What is the difference between photovoltaic array installation on building facade and roof installation?

A photovoltaic array is a photovoltaic power generation system. By connecting photovoltaic modules, inverters and related control equipment, the nearby grid can be connected to the grid, and the power generation is stable, which has a significant role in saving land resources and reducing environmental pollution. The development and construction time of photovoltaic power plants in my country is relatively short, but it is developing rapidly. Photovoltaic power generation systems are widely used, not only can effectively use solar energy resources to increase energy supply and improve energy structure, but also save land resources, reduce greenhouse gas emissions, reduce carbon emissions, and protect the ecological environment. Photovoltaic power generation systems have their unique advantages in building facade installation and roof installation.

1. Efficient use of solar energy

Photovoltaic power generation systems can directly convert solar energy into electricity, making efficient use of solar energy and reducing greenhouse gas emissions. The photovoltaic array system installed on the building facade utilizes solar radiation energy to generate electricity, which directly supplies power to the building without electricity sales. Photovoltaic arrays can also reduce fluctuations in grid electricity load and have less impact on the grid. The building itself has high landscape value and can give people a sense of intimacy. Therefore, installing photovoltaic power generation systems on building facades can effectively utilize solar energy resources.

2. Conducive to environmental protection

After the photovoltaic power generation system is installed on the building facade, it will not occupy land resources and environmental capacity. Since the roof is directly formed by the building façade, the number of rooftop solar panels is the largest. The photovoltaic components of the solar panels are also manufactured directly on the building façade. The building facade is not in direct contact with the building, which reduces the cost of building facade renovation, reduces the damage to the environment, and does not have any impact on the building itself, which is good for environmental protection. At the same time, the photovoltaic power generation system uses solar energy for charging, and there is no need to worry about the generation and waste of electricity.

3. The power generation is more stable

The components of the photovoltaic power generation system installed on the building facade are arranged on the same plane, which is very limited by the photovoltaic components. Even if the array is tilted, the power generation efficiency of the system is high due to the very small distance between the photovoltaic arrays. This can happen if installed on a roof: the PV array is installed in a relatively flat location, which affects the amount of electricity generated. If the solar panels are tilted, the power generation will be greatly reduced. Even if tilt does not occur, power generation will be affected. In addition, due to the distance between the solar panels and the roof, when the panels discharge, it can cause damage to the grid. However, the panels get thicker and thicker as they age. If it is not replaced in time, it will lead to greater losses. Therefore, the power generation will be greatly reduced.

4. Low cost of rooftop photovoltaic power generation system

Since the rooftop photovoltaic power generation system does not need any brackets and has no shelter, the roof area of ​​the building can be reduced, thereby reducing the cost of the photovoltaic power generation system. The cost of the rooftop photovoltaic power generation system includes brackets, photovoltaic modules and inverters and other auxiliary equipment, such as fixing brackets, fixing bolts, etc. The price is relatively cheap, about 1%-2% of the photovoltaic power station. The price of solar panels varies according to the number of components, generally less than 1,000 yuan. Usually installed on the roof. Using photovoltaic modules, no special power equipment is required. These components have the characteristics of large power generation capacity, high power, corrosion resistance, and light weight. It can withstand sun exposure and does not require power transmission lines, only the roof can be installed. The cost of solar panels is also low, which is much higher than the cost of land, and the recycling value is high.

5. Renewable energy

Multiple components in a photovoltaic power generation system can efficiently generate electrical energy, such as batteries, battery packs, and so on. Therefore, the comprehensive power generation capacity of photovoltaic power plants is higher than that of traditional power plants, and the power generation efficiency is high. Available for hundreds of years. The advantage of renewable energy generation is distributed generation. It can not only utilize solar energy, but also be used for thermal power generation, wind power generation and other energy sources. The use of these new energy sources will reduce environmental pollution and improve people's quality of life.
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