Technical data

Basic functions for a grid-connected inverter
All inverters for grid-connected systems have at least the following core functions:
 Transformation / DC-AC Conversion
To transform the direct current produced by the photovoltaic generator into alternate current and adapt it
to the voltage level of the electrical grid for input into the grid.
 Automatic adjustment of the working point by MPPT algorithm
To harvest the maximum available energy from solar radiation by adjusting the operating point on the
power curve typical of the PV generator to make it work at the maximum power point MPP (Maximum
Power Point). The maximum power point tracking function from the inverter through a special algorithm
is called MPPT
Protection and interface device for injecting electricity into the grid in compliance with current legal
standards
Function of monitoring the electrical parameters of the grid, to which one or more electromechanical
relay switches are interlocked. These relays allow galvanic separation of the inverter from the grid
according to the national legislation/norms. It is not mandatory that these functions are integrated with
the inverter, nonetheless all manufacturers offer products which are including the above mentioned
protections and interface device (especially for small inverters).
Energy conversion to alternating current