How to estimate the power generation of distributed photovoltaic system?

To estimate the power generation capacity of the photovoltaic power generation system, it is necessary to know the peak sunshine hours (convert the total solar radiation received on the surface of the photovoltaic module into the hours under the irradiance of 1000W/m ‘), the system efficiency, and the system installation capacity.

For example, a 10kW photovoltaic grid-connected system is installed in Beijing. The peak sunshine hours are 4 hours, and the efficiency of the photovoltaic grid-connected system is about 80%. Therefore, the calculation formula of the system‘s daily power generation=module installation capacity x peak sunshine hours x system efficiency=0x4x0.8=32kWh, about 32 kWh