Scale of solar PV systems

Photovoltaic systems are generally categorized into three distinct market segments: residential rooftop, commercial rooftop, and ground-mount utility-scale systems. 

Rooftop

A small solar PV system is capable of providing enough AC electricity to power a single home, or even an isolated device in the form of AC or DC electric. 

Building-integrated

In urban and suburban areas, photovoltaic arrays are commonly used on rooftops to supplement power use. Often the building will have a connection to the power grid, in which case the energy produced by the solar PV array can be sold back to the utility in some sort of net metering agreement.

Utility-scale

Large utility-scale solar parks or farms are power stations and capable of providing an energy supply to large numbers of consumers. Generated electricity is fed into the transmission grid powered by central generation plants.