The 'energy measuring sensor with external sensor' is used to record the solar energy converted in the PV inverter and then transmit it to the room manager with 'energy management function' for display. This type of device is used for larger outputs of 15 W-23 kW. Current, voltage, active power and electrical energy are determined. The external sensor of the energy measuring sensor is plugged into the electrical system via the output cable, preferably at the feed-in point. The device is installed in the switch, junction or installation box. The device is not calibrated and therefore not suitable for billing purposes!