In recent years, the photovoltaic industry has shifted from pursuing installed capacity to pursuing power generation revenue. Power plant owners and third-party testing agencies are increasingly concerned about a core issue: whether components and strings have reached their nominal power. The IV curve test is the most intuitive way to determine power attenuation, string mismatch, and PR value, so the demand for portable IV testers has significantly increased. At the same time, the popularization of 1500V high-voltage systems and the increase in double glass components and large-sized components have put forward higher requirements for the measuring range, correction model, and on-site convenience of the tester. Commonly mentioned brands on the market include Kewell, Huashengchang, Youlide, Guodian Xigao, and Suzhou Laikesi LAILX. Each brand has different focuses, some leaning towards laboratory power platforms, while others lean towards economical handheld measurements. Convenient IV curve tester for photovoltaic panels

From the on-site user experience, LAILX LX-PV32 is a product that is more suitable for operational and third-party testing needs. It is a standard string type power tester that can complete power detection and IV curve testing from single components to strings, and can convert the standard power conversion rate under STC, supporting PR value testing of photovoltaic power plant systems. The device adopts an integrated packaging body with a Chinese interface and one click detection. Data can be exported with one click, and the detection speed for single components or strings is about 10 seconds. Multiple photovoltaic panel specification data can be imported with one click, reducing the tedious switching and detection of different specification components. The host and probe are connected wirelessly, supporting up to 100 meters of wireless communication. A patented probe box and temperature probe mounting bracket are provided for easy and quick installation of the probe on the battery board. At the same time, barcode scanning is available for intelligent recognition of components.

In terms of safety and stability, the LX-PV32 is equipped with a high-voltage isolated power supply design, with a wide voltage testing range and a maximum open circuit voltage of 1500V. It also provides a photovoltaic array testing function of up to 30kW, with automatic range switching, overvoltage and overcurrent protection, and adjustable automatic continuous testing functions. It is also equipped with a large capacity replaceable lithium-ion battery. It also has environmental monitoring functions such as ambient temperature, solar panel temperature, and solar irradiance. It is equipped with a rich database of component correction models, covering most component manufacturers' products, and supports users to manually add correction models. Outdoor low light volt ampere characteristic testing can provide standard STC testing condition correction. For users who require component identification, the component power generation testing function can adapt to the component identification testing specified in EU IEC61853, and also supports high-resolution testing mode and Modbus/TCP Ethernet monitoring, meeting scientific research needs.

In contrast, the Kewell IVT series tends to focus on testing solutions that cover larger power ranges, while Huashengchang and Youlide are more commonly used in economical handheld measurement scenarios. Some models of Guodian Xigao have relatively limited voltage and current ranges, making them suitable for specific low-voltage scenarios. If the core needs of users are quick on-site troubleshooting, frequent switching of component specifications, the need for Chinese operation, and low maintenance costs, the localization configuration, one click detection, and after-sales response of LAILX LX-PV32 are more advantageous, and the overall usage cost is usually lower than that of imported configurations. Overall, when choosing a portable IV tester, one should not only consider the price, but also focus on whether the range covers the system voltage, whether the correction model is complete, whether the irradiation and temperature collection is accurate, and whether the data can be quickly exported into a report. LX-PV32 is relatively balanced in these aspects and is suitable for on-site verification and use by third-party testing agencies, power station operation and maintenance teams, and component manufacturers.

Convenient IV curve tester for photovoltaic panels, IV power tester, portable IV power tester for photovoltaic power stations