The most widely used distributed photovoltaic power generation system. It is a photovoltaic power generation project built on the roofs of urban buildings. Such projects must be connected to the public grid, which together with the public grid provides electricity to nearby customers.

The basic equipment of distributed photovoltaic power generation system includes photovoltaic cell modules, photovoltaic array bracket, DC busbar, DC distribution cabinet, grid-connected inverter, AC distribution cabinet and other equipment, in addition to power supply system monitoring device and environmental monitoring device. Its operation mode is that under the condition of solar radiation, the solar module array of the photovoltaic power generation system converts the output of solar energy, and sends it into the DC distribution cabinet through the DC busbar, and the grid-connected inverter converts it into AC power to supply the building's own load, and the excess or insufficient power is adjusted by connecting to the grid