Common sense of consumption of the hottest photovo

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PV parallel inverter consumption common sense

PV parallel inverter is a special device that inverts the DC electric energy generated by the photovoltaic array (photovoltaic cell/module) photoelectric effect (solar energy is converted into electric energy) into AC energy and then integrates it into public electricity. Different from conventional inverter products, it can follow the changes of sunshine conditions to the greatest extent, and maintain the best power conversion efficiency and power output characteristics. It can be divided into three categories: photovoltaic parallel micro inverter, series inverter and centralized inverter, and its application scope covers the field of large-scale ground photovoltaic power stations and distributed photovoltaic power generation applications (solar complementary street lighting, household roof photovoltaic power generation, photovoltaic agricultural power irrigation, etc.). There are many product styles, which can be divided into indoor and outdoor products. The products have different shapes to deal with different application environments. At the same time, their output power ranges from dozens of watts to hundreds of kilowatts, even megawatts, to meet different application needs

photovoltaic parallel inverter is one of the essential core devices in photovoltaic power generation applications. The efficiency and annual power generation of a single photovoltaic power generation project are directly related to the quality of the product. At the same time, it is also the core device for the safe operation of photovoltaic power generation. In daily application, products with different power levels and types can be selected according to the different functions of the products, so as to meet the purposes from household power generation, industrial and commercial distributed power generation, and then to the special photovoltaic power station power generation of power production enterprises

II. When purchasing a photovoltaic parallel inverter, you should first pay attention to the identification on the packaging box and products, and identify the input voltage range, voltage type and maximum input current of the photovoltaic parallel inverter; Output voltage grade, voltage type and frequency; Maximum continuous working current, maximum output power, and inverter efficiency. Secondly, check the main functions of the Jinan assaying change experimental machine of the product, such as changing torque, digital display of angle, angular displacement sensor (photoelectric encoder) for angle measurement, automatic correction of angular displacement of torque sensor, peak holding, overload protection, stiffness calculation, result printing, data query and other functions. The random data of manual loading should be complete, The accompanying data shall at least include the following contents: detailed product introduction (including technical parameter description), product installation instructions, operation instructions and maintenance instructions, etc

as a general industrial product, photovoltaic parallel inverter products are recommended to be used by non professionals under the guidance of professional technicians. After purchasing products, non professionals should carefully read the product instructions and other accompanying documents, and install and use them in strict accordance with the requirements of the accompanying documents. If in doubt, they should contact the manufacturer or manufacturer to ensure correct installation and use

when purchasing products imported from abroad, it is necessary to pay attention to whether the foreign products declare the requirements of applicable domestic standards. At present, the current effective domestic product standard is nb/t technical specification for photovoltaic power generation and inverter, especially whether the output voltage and frequency of foreign products match the domestic public power points connected to the products. In addition, it should also be noted that there are obvious differences between the requirements of overvoltage and undervoltage protection implemented by foreign products and domestic standards. The use of foreign products will lead to product misoperation or refusal to operate, and there are potential safety hazards. It is not recommended that non professionals choose foreign imported products

when professionals choose photovoltaic and inverter, in addition to the maximum conversion efficiency marked on the product nameplate, they also need to pay attention to the maximum power point tracking efficiency of the product, as well as the power quality condition (such as output harmonic, DC component, etc.) when the product operates at medium and low power (50% rated output power and below), as well as its overvoltage/undervoltage protection parameters. The selection and use of products should be differentiated according to different use environments. For example, household products should pay attention to the electromagnetic compatibility and noise indicators of products; Conventional products are suitable for installation sites with an altitude of no more than 1000m. Products used in high altitude areas should be used with reduced capacity; The temperature range of conventional products is -25 ℃ - +60 ℃. For products used in extreme low and high temperature areas, attention should be paid to the adaptability of the product to the climate and environment, and sufficient safety margin should be reserved for the normal use of the product

III. maintenance

the service life of photovoltaic inverter is generally 5-10 years. If it is not properly used and maintained, it will seriously shorten the service life of photovoltaic inverter, and even bring hidden dangers of good electrical insulation of safety ABS

first, it must be found by professionals that when heating wood flour, we should determine the technical parameters and indicators of the products to be purchased according to the use needs, and then it should be installed by professional technicians, and the products can be connected to electricity and put into use after being approved and accepted by the local power department

during daily use, it is necessary to regularly check whether the input and output terminals of the product are firmly connected, whether the input and output wires and cables are aged or scratched, and whether the grounding wire is firm, broken or fallen off. If any problem is found, it should be replaced by professionals. Do not arbitrarily remove the input and output terminals and their protective covers (if any), and avoid exposing the metal live parts of the input and output terminals

in daily use, in case of inverter operation failure, immediately disconnect the connection protection switch with electricity, and ask professional personnel to eliminate the failure before starting the inverter again

the maintenance operation of the product should be completed by professional technicians. Before any maintenance work, first disconnect the photovoltaic and the electrical connection between the inverter and the electricity, and then disconnect the electrical connection on the DC side. Wait for at least 5 minutes until the internal components are discharged. Welcome to our factory to discuss and study the maintenance work

non professionals should not disassemble the product shell. Professionals should abide by the warning signs on the product, wear anti-static gloves to avoid unnecessary contact with the circuit board, and pay attention not to directly contact the power devices and heat dissipation devices of the inverter with bare hands. The product still has a high temperature for a period of time after power failure, so they should avoid scalding

during daily use of the product, the product should be in a well ventilated environment. Clean the product surface and dust accumulation at the air inlet and outlet (if any) with a clean and soft dry cloth regularly to maintain good heat dissipation of the product. The repair and maintenance of the disassembled shell of the product is not recommended to be operated by non-technical professionals

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