Rooftop solar photovoltaic power generation model

What is rooftop photovoltaic power generation?

1. Introduction Rooftop photovoltaic power generation is installed on the roofs of buildings and directly connected to a low-voltage distribution network; it has the advantages of proximity to the user side, local consumption, and reduction in transmission costs. China’s existing residential building area is more than 700 billion m 2.

How many GWh can a rooftop solar PV system generate?

The annual rooftop solar PV potential was approximately 311,853 GWh, with a corresponding estimated power generation of 49,897 GWh in 2019. 1. Introduction As an emerging renewable energy technology, solar photovoltaic (PV) technology is recognized as an essential option for sustainable energy transformation .

Is rooftop PV the future of solar energy?

In 2020, 127 GW of new PV power generation were installed globally, bringing the cumulative installed capacity to 707 GW. Among the available technologies, rooftop PV is the inevitable trend of the coming decades. Understanding rooftop PV potential is critical for the development and utilization of solar energy.

Are rooftop photovoltaic systems suitable for building roofs?

Their incorporation into building roofs remains hampered by the inherent optical and thermal properties of commercial solar cells, as well as by esthetic, economic, and social constraints. This study reviews research publications on rooftop photovoltaic systems from building to city scale.

How is solar energy generated on rooftops and façades?

In this process, solar radiation on rooftops and façades is simulated first while considering the influences of the surroundings (e.g., neighboring buildings, vegetation, or rooftop obstructions). Based on the simulation results, PV power generation can then be determined with specialized PV models .

How do rooftops affect photovoltaic power generation?

As can be seen from the Figure 6, the photovoltaic power generation of each rooftop is mainly affected by the rooftop area. For selection of rooftops to install PV systems, many factors need to be considered, such as solar radiation, rooftop geometry, rooftop inclination and slope, shadows, etc., depending on data availability.