The sun is our inexhaustible energy source...

The principle of a grid-coupled photovoltaic system - Structure of a solar power system
The fundamental structure of a PV system comprises of multiple components that all
contribute their part to the overall system. The largest and most expensive components within the overall system are the PV modules - these are connected up into individual strands and form the "generator". Also required is an inverter that converts DC voltage from the PV modules into AC and feeds it into the grid. The modules are fixed to the roof with an assembly system. There is a wide range of different options available here and these must be aligned continually for each individual installation so as to be able to guarantee correct rigidity and permanent hold on the roof.
The interplay between components is critical for the operation of the system and this must be configured by experts. After all, only they know which components work correctly with one another and which ultimately produce the desired result.

In a photovoltaic system with grid in-feed, individual modules are connected up into one or more strands using plug connectors. The DC voltage generated by the modules is converted into 230V AC by one or more inverters. An input meter installed specifically measures every kWh generated and the energy provider (electric utility) is invoiced accordingly.