Resun Solar

In the photovoltaic energy sector, ensuring maximum efficiency and durability of photovoltaic modules is essential to gain customer trust and meet the expectations of maximum generation from the Photovoltaic Plant. Resun Solar, committed to excellence, conducts rigorous electroluminescence tests on all modules produced in its factory, ensuring the delivery of products of the highest quality. What is electroluminescence testing? The electroluminescence test (EL test) is an essential procedure in the quality control of photovoltaic modules. It works similarly to an X-ray, allowing manufacturers to visualize internal details of solar cells that would not be perceptible to the naked eye. This test is capable of identifying microcracks, breaks, damaged cells or any other anomaly in the module cells before they are sent to market. How does the electroluminescence test work? Preparing the module for testing The photovoltaic module is prepared and positioned to be subjected to analysis. This process takes place in a specific area of the factory, ensuring that all components are correctly connected and ready for testing, in accordance with applicable standards. Among them, the most important is IEC TS 60904 - which standardizes the quality criteria for extracted data. Some of the procedures for preparing the test are environmental lighting, temperature, image capture method, image processing method and guidance on how to analyze the test results. Applying electric current During the test, an electric current is applied to the module. This causes the photovoltaic cells to emit a slight glow - called the electroluminescence effect. This test is not visible to the naked eye, but is captured by special cameras, where the image generated indicates possible failures. For example, the percentage difference in hue between cells - with images varying across a spectrum of shades in white, gray, and black. A shade close to white indicates maximum cell efficiency and a shade close to black indicates cell inefficiency. Analysis of the generated images: The images captured during the process are analyzed by specialists, who look for signs of microcracks, dark spots, edges and junctions, cell breaks, or other irregularities that could compromise the efficiency of the module. Every detail is checked to ensure that only products that meet Resun standards are approved. Resun's rigorous quality standard At Resun, we understand that a photovoltaic module is a long-term investment, and the quality of each component is essential to ensure its durability and efficiency. Therefore, we apply the electroluminescence test to all manufactured modules, following a strict quality control standard. High-tech equipment Our factory has state-of-the-art equipment that guarantees high-resolution images during the electroluminescence test, allowing a detailed analysis of the cells. Specialized professionals We have a team of qualified engineers and technicians, who analyze each image generated during the test. They are responsible for identifying any anomalies and ensuring that only modules that meet our standards move on to the next phase of production. Transparency and commitment Resun values transparency in its manufacturing and quality control processes. We share with our partners and customers the assurance that each module that reaches the market has undergone a rigorous inspection process, including electroluminescence testing. Quality that guarantees trust Our commitment to quality is what sets us apart in the solar energy market. By performing electroluminescence testing on all modules, we ensure that our products are free from hidden defects, offering customers a reliable and high-performance solution. At Resun, we believe that every detail makes a difference, which is why we invest in processes that guarantee the excellence of our solar modules. Choosing Resun modules means choosing the safety of a tested and approved product, ready to offer the best performance in residential, commercial and industrial projects.

Resun Solar

Published articles

How important is the electroluminescence test for module quality?

Reducing costs and increasing gains with TopCon modules