Jiangsu Jingwei JW-F04 Portable Irradiance Meter: Accurately Capturing Light Energy Data and Evaluating Photovoltaic Efficiency as the ‘Golden Standard’

May 21, 2026
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Jiangsu Jingwei JW-F04 Portable Irradiance Meter: Accurately Capturing Light Energy Data and Evaluating Photovoltaic Efficiency as the ‘Golden Standard’

As the core energy source of photovoltaic power generation, the instantaneous value, cumulative amount, and distribution characteristics of solar irradiance directly determine the efficiency of photovoltaic module generation, the accuracy of power plant generation prediction, and the accuracy of system performance ratio (PR value) calculation. High precision and portable irradiance measurement equipment is indispensable in the refined operation and maintenance, power generation evaluation, and site selection planning of photovoltaic power plants. Jiangsu Jingwei Technology Co., Ltd. relies on optical sensing and intelligent calibration technology to create the JW-F04 portable irradiance meter with exquisite craftsmanship. With a second level standard measurement accuracy, lightweight and portable design, and multi parameter synchronous monitoring capability, it provides accurate data support for photovoltaic system light energy evaluation, efficiency analysis, and operation and maintenance decision-making. Portable irradiation system dosimeter


The JW-F04 portable irradiance meter is a high-precision environmental monitoring device developed specifically for photovoltaic system light energy measurement. The core adopts a secondary standard spectral response sensor and multi-channel optical detection technology, accurately matching the distribution of the solar spectrum, effectively avoiding environmental light interference, and ensuring accurate and reliable measurement data. The device can synchronously measure four core parameters: total solar irradiance, scattered radiation, reflected radiation, and planar effective irradiance of photovoltaic modules. The measurement range is 50-1400W/m ², the resolution is 1W/m ², and the measurement accuracy is ± (5%+5 bits). It can accurately capture the dynamic changes of light energy resources, comprehensively restore the actual effective light energy received by photovoltaic modules, and provide core data for power generation efficiency calculation and performance attenuation analysis.
In terms of design, JW-F04 is deeply tailored to photovoltaic field application scenarios, balancing portability, durability, and ease of use. The whole machine adopts an integrated and compact design, with a small volume and light weight. It is equipped with a portable storage bag, which can be easily carried in a backpack. It is suitable for mobile scenarios such as power station inspections, site surveys, outdoor experiments, etc., without complex installation, and can be quickly deployed upon opening the box. The sensor adopts a highly stable optical lens and a sealed protective structure, which is dust-proof, moisture-proof and anti-aging. It can operate stably in a wide temperature environment of -30 ℃~60 ℃. It is not afraid of harsh working conditions such as mountains, deserts and coastal areas. The long-term measurement data drift is very small, ensuring long-term monitoring reliability.


The intelligent functional design significantly improves the practicality and operational efficiency of the equipment. JW-F04 is equipped with a high-definition LCD display screen, which displays real-time data such as instantaneous irradiance, cumulative irradiance, environmental temperature, etc. The interface is simple and intuitive, with one click operation, and can be used without professional training. Built in intelligent calibration and data recording functions, supporting automatic zero point calibration and temperature compensation, eliminating the influence of environmental factors on measurement accuracy; It can record data on a scheduled basis, has a large storage capacity, supports one click export of data to a computer, generates data reports and change curves, and facilitates later analysis and archiving. Simultaneously supporting wired 485/232 communication and wireless transmission, it can be integrated with photovoltaic monitoring platforms to achieve real-time data upload, remote viewing and analysis, adapt to unmanned monitoring scenarios, and assist in the digital upgrade of operation and maintenance.


In terms of application scenarios, the JW-F04 portable irradiance meter covers key links in the entire photovoltaic industry chain: during the site selection stage of photovoltaic power plants, it accurately measures the radiation resources in the target area, evaluates resource richness, and provides scientific basis for power plant site selection and installed capacity design; During the construction and acceptance stage of the power station, monitor the planar irradiance and power generation of the components synchronously, verify the rationality of the system design, and investigate installation mismatches, obstructions, and other issues; During the daily operation and maintenance phase, regularly monitor irradiance and component output power, calculate system PR values, accurately evaluate power generation efficiency, and promptly detect hidden dangers such as component attenuation and inverter failures; Power generation prediction and energy efficiency analysis, based on long-term irradiation data, establish accurate power generation prediction models, optimize operation and maintenance strategies, and improve the economic benefits of power stations; Research and teaching experiments provide accurate solar energy data for photovoltaic technology research and performance testing, helping technological innovation and talent cultivation.


Jiangsu Jingwei Technology Co., Ltd. focuses on the research and production of photovoltaic detection and environmental monitoring equipment. It has a complete research and development system, advanced production equipment, and strict quality control processes. Its products have stable performance and reliable quality, and have been widely used in various photovoltaic power stations, research institutions, and universities in China. The JW-F04 portable irradiance meter has become the preferred equipment for measuring solar energy in the photovoltaic industry due to its high precision, stability, and portability, helping the photovoltaic industry achieve refined and scientific operation and maintenance.


In the future, Jiangsu Jingwei will continue to deeply cultivate the field of photovoltaic environmental monitoring, continuously iterate and optimize the performance of JW-F04 products, expand multi parameter monitoring capabilities, and continuously improve product quality and service levels, providing customers with higher quality and more professional monitoring solutions, empowering the high-quality development of the photovoltaic industry.


Portable irradiation system thermometer, portable photovoltaic PR testing system, photovoltaic performance evaluation tool

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