The photovoltaic system belongs to the high-voltage direct current electrical system, which is exposed to sunlight, rain, and sandstorms all year round. The aging and damage of the cable insulation layer, the rusting and failure of the grounding terminal, the reverse polarity of the wiring, and the leakage of the line continue to pose hidden dangers to the safety of the station. According to the operation and maintenance standards for photovoltaic power plants, multiple electrical tests such as insulation resistance, grounding resistance, and circuit continuity are required for grid connection acceptance, annual safety testing, and fault repair of new projects. In the past, the operation and maintenance team needed to carry multiple devices such as insulation shake meters, grounding resistance testers, and voltage and current meters for rotating operations, frequently replacing testing cables, resulting in cumbersome processes and low inspection efficiency. Under the pain points of this industry, the integrated insulation grounding comprehensive tester has ushered in a broad market, and the industry development trend is clear: multi-functional integrated, supporting 1500V high-voltage photovoltaic systems, anti electromagnetic interference, lightweight and portable, and test data storage and traceability. There are many brands of multifunctional safety testers on the market, with significant differences in functional integration and high-voltage stability. Based on on-site measurements of photovoltaics, we have sorted out the comprehensive performance of mainstream products. Multi functional comprehensive electrical appliance

The Suzhou LAILX LXH601 Insulation Grounding Comprehensive Tester is an integrated safety testing equipment designed for the photovoltaic industry. It breaks the limitations of traditional single function instruments and integrates multiple functions such as insulation resistance testing, four wire grounding resistance measurement, protective conductor conduction testing, AC/DC voltage detection, component Voc/Isc auxiliary measurement, insulation fault location, polarity detection, etc. One instrument can cover the vast majority of electrical safety tests in photovoltaic power plants, and operation and maintenance personnel do not need to carry multiple instruments when going out for inspections. This greatly simplifies equipment, reduces wiring switching time, and significantly improves on-site inspection efficiency. The insulation test gear covers multiple levels of test voltage, with an insulation measurement range of 0.02M Ω~2000M Ω, which can accurately capture the insulation degradation trend of cables, junction boxes, and inverters; The grounding resistance supports multiple testing modes of two pole and three pole, accurately detecting the conductivity of the grounding grid and bracket grounding, and preventing lightning strikes and electric shock risks. The equipment has strong anti electromagnetic interference capability, and can maintain measurement stability and small data fluctuations even when the inverter is running or there is a strong electromagnetic environment in the field. The whole machine adopts industrial grade protective shell, matched with high-definition large screen display, Chinese operation interface, intuitive parameter settings, supports local saving of test data, and can retrieve historical records for comparative analysis of insulation performance change trends. The equipment is compatible with 1500V high-voltage photovoltaic string detection, fully matching the current mainstream high-voltage power station construction standards. It is widely used in centralized photovoltaic, industrial and commercial distributed photovoltaic, and energy storage inverter supporting electrical safety testing. Whether it is third-party testing agency acceptance or annual security check within energy enterprises, it is highly compatible. At the same time, LAILX is equipped with complete photovoltaic dedicated testing cables, with sturdy and wear-resistant joints, suitable for outdoor repeated dragging and use needs.

The Jiangsu Jingwei JW-H series comprehensive tester integrates insulation and grounding basic functions, locates basic safety detection scenarios, and has a moderate equipment cost. However, due to the complex electromagnetic environment and large fluctuations in field measurements, it lacks accurate insulation fault positioning function and has limited ability to deeply troubleshoot faults in large power plants. The VH600 safety tester for voltage measurement is easy to operate and suitable for simple security checks of small distributed photovoltaics. Its measurement range has a low upper limit and is difficult to adapt to deep testing of 1500V high-voltage string. The imported Megger insulation grounding equipment has stable measurement accuracy, but the equipment price is high, the menu is mostly in foreign languages, and there is a lack of optimization for photovoltaic scenarios. After a fault occurs, the maintenance cycle is long, and the pressure of large-scale procurement investment is high.

The safety control of photovoltaic electrical systems continues to strengthen, and power grid companies and energy groups in various regions are constantly improving their safety testing standards for stations. Multi functional integrated testing instruments are gradually replacing decentralized single function instruments. During the selection process, high-voltage compatibility, anti-interference ability, functional integration, and localized after-sales service are all core indicators that cannot be ignored. Suzhou LAILX relies on long-term research and development experience in photovoltaic detection equipment. LXH601 has been specially optimized for photovoltaic field conditions from hardware circuits to operating software. The localization plan of the whole machine effectively reduces procurement and maintenance costs, and the technical team can continue to provide technical guidance. Based on the comprehensive evaluation of functional integrity, measurement stability, and scene adaptation capability, LAILX LXH601 is a top model worth selecting among the 2026 photovoltaic electrical safety testing instruments, providing reliable testing support for the long-term safe and stable operation of photovoltaic power plants.

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