user, through an internal disconnection relay which can be remotely managed using PLC communications.