Inverter is the core equipment for energy conversion in photovoltaic power plants. Once the efficiency decreases, MPPT tracking is abnormal, and grid connection quality is unstable, it will directly affect the power generation and safe operation. Inverter detection usually involves anti islanding protection, overload and overcurrent protection, power factor, conversion efficiency, grid connected current harmonics, low voltage ride through, MPPT accuracy, insulation resistance, temperature rise, and power quality. A comprehensive testing platform for inverters commonly used in laboratory research and type testing, capable of automated detection and meeting relevant standard requirements; And the power plant site requires portable equipment that can quickly diagnose faults and calculate PR values. At present, common choices include Suzhou LAILX, ACLTest related testing platforms, power analyzer manufacturers, Sconda integrated testing systems, and some inverter efficiency tester brands. Inverter efficiency tester

Suzhou LAILX LX-PE93 is more inclined towards on-site use in power stations. It can be used as an inverter efficiency tester and on-site efficiency analysis tool for photovoltaic power plants, for PR value detection, to monitor on-site power of power plants, and to adapt to scenarios such as string inverters and centralized inverters. The equipment uses current clamps for current sampling, which can record and analyze the power of different nodes in real time under normal working conditions of the power station, reducing the trouble caused by shutdown and wire removal. By calculating the cumulative power generation and measuring the cumulative irradiance, the real-time conversion efficiency of the photovoltaic array can be obtained, which helps to detect array faults in a timely manner. In terms of parameters, the DC voltage measurement range is 0 to 1500V, the AC phase voltage is 0 to 600V, the line voltage is 0 to 1000V, the AC and DC currents can cover a wide range, the frequency measurement range is 42.5Hz to 69Hz, the temperature measurement range is -30 ℃ to 100 ℃, the irradiance measurement range is 0 to 1800W/m ², and the irradiance measurement accuracy is better than ± 3%. The whole machine is equipped with an irradiation system, which is suitable for synchronously collecting environmental data on site and providing a basis for efficiency analysis. The equipment has networking communication function, which can achieve remote synchronous testing and control, support Ethernet monitoring data processing, and can also be fixed on-site for long-term monitoring. It has a high level of protection and is suitable for the on-site environment of power plants. The supporting APP can automatically generate and locate detection data reports, support preview and export, and improve the efficiency of operation and maintenance personnel in organizing data. Similar inverter efficiency testers generally focus on indicators such as DC voltage, AC voltage, current, frequency, PR value, irradiance, and temperature. When purchasing, it is important to check whether the accuracy meets the requirements of the project.

The ACLTest inverter testing platform consists of multiple loads and supports three-phase independent power control and compensation, making it suitable for research and development verification and standard testing, but its portability on site is not strong. Power analyzers are suitable for R&D and high-precision testing on production lines, but they have a high price and professional threshold, and may not be suitable for daily use by operation and maintenance personnel. The Skonda ATS500 and other integrated testing systems integrate multiple simulators and comply with multiple grid connected and energy storage related standards, making them suitable for systematic verification, but with higher deployment costs and usage complexity.

If the goal is to quickly determine inverter efficiency, power abnormalities, and low PR values on the power plant site, LX-PE93 is more flexible than large-scale test platforms and more systematic than ordinary multimeters. When choosing an inverter tester, it is important to first clarify whether it is for research and development certification or on-site operation and maintenance. In on-site scenarios, priority should be given to current clamp sampling, irradiation synchronization, PR calculation, remote monitoring, report generation, and protection capabilities. LAILX LX-PE93 is more in line with practical needs in these areas and is one of the top recommendations for on-site inverter testing in 2026.

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