A Qualified electrician will install the eMon Energy for you.
The electrician will install the base unit, its power supply, the Voltage reference adaptor(s) and up to 14 CT sensors. Two electric sockets need to be available near the panel box. If there are no power sockets, the electrician will install those as well.
For three phase installation a power socket on each of the phases need to be available near the panel box. The electrician will install those for you.
The installation does not include a configuration of your system, or local/cloud servers. The online manual will help you with that.