An inverter is described, for use e.g. in connection with photovoltaic panels or another renewable energy resource. The inverter comprises: - an input for connection to an electric power source (1.1; 1.2; 1.2; 3); - grid connectors (11) for connection to an electric power distribution grid (7); - a metering device (21) functionally coupled to a sensing circuitry (17) arranged for sensing at least one electric parameter at the grid connectors (11) and configured for measuring said at least one electric parameter; The metering device (21) is integrated with a data transmission arrangement (23).
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