Of these two methods, integrating photovoltaic arrays with buildings is a common approach, especially with building roofs. Because integrating photovoltaic arrays with buildings does not occupy additional ground space, it is the optimal installation method for the widespread application of photovoltaic power generation systems in cities, and therefore has attracted considerable attention.
So, what are the advantages and disadvantages of building-integrated photovoltaics (BIPV)?
Advantages of Building Integrated Photovoltaics
1. Green Energy: Building-integrated photovoltaics (BIPV) generates green energy, using solar power without polluting the environment. Solar energy is the cleanest and free energy source, and its development and utilization do not produce any ecological side effects. It is also a renewable energy source, inexhaustible and readily available.
2. No land occupation: Photovoltaic arrays are generally installed on idle rooftops or exterior walls, without occupying additional land, which is especially important for urban buildings where land is expensive; summer is the peak season for electricity consumption, which is also the period with the greatest sunshine and the highest power generation of photovoltaic systems, thus playing a role in peak shaving for the power grid.
3. Building-integrated photovoltaic (BIPV) technology uses a grid-connected photovoltaic system, which does not require batteries. This saves investment and is not limited by the state of charge of batteries, allowing full utilization of the electricity generated by the photovoltaic system.
4. Contributes to building energy conservation: Photovoltaic arrays absorb solar energy and convert it into electricity, significantly reducing the overall outdoor temperature and decreasing wall heat gain and indoor air conditioning cooling load, thus contributing to building energy conservation. Therefore, developing building-integrated photovoltaics can achieve "energy saving and emission reduction".
Disadvantages of Building Integrated Photovoltaics
Although building-integrated photovoltaics (BIPV) offers numerous advantages such as high efficiency, economy, and environmental friendliness, and has been applied in World Expo pavilions and demonstration projects, photovoltaic buildings have not yet entered ordinary households, and large-scale residential communities using this technology have not yet emerged. This is due to several major problems with BIPV.
1. High cost: Building-integrated photovoltaic (BIPV) structures are relatively expensive. Buildings with integrated photovoltaic power generation systems are costly to construct, and further advancements in research and technology are needed.
2. High cost: Solar power generation is expensive. The cost of solar power generation is 2.5 yuan per kilowatt-hour, which is double the cost of conventional power generation, which is 1 yuan per kilowatt-hour.
3. Instability: Solar photovoltaic power generation is unstable and greatly affected by weather, exhibiting fluctuations. This is because the sun is not present 24 hours a day. Therefore, how to address the volatility of solar photovoltaic power generation and how to store electricity are urgent problems to be solved.
