The solar modules are connected in series like batteries to generate the final system DC voltage
The solar array current output is routed from the roof to the inverter (normally mounted next to the electrical panel)
The inverter converts the solar array power from a high voltage DC to a clean 120V AC.
The 120V AC flows from the solar meter to a dedicated breaker in your electrical panel.
When your solar system is providing the exact amount of power that your house is currently using, then your electric meter will stand still.
When your solar system is providing more power than your house or business is using, then any excess will flow backwards through the utility meter and you will be building a credit with your utility company.
When your solar system is providing less power than your house is using, then the utility grid will provide the rest; however, your meter will be spinning forward only for the excess electricity that is required.
The complete system requires mounting hardware, wire sizing, junction boxes, grounding equipment, over current protection, DC and AC disconnects and many other accessories. Once installed, your PV system requires very little maintenance, and will produce electricity cleanly and quietly for 30 years and more.