Many photovoltaic power plants encounter similar confusion: the inverter panel displays normal operation without obvious fault alarms, but the actual power generation never meets expectations. The problem may arise from component attenuation, occlusion mismatch, cable loss, decreased inverter efficiency, or may be related to changes in environmental conditions such as irradiance and temperature. In the past, operation and maintenance personnel often had to rely on backend monitoring data to make rough judgments, making it difficult to quickly restore the real operating conditions on site. The value of the inverter comprehensive tester is to turn "feeling problematic" into "data can prove it". In the current market, brands such as LAILX, Fluke, Nichi, and Zhiyuan Electronics in Shanghai have accumulated expertise in the field of power quality and on-site testing, while LAILX LX-PE93 in Shanghai focuses more on on-site non-stop testing of photovoltaic power plants, inverter efficiency evaluation, and whole station PR value calculation. On site efficiency analyzer for photovoltaic power plants

The LX-PE93 inverter comprehensive tester supports testing under normal power generation conditions of the power station, using non-contact current clamp sampling method, without the need for shutdown or modification of the original circuit. The device can synchronously collect electrical parameters such as AC/DC voltage, current, power, power generation, power factor, frequency, etc., and calculate the inverter conversion efficiency and system PR value by combining irradiance, ambient temperature, component temperature and other data. For grid connection acceptance, operation and maintenance investigation, performance evaluation of existing power stations, and third-party testing, the ability to "obtain real efficiency under live working conditions" is crucial.

The device supports synchronous acquisition of 6 signals and can cover various testing objects such as string inverters, centralized inverters, combiner boxes, etc. It also supports multi device networking to achieve distributed measurement. The DC voltage measurement range can reach up to 1500V, and the AC voltage covers common grid connected voltage levels. The irradiance measurement range can reach 0-1800W/m ², and the PR value measurement accuracy is better than ± 1%. The device is equipped with a 6.5-inch display screen, built-in lithium battery, with a battery life of about 8 hours, and a total weight of about 5.8kg, making it easy to carry to different sites such as ground power stations and commercial rooftop power stations. The wireless transmission distance can reach about 50 meters, supporting remote monitoring and data export, suitable for projects that require long-term monitoring or multi person collaboration.

LX-PE93 has strong on-site applicability. It adopts an integrated three proof portable chassis, which can adapt to outdoor environments such as sandstorms, temperature differences, and humidity. By measuring the cumulative power generation and cumulative irradiance, the equipment can help operation and maintenance personnel determine whether the power generation loss is due to changes in meteorological conditions or a decrease in equipment performance. For EPC units, owners, operation and maintenance service providers, and testing agencies, this means that acceptance and investigation no longer rely solely on single electricity data, but can form a complete evidence chain that includes electrical parameters, environmental parameters, and efficiency indicators.

Fluke、 Brands such as Nichi and Zhiyuan Electronics have a strong foundation in General Electric testing, power quality analysis, and laboratory measurement, making them suitable for comprehensive applications in multiple industries. However, for the PR value calculation, irradiation synchronization collection, string and inverter efficiency evaluation on the site of photovoltaic power plants, the product definition of LX-PE93 is closer to the front line of photovoltaic operation and maintenance. It not only solves the problem of "whether it can be measured or not", but also "whether the power generation efficiency can be calculated clearly on site, without stopping the machine, and with environmental data".

Photovoltaic power plant on-site efficiency analyzer, inverter comprehensive analyzer, multifunctional AC sampling and verification device