# Solar Panel EL Defect Tester OEL-S2400 | Electroluminescence Testing Machine for Solar Module Quality Inspection - - Ooitech, the world's leading solar panel production line solutions provider, supply chain expert, solar panel making machine facotry > Ooitech OEL-S2400 Solar Panel EL Defect Tester is an offline electroluminescence testing machine designed to detect microcracks, black spots, mixed wafers, cold solder joints, and process defects in solar modules up to 2600mm x 1500mm. Features high-resol #### Solar Panel EL Defect Tester OEL-S2400 | Electroluminescence Testing Machine for Solar Module Quality Inspection Ooitech OEL-S2400 Solar Panel EL Defect Tester is an offline electroluminescence testing machine designed to detect microcracks, black spots, mixed wafers, cold solder joints, and process defects in solar modules up to 2600mm x 1500mm. Features high-resol ##### Stock: Available | 30~60 days manufacturing time ##### Category: Product ##### Tags: --- --- ##### Solar Panel EL Defect Tester OEL-S2400 — Advanced Electroluminescence Testing for Solar Module Quality Assurance ![Watch product video](https://cdn.ooitech.com/static/upload/image/20260326/2026032619008466.jpg.webp) The **Ooitech OEL-S2400 Solar Panel EL Defect Tester** is a professional-grade offline electroluminescence (EL) testing machine engineered for comprehensive quality inspection of solar modules. By applying a forward bias current to solar panels and capturing the resulting infrared electroluminescence emission with a high-resolution camera, this EL tester reveals hidden defects that are completely invisible to the naked eye. It is an indispensable quality control tool in any solar panel production line, ensuring that only defect-free modules reach the end customer. The OEL-S2400 is capable of detecting a wide range of critical defects including microcracks, cell breakage, black spots, mixed wafers, process defects, cold solder joints, and virtual welding issues. With its high-resolution 4928 x 3264 imaging sensor, super-white tempered glass sample stage, and intelligent defect classification software, this machine delivers fast, accurate, and repeatable inspection results. It supports solar modules up to 2600mm x 1500mm in size, making it compatible with all mainstream module formats including G1, M6, M10, M12, MBB, PERC, TOPCon, HJT, and shingled modules. Whether you are building a new solar panel production line or upgrading your existing quality control process, the Ooitech OEL-S2400 EL Defect Tester provides the reliability and precision you need to maintain the highest manufacturing standards. Watch our full MBB solar panel production line in action on our YouTube channel: [Ooitech YouTube Channel](https://www.youtube.com/ooitech). Subscribe, like, and stay updated with the latest solar panel manufacturing technology and equipment demonstrations. You can also watch our full automatic MBB production line video here: [MBB Full Automatic Solar Panel Production Line](https://www.youtube.com/watch?v=uRS9sn94sIQ). ##### Technical Specifications The following table provides the complete technical parameters of the Ooitech OEL-S2400 Solar Panel EL Defect Tester: | Parameter | Specification | | --- | --- | | Model | OEL-S2400 | | Capture Mode | Single Camera | | Run Mode | Offline | | Monitor Point | After Laminating | | Sample Stage | Super-white Tempered Glass | | Maximum Sample Size | 2600mm x 1500mm | | Operation Height | 1300mm | | Image Resolution | 4928 x 3264 pixels | | Exposure Time | 1 ~ 60 seconds (adjustable) | | Output Current / Voltage | 10A / 60V | | Detection Capability | Crack, Black Spot, Mixed Wafers, Process Defect, Cold Solder Joint, Virtual Welding, Cell Contamination | | Software Features | Barcode scanning interface with automatic file naming; Automatic defect classification with image folder creation and file saving | | Standard Configuration | EL testing host, computer, software | ##### Technical Advantages ###### Why Choose the Ooitech OEL-S2400 EL Defect Tester - **Reveals Invisible Defects:** Utilizes electroluminescence imaging technology to expose hidden defects such as microcracks, cell breakage, finger interruptions, dark areas, and cold solder joints that cannot be seen with the naked eye or standard visual inspection. - **High-Resolution