In the refined management system of photovoltaic power plants, inverters serve as the core hub for energy conversion, and their work efficiency and operating status directly affect the power generation efficiency of the entire system. However, the "maximum efficiency" on the inverter nameplate is only the ideal laboratory value, and the actual operating efficiency on site is often affected by multiple factors such as load rate, ambient temperature, and component aging, resulting in significant differences. In order to help power station operation and maintenance personnel accurately grasp the true performance of inverters, Shanghai LAILX has launched the LX-PE93 inverter comprehensive tester. This device can conduct comprehensive online performance evaluation of inverters under normal working conditions of the power station, providing scientific basis for the optimization operation and fault diagnosis of the power station. Inverter detector

The LX-PE93 adopts an advanced multi-channel synchronous acquisition architecture, which can simultaneously measure the complete data of the inverter's DC input and AC output terminals. Its DC voltage measurement range covers 0~1500V, and the AC phase voltage measurement range reaches 0~600V, and it is matched with high-precision current clamps to achieve accurate sampling of large currents. The device is capable of real-time calculation and display of key indicators such as inverter conversion efficiency, power factor, frequency, and PR value, with a testing accuracy of up to ± 0.5%. Through LX-PE93, the operation and maintenance team can easily identify hidden issues such as decreased conversion efficiency due to increased IGBT losses, deviation in MPPT tracking algorithms, power limitation (Clipping) caused by a certain MPPT fault or unreasonable inverter capacity configuration, etc., shifting power station operation and maintenance from empirical judgment to scientific decision-making.

In terms of environmental adaptability and portability, LX-PE93 also performs well. The total weight of the machine is 5.8kg, equipped with a 6.5-inch high brightness LED display screen, and the reading is still clear under strong outdoor light. The device is equipped with a 14.8V high-capacity lithium battery, which can work continuously for more than 8 hours on a single charge, meeting the long-term testing needs in outdoor scenarios without power supply. At the same time, LX-PE93 integrates high-precision irradiance meters and temperature sensors, which can synchronously collect environmental irradiance, environmental temperature, and solar panel temperature, providing reliable environmental data support for accurate measurement of PR values. The device has networking communication function, supports remote Ethernet monitoring and data processing, and can achieve real-time viewing of detection data, automatic report generation, and cloud synchronization through a dedicated APP.

The launch of LX-PE93 fills the professional equipment gap for on-site online efficiency evaluation of photovoltaic power plant inverters. It is not only suitable for daily operation and maintenance inspections, but also the preferred tool for power plant EPC acceptance, annual safety inspections, and third-party testing agencies. By regularly using LX-PE93 to test the performance of inverters in various areas of the power station, enterprises can establish a comprehensive equipment health record, analyze the performance degradation law of inverters, and provide scientific basis for equipment replacement and operation strategy optimization. In the future, LAILX will continue to improve its electrical testing product line, linking instruments such as IV, EL, and thermal imaging to create a one-stop testing solution for photovoltaic stations. With domestically produced comprehensive testing instruments, LAILX will continue to safeguard the electrical operation safety and power generation efficiency of photovoltaic power plants.

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