The service includes checking the correct operation of the photovoltaic inverter, including taking electrical measurements in the PROSAT laboratory using a dedicated Sonel MPI 540 PV multifunction meter. It is also possible to make documentation of the measurements and other data needed to establish a claim at the inverter manufacturer's service. ATTENTION: It is suggested that a check measurement is carried out on the electrical installation to which the inverter was connected in order to exclude the possibility of damage to another inverter in the event of a faulty electrical installation.