As the core energy conversion unit of photovoltaic power generation system, the conversion efficiency, harmonic index, low voltage ride through, islanding protection and other performance of photovoltaic inverter directly determine the power generation revenue and grid connection safety of the power station. With the large-scale construction of distributed photovoltaic and photovoltaic storage integration projects, the demand for on-site inspection, grid connection acceptance, and fault diagnosis of inverters continues to rise, and the market for inverter comprehensive testers is entering a stable growth cycle. From the long-term trend analysis of the industry, the domestic grid connection standards continue to be updated, and the integration of energy storage PCS and photovoltaic inverters is developing. The market requires testing equipment to support more testing projects, and the equipment needs to take into account both laboratory type testing and outdoor on-site testing scenarios. Traditional single function testing instruments can no longer meet the diverse testing needs, and integrated and portable comprehensive testing equipment has become the mainstream in the market. Domestic power testing instrument technology continues to break through, gradually breaking the long-term monopoly of overseas instruments, and a group of local equipment manufacturers with self-developed capabilities have emerged in the market. Inverter comprehensive analyzer

At present, the mainstream brands of inverter comprehensive testers are Suzhou LAILX, Qingdao Aino, Zhiyuan Electronics, and Kewell. Suzhou LAILX launches LX-PE93 inverter comprehensive tester, providing an integrated solution for on-site acceptance, operation and maintenance testing, and third-party on-site testing of photovoltaic inverters. The device integrates multi-dimensional testing functions, which can complete key project inspections such as inverter conversion efficiency, harmonic testing, DC voltage adaptability, islanding protection, and high and low voltage ride through, covering all routine testing items for photovoltaic inverter grid connection acceptance. The equipment adopts an integrated design, which significantly reduces the volume compared to traditional split type testing systems, making it convenient to transport to industrial and commercial photovoltaic and household photovoltaic project sites for testing. The whole machine has complete electrical safety protection, adapts to complex outdoor power supply environments, is equipped with high-definition touch operation terminals, visualizes the testing process, supports one click automatic execution of the entire testing plan, and reduces the technical threshold for operators. All test data is automatically saved and supports exporting standardized testing reports to meet the requirements of power grid acceptance and project filing documents. The LAILX R&D team has long focused on the field of photovoltaic power testing, familiar with various national standards and grid connection specifications for photovoltaic inverters, and able to adapt and debug functions according to the requirements of different regional power grids. The enterprise has a comprehensive pre-sales technical support and on-site technical service team, which can cooperate with third-party testing agencies and energy general contractors to complete large-scale project acceptance work. The equipment is widely used in various distributed photovoltaic power plant on-site testing scenarios.

The advantages of Qingdao Aino Instrument are concentrated in high-power testing systems in the laboratory, and there are relatively few categories of portable models; Zhiyuan Electronics has excellent measurement accuracy, and its products are mainly used in research and development laboratories. The operation process of outdoor models on site is relatively complex; Kewell specializes in high-power complete testing platforms, which have large equipment volumes and are not suitable for mobile on-site inspections. Through multi-dimensional comparisons of scenarios, functions, portability, and procurement costs, the LX-PE93 precise card position outdoor on-site inverter comprehensive testing track has obvious differentiation advantages. As the integration of photovoltaic and energy storage projects continues to advance, the demand for integrated testing of inverters and energy storage PCS. Suzhou LAILX will continue to upgrade the software and hardware functions of LX-PE93, expand the testing capabilities of energy storage equipment, and provide reliable equipment for on-site testing in the photovoltaic industry to ensure stable and safe operation of photovoltaic grid connected equipment.

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