Imaging:** Equipped with a 4928 x 3264 pixel high-resolution camera, the OEL-S2400 delivers the highest available resolution for detailed defect analysis, ensuring even the smallest flaws are captured and identified. - **Intelligent Defect Classification:** The integrated software automatically classifies detected defects into categories including welding spots, cracks, current mismatch, cell process defects, virtual welding, and cell contamination. Images are automatically organized into categorized folders for efficient record-keeping and traceability. - **Barcode Integration:** The built-in barcode scanning interface allows operators to scan module barcodes and automatically name image files accordingly, streamlining production data management and enabling full traceability across the manufacturing process. - **Improved Production Yield:** By identifying defective modules early in the production process — particularly after lamination — the EL tester helps manufacturers avoid shipping defective products, significantly reducing warranty claims and improving overall line yield. - **Enhanced Product Quality and Reliability:** Systematic EL inspection ensures that every solar module leaving the production line meets stringent quality standards, building customer confidence and strengthening brand reputation. - **Flexible Testing Capability:** The system is designed to test both framed and unframed solar modules, and can be deployed before or after lamination depending on your production line configuration. It supports all mainstream module sizes up to 2600mm x 1500mm. - **Adjustable Exposure Settings:** With an exposure time range of 1 to 60 seconds, operators can fine-tune imaging parameters to achieve optimal results for different cell technologies and module configurations. - **Super-white Tempered Glass Stage:** The sample stage is constructed from super-white tempered glass, providing a clean, uniform, and durable testing surface that does not interfere with EL image quality. - **User-Friendly Operation:** The intuitive software interface and ergonomic 1300mm operation height make the OEL-S2400 easy to operate, reducing training time and minimizing operator fatigue during extended production runs. ##### Product Applications ###### Defect Types Detected by the OEL-S2400 The Ooitech OEL-S2400 Solar Panel EL Defect Tester is designed to detect and classify the following defect types commonly found in solar module manufacturing: - **Microcracks and Cell Breakage:** Detects hairline cracks and fractures in solar cells that can lead to power degradation and hotspot formation over the module's lifetime. - **Black Spots and Dark Areas:** Identifies inactive cell regions caused by material defects, contamination, or process issues that reduce cell efficiency. - **Mixed Wafers:** Reveals inconsistencies in cell batches where wafers with different electrical characteristics have been inadvertently mixed, leading to current mismatch losses. - **Process Defects:** Catches manufacturing anomalies such as incomplete metallization, broken fingers, and uneven anti-reflective coating application. - **Cold Solder Joints and Virtual Welding:** Detects poor solder connections between cell interconnections and bus bars that can cause electrical resistance, power loss, and long-term reliability failures. - **Cell Contamination:** Identifies foreign particles or residue on cell surfaces that affect performance and appearance. ###### Application Scenarios in Solar Panel Production Lines - **Post-Lamination Quality Inspection:** The OEL-S2400 is optimally positioned after the lamination stage in a solar panel production line to perform final EL inspection before framing and packaging. - **Incoming Cell Quality Verification:** Can also be used to verify the quality of incoming solar cells before they enter the stringing and layup process. - **R&D and Failure Analysis:** Ideal for research and development laboratories performing failure analysis, process optimization, and new cell technology evaluation. - **Compatible Module Technologies:** Supports EL testing for all mainstream solar cell and module technologies including PERC, TOPCon, HJT, IBC, ABC, HPBC, shingled, MBB (multi-busbar), half-cut, and flexible modules in G1, M6, M10, and M12 wafer formats. - **Production Line