Hidden worries behind the most fiery

2022-08-17
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There are hidden worries behind the "hot PV"

some PV power stations have hidden quality risks

Li Shimin, deputy director of Gansu Institute of natural energy, revealed to me that some PV power stations built during the rush for installation last year had various quality problems. For example, the design of some power stations does not conform to the second standard, the construction quality is poor, and the wind resistance of the system is poor. In addition, there are insufficient component capacity, too fast attenuation, substandard backplane materials, inverter and other product quality problems. However, at present, power station developers do not pay enough attention to this problem, which is a harm to the industry

"g. walking space in the industry: before 950mm (without gripper, special test space can also be customized according to customer needs), there is indeed a phenomenon that the conversion efficiency of components is not high." The relevant person in charge of CGN solar energy development Co., Ltd. said frankly, "we found that the conversion efficiency of many photovoltaic power station components began to decline sharply after 3 to 5 years of use, and some serious power station quality problems such as 10% backplane cracking occurred." Beijing Jianheng Certification Center previously conducted a survey of 32 provinces and cities in China, with a capacity of 3. 425 power stations with 3 gigawatts, including large-scale ground power stations and distributed photovoltaic power stations, have been tested and investigated. The results show that the power stations that have been built for more than 3 years have problems to varying degrees. Including high defect level, serious series and parallel loss, warranty can not be guaranteed, differentiated quality problems, etc

"in recent years, the overheated investment in China's photovoltaic industry, coupled with the low investment threshold, has led to the outbreak of production capacity. Many power station developers use a large number of components with poor quality in order to pursue the cost of investment." The relevant person in charge of Greater China of DuPont electronics and Communications Division said, "the use of photovoltaic modules whose quality is not guaranteed will lead to huge financial pressure on power station developers in the future, and this pressure will appear in 5 to 10 years." Now, with the strong support of national policies, all kinds of domestic capital have entered the field of photovoltaic power stations. With the gradual reduction of subsidies, photovoltaic may usher in a peak period of development in the first half of 2017. With the intensification of market competition, the survival of the fittest in the industry will be accelerated. Given that photovoltaic power stations are capital intensive industries, the construction period of huge capital investment and long payback period, only the quality of photovoltaic power stations can be guaranteed, The subsequent yield can be guaranteed, which is conducive to the healthy development of the photovoltaic industry

how to ensure the construction quality of photovoltaic power stations? Lishimin told that to solve the quality problems of power stations, it is of course necessary to standardize the market and strengthen management from the aspects of design and construction. The quality supervision department should take the initiative to spot check the components sold in the market, such as inverters, and regularly publish or expose the information of unqualified products and enterprises. Relevant associations should also actively organize selection and recommend high-quality products and enterprises to the society

promote the quality, brand awareness and after-sales service of production enterprises

"due to the technical characteristics of photovoltaic modules and inverters, ordinary users are generally unable to detect the product quality, and they need professional testing institutions or qualified research institutes to provide market technical information and serve the public." Li Shimin also said

the past 2016 was of great significance to the photovoltaic industry. Due to the reduction of subsidies, there was a rush to install photovoltaic power stations in the first half of last year, and the photovoltaic industry achieved rapid development. According to the data, the installed capacity of PV in China reached 22 GW in the first six months of last year, exceeding the preset target of 18 for the whole year of 2016. 1 GW. PV increased by 34 throughout the year. 24 GW, an increase of 81. 6%。 Industry insiders told that although China's photovoltaic installed capacity increased rapidly last year, it is worth noting that with the increasing number of ground power stations, some problems also began to surface

enterprises blindly build power stations, which is not conducive to the healthy development of the industry

"in the past two years, some landowners and fish farmers have directly called us to ask us whether we want to build photovoltaic power stations on their land and ponds. In some places, enterprises blindly invest in the construction of photovoltaic power stations." A photovoltaic power station investor said that during the rush to install power stations last year, in addition to the rush to install power stations by energy enterprises, even funds from steel, real estate and other industries rushed into the photovoltaic power station installation market

this is not conducive to the healthy development of the photovoltaic industry

due to the impact of economic downward pressure, some traditional industries have poor benefits, while the income of photovoltaic power generation projects is relatively stable. Many enterprises regard photovoltaic power generation as a "haven", coupled with the reduction of photovoltaic subsidies, the photovoltaic industry developed too fast last year

photovoltaic East makes the world see for the first time that PPC can be industrialized, and the acceleration of its progress is a good example. Data show that in the first quarter of 2016 alone, the installed capacity of photovoltaic power generation in East China, central China, North China and South China totaled 25.6 million KW, exceeding 23.64 million kW in the northwest region. Due to the launch of a large number of photovoltaic power station projects in the central and eastern regions in the short term, the main business revenue of large paper enterprises has increased, and the site resources are tight. The land prices of some photovoltaic power stations have doubled, and the annual rent per mu of land has even soared to more than 1000 yuan

it is understood that the current photovoltaic subsidy gap has been large. With the continuous expansion of the scale of photovoltaic power stations, the subsidy default gap is bound to further expand. For the capital intensive industry of photovoltaic power station, there is an average of about 70% loan financing at present. The delay of subsidy funds will increase the financial costs of power station enterprises, erode profits, greatly hinder their sustainable development, and even fall into the crisis of capital chain fracture. Once the terminal photovoltaic power station has no money, it will gradually transmit to the middle and upper reaches of the industrial chain, and finally form the industrial chain. There is a triangular debt phenomenon among power generation enterprises, equipment enterprises, and parts enterprises, which has seriously affected the normal operation and economic benefits of enterprises, It indirectly increases the cost of renewable energy power generation, which has a great negative impact on the whole photovoltaic industry. The development of photovoltaic industry urgently needs "sunshine"

the quality, power generation, yield and value of photovoltaic power stations are closely related to the quality of component systems

it is understood that in the whole photovoltaic industry chain, photovoltaic module manufacturers have sprung up in recent years due to the low technological threshold, low investment and short construction cycle of components and batteries. At present, there are more than 400 photovoltaic module production companies in the industry. The quality of each component manufacturer is uneven, and the price is also very different. Especially, as the core equipment of the photovoltaic system, the quality of the photovoltaic inverter is directly related to the operation quality and service life of the power station. However, the quality level of domestic inverter is still worrying

the announcement of 2015 national supervision and random inspection of product quality issued by the General Administration of quality supervision, inspection and Quarantine of the people's Republic of China shows that the qualified rate of random inspection of photovoltaic inverters is less than 80%. A total of 55 batches of photovoltaic inverter products produced by 55 enterprises in 13 provinces and municipalities including Beijing, Hebei, Shanghai, Jiangsu, Zhejiang and Anhui were spot checked

it is learned that during the rush to install last year, the supply of photovoltaic module products fell short of demand, and the orders of photovoltaic module manufacturers were almost saturated. During this period, many module manufacturing enterprises were working overtime and the supply of products fell short of demand. In this state, not many manufacturing enterprises will consider technological progress, improve conversion efficiency, reduce costs and increase reliability. Nowadays, behind the vigorous development of photovoltaic industry, the quality and service life of components have become an urgent problem for the whole industry

Li Shimin said that in order to promote the healthy development of photovoltaic industry, the evaluation standard and system of photovoltaic module product quality must be further optimized. When the technology reaches a certain level, the standard must be continuously improved, forcing the quality to be continuously improved

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