Inverters and combiner boxes have become the high-incidence links of photovoltaic power plant accidents

At present, the electrical equipment of some domestic photovoltaic power plants has been in continuous failure after several years of operation. The uneven quality of equipment brought about by the hurried launch of photovoltaic power plants has begun to trouble photovoltaic enterprises, making photovoltaic enterprises "worse."

As the testing center of the entire photovoltaic power station, the inverter is connected to the DC components on the top and the grid-connected equipment on the bottom. Basically, all the parameters of the power station can be detected by the inverter, and it is the key equipment of the photovoltaic power station. Reports released by industry research institutions such as Beijing Jianheng Certification Center and TUV Rheinland Group show that in addition to the controllable factors in the installation process, more accidents of photovoltaic power plants occur in the boost and high-power parts, and the quality problems of photovoltaic power plant components account for 50% of the entire failure rate, and among them, inverters and combiner boxes have become the high-incidence links of accidents.

The "blowout" growth of photovoltaic installations in the past two years has brought about a substantial increase in the demand for photovoltaic modules and photovoltaic electrical appliances. Many manufacturers rushed to the market. In addition, the lack of industry standards at that time resulted in uneven electrical products. Even today, the quality of products in the photovoltaic industry is still uneven, and some manufacturers even start to market when the equipment testing technology and process cannot be successfully completed, which is hard to prevent. The second is that the AC power is small and large. The AC power marked on the nameplate of the inverter cabinet door produced by some manufacturers is 200KW (kilowatt), but the module inside the box is marked with 150KW, which is not in line with the power station. The product does not even have an operating manual, and the failure is unavoidable.

At the same time, the surplus of photovoltaic modules has caused low-price competition, and inverters and other equipment also have such problems, resulting in the continuous occurrence of photovoltaic power station accidents.
Good photovoltaic modules are crucial to the impact of photovoltaic power plants, otherwise the price of component maintenance and replacement will be a lot of expenses. Therefore, friends who need to do projects must learn from reliable manufacturers and make comparisons after on-the-spot inspection.