Market status of solar roof plan
Solar roof is to install solar power generation device on the top of the house, and use solar photovoltaic technology to generate power in the urban and rural construction field, so as to achieve the goal of energy conservation and emission reduction. The launch of photovoltaic applications is driven by policies, which is a global consensus. In order to implement the goal of global energy conservation and emission reduction, and strengthen the policy support strategy for new energy economy, many governments have launched solar roof plans.
There are two current technical routes for installing solar power generation systems on roofs: BAPV and BIPV. BAPV, that is, the traditional way to install photovoltaic modules on the surface of existing buildings for power generation; BIPV, namely PV building integration, is a technology that integrates solar power generation products into buildings. PV itself is a part of buildings and has the functions of buildings and power generation.
Source: Baidu Pictures
In fact, the international market has been pursuing the solar panel for a long time. As the most promising renewable and clean energy in the 21st century, solar energy has already attracted the attention of the international market.
Solar energy has become one of the most competitive power sources in the EU. If solar energy capacity is combined with improving energy conversion efficiency, European citizens can be greatly protected from the impact of oil fuel price fluctuations. Therefore, the EU proposed to complete large-scale photovoltaic deployment quickly through the European solar roof plan through the solar energy strategy.
The EU is expected to meet nearly 25% of the power consumption by building photovoltaic on the roof, which is more than the share of natural gas today. The European solar roof plan aims to release the solar power generation potential of the underutilized roofs and make European energy cleaner, safer and more affordable. In order to achieve this goal quickly, the EU will take immediate action before the end of 2022.
In order to encourage people to use solar power, Japan requires that new residential buildings in the Tokyo Metropolitan must be installed with solar panels from April 2025. This is the first regulation in Japan for new individual residential buildings. The Tokyo Metropolitan Government also plans to effectively use a large number of building roofs to vigorously develop solar power projects to reduce household carbon emissions. According to the new system, the owners of large residential buildings, such as buildings and apartments, and one household with less than 2000 square meters are obliged to install solar panels on the roof. According to the statistics of Tokyo Metropolitan, about 50000 new residential buildings are built every year. Tokyo expects that 2800 of them will meet the conditions for installing solar panels. It is calculated that after the implementation of the new system, the solar power generation capacity that can be increased is 40000 kilowatts per year.
Until 2016, there was almost no solar power generation equipment on the roofs of China. However, since then, China has installed solar power generation equipment with a total installed capacity equivalent to 12 to 25 nuclear power plants every year. Due to the mixed quality of China's photovoltaic enterprises, the Ministry of Science and Technology and the Ministry of Industry and Information Technology appear to be powerless on the "roof plan". It is difficult for China's photovoltaic industry to use the "roof plan" to improve the technical level in an orderly and healthy manner, so as to produce high-quality photovoltaic products. However, due to government subsidies, it can now cover about 30% - 50% of the production costs of relevant enterprises. Its support is unprecedented, which will greatly reduce the cost of solar photovoltaic power generation and help promote the use of solar photovoltaic technology. At this stage, China is actively promoting the integration demonstration of photovoltaic buildings such as solar roofs and photovoltaic curtain walls in large and medium-sized cities with developed economies and good industrial foundations; The year 2020 is also the year when our country enters the era of a moderately prosperous society in all respects, and also the year when poverty alleviation and rural revitalization are effectively linked. It is obviously reasonable to achieve the goal of boosting rural revitalization by promoting rural household photovoltaic to form stable income. Actively supporting the development of off grid power generation in rural and remote areas and implementing relevant regulations such as power transmission to the countryside point out the direction for the application of solar energy technology.
Taking the integration of solar roof, photovoltaic curtain wall and other photovoltaic buildings as a breakthrough may show people many benefits of solar energy application in the short term, which is also conducive to large-scale promotion in the future and stimulate the enthusiasm of industrial capital to invest in solar energy.
Although many families and office buildings are actively responding to the solar roof plan, its coverage is relatively low, because the investment in installing solar panels is relatively large. For some families, the cost of installation may be considered, and they will not accept it. In addition, such solar panels are directly installed on the roof. When installing, they also need to drill holes on the roof to penetrate the roof, If the installation is not reasonable in the later stage, it will cause leakage, corrosion and other problems on the roof. In addition, after all, solar panels are obtained through solar energy. Only solar energy resources can generate electricity, so they can be used when the weather is sunny. For countries or regions with underdeveloped lighting, or when the weather is overcast or the sun is not particularly sufficient, power consumption will be affected.