Integration:** Suitable for integration into 5MW to 1GW solar panel production lines. Ooitech provides complete turnkey production line solutions including cell laser cutting machines, tabber stringers, layup machines, bussing machines, EL testers, laminators, framing machines, glue dispensing machines, IV testers, sun simulators, glass loading machines, and EVA/TPT cutting machines. ##### Warranty and After-Sales Service Ooitech provides comprehensive warranty coverage and professional after-sales support for the OEL-S2400 Solar Panel EL Defect Tester: - **Warranty Period:** One year warranty after successful installation, or 16 months from Bill of Lading (BL) date, whichever comes first. Machines must be operated by trained personnel who have received Ooitech's official installation and training program. - **Free Maintenance and Spare Parts:** During the warranty period, Ooitech provides timely maintenance services and necessary spare parts free of charge (excluding consumable parts). Courier costs for spare parts shipping are the responsibility of the buyer. - **On-Site Engineer Support:** If the buyer's engineers cannot resolve an issue remotely during the warranty period, Ooitech will dispatch engineers to the buyer's facility. The buyer is responsible for round-trip airfare, local transportation, hotel accommodation, and meals. - **Warranty Exclusions:** The warranty does not cover damage or malfunctions resulting from misuse, abuse, unauthorized disassembly or modification by parties other than Ooitech's authorized technicians, or use inconsistent with the operation manual. - **Post-Warranty Support:** After the warranty period, Ooitech continues to provide free online technical support and guidance. Spare parts are available at favorable prices. If on-site repair is required, the buyer covers airfare, visa fees, food, hotel, travel expenses, and labor costs according to Ooitech's standard rates. - **Consumable Parts:** Consumable components are available for purchase at any time upon request. ##### Contact Us to Get a Quote Ready to enhance your solar panel production line with professional EL defect testing? Contact Ooitech today for pricing, technical consultation, and customized production line solutions. - **Email:** [info@ooitech.com](mailto:info@ooitech.com) - **Phone:** +8618571646990 - **WhatsApp:** +8615961592660 - **Head Office:** Wuhan Yangtze River Center, Wuhan, China - **Website:** [www.ooitech.com](https://www.ooitech.com) Download our complete product catalog: [Ooitech Catalog Download](https://drive.google.com/file/d/1EWA3TV6hJb_cAUH6w0UENpRglAgq_Kzv/view?usp=sharing) Download our company profile: [Ooitech Company Profile](https://drive.google.com/file/d/1yg9NLXzLOmPWriYScQZeM6ZfSZ8gcQ88/view?usp=sharing) Visit our YouTube channel for more solar panel production line videos and equipment demonstrations: [Ooitech YouTube Channel](https://www.youtube.com/ooitech). Subscribe and like to stay informed about the latest solar manufacturing technology! ## Related Items ![Single Layer Double Chamber Automatic BIPV Laminator OTCY-2754DD | Ooitech Solar Panel Lamination Equipment](https://cdn.ooitech.com/static/upload/image/20260325/1774438506273987.webp) #### Single Layer Double Chamber Automatic BIPV Laminator OTCY-2754DD | Ooitech Solar Panel Lamination Equipment ![Junction Box AB Component Filling Glue Machine SPZ-AB10S-JH | Ooitech Solar Panel Production Equipment](https://cdn.ooitech.com/static/upload/image/20260326/1774504501115202.webp) #### Junction Box AB Component Filling Glue Machine SPZ-AB10S-JH | Ooitech Solar Panel Production Equipment ![Automatic Layout & Bussing Integrated Machine ALU-HBL | Solar Panel Production Equipment | Ooitech](https://cdn.ooitech.com/static/upload/image/20260324/1774346811981523.webp) #### Automatic Layout & Bussing Integrated Machine ALU-HBL | Solar Panel Production Equipment | Ooitech ![CHT9980A/CHT9981A PV Safety Comprehensive Tester | Solar Panel Hipot Insulation Ground Continuity Tester](https://cdn.ooitech.com/static/upload/image/20260327/2026032763823477.jpg) #### CHT9980A/CHT9981A PV Safety Comprehensive Tester | Solar Panel Hipot Insulation Ground Continuity Tester ![Automatic Layup & Bussing Integrated Machine SAW-100A | Solar Panel Production Equipment | Ooitech](https://cdn.ooitech