As a key hub for energy conversion, the efficiency and operational status of photovoltaic inverters directly affect the power generation efficiency and grid safety of the entire power plant. However, the "maximum efficiency" on the inverter nameplate is only the ideal laboratory value, and the actual operating efficiency on site is often significantly affected by multiple factors such as load rate, ambient temperature, and grid conditions. The LX-PE93 inverter comprehensive tester launched by Shanghai LAILX is specially designed for on-site online testing of photovoltaic power plants. It can conduct comprehensive and non-invasive performance evaluation of inverters under normal working conditions of the power plant, providing scientific basis for the refined operation and efficiency optimization of the power plant. On site efficiency analyzer for photovoltaic power plants

The LX-PE93 adopts an advanced multi-channel synchronous sampling architecture. The DC side collects input voltage and current through high-precision current clamps, while the AC side synchronously measures output voltage, current, power factor, and frequency, and calculates the inverter's conversion efficiency, MPPT tracking efficiency, and PR value in real time. The DC voltage measurement range of the equipment covers 0-1500V, and the AC phase voltage measurement range reaches 0-600V. The testing accuracy is as high as ± 0.5% rdg ± 0.2V, which can accurately capture the performance fluctuations of the inverter under different load conditions. The whole machine is equipped with a high-precision wireless irradiance meter and temperature sensor, which synchronously collects ambient light and component temperature. It relies on built-in algorithms to automatically complete STC standard working condition correction, ensuring that test data is not affected by weather changes and providing solid data support for power plant PR value calculation and power attenuation evaluation.

In terms of intelligence and convenience, LX-PE93 is equipped with a 6.5-inch LED high-definition touch screen, supporting bilingual operation in Chinese and English, with clear interface logic. Frontline operation and maintenance personnel can independently complete testing after simple training. The device is equipped with a large capacity lithium battery with a battery life of up to 8 hours, which can meet the needs of all-weather outdoor inspections without the need for external mains power. The host is wirelessly connected to the radiometer and temperature probe, with a maximum transmission distance of 50 meters, completely freeing itself from cable constraints and making on-site testing more flexible and efficient. The device supports network communication and remote Ethernet monitoring, and can transmit test data in real-time to the management platform, achieving remote synchronous testing control and centralized data analysis, laying the foundation for the digital operation and maintenance of large power plants.

LX-PE93 is not only a testing instrument, but also an intelligent terminal for power plant efficiency management. Through the accumulation and analysis of long-term testing data, the operation and maintenance team can establish a health record for inverters, accurately identify potential faults such as IGBT aging, MPPT algorithm deviation, three-phase imbalance, and harmonic exceedance, optimize operation strategies or arrange maintenance in a timely manner, and avoid loss of power generation. The device supports automatic generation and preview export of APP data reports, making it convenient for enterprises to complete archive filing, problem tracing, and project acceptance data organization. Today, as the photovoltaic industry moves towards high-quality development, LX-PE93, with its professional, intelligent, and convenient outstanding performance, is becoming the preferred tool for power plant EPC enterprises, third-party testing agencies, and operation and maintenance service providers, providing strong technical support for the safe, efficient, and stable operation of photovoltaic power plants.

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