Here you will learn how to calculate the annual energy output of a photovoltaic solar installation. r is the yield of the solar panel given by the ratio : electrical power (in kWp) of one solar panel divided by the area of one panel. Example : the solar panel yield of a PV module of 250 Wp with an area of 1.6 m2 is 15.6%.
A photovoltaic system with a size of m² would have a nominal power of kWp. W stands for watts, kW for kilowatts. The p at Wp and kWp means 'peak'. Wp and kWp are the units for the nominal power. This is the power of the system at Standard Test Conditions. The surface area is given in square centimeters (cm²) and square meters (m²).
Potential PV panel area at micro level was calculated using 2 installation methods. The spatial distribution of solar PV power generation was obtained. Rooftop photovoltaic (PV) power generation is an important form of solar energy development, especially in rural areas where there is a large quantity of idle rural building roofs.
We know the required Total Output Power is 1000 Watts (10 panels x 100 Watts), the Solar Irradiance for a surface perpendicular to the sun’s rays at sea level on a clear day is about 1000 Watt/m 2 and the Conversion Efficiency is 18%. Plugging these number in the above equation we get: 1000 Watts = Total Area x 1000 Watts/m2 x 0.18 or
Even though the quantity of solar radiation is relatively small, it still generates more total power. When we only considered the PI method, the maximum rooftop solar PV power generation of a single building in Village A was over 40,000 kWh, with an average of 16,900 kWh. Fig. 19.
If you have the result1000kWh/kWp out of PVGIS you have the annual energy production per installed kWp. If you want to know more about the necessary area then you can estimate 8m²/kWp to 6m²/kWp for PV systems. The range depends on the used technology (thin film to high efficency modules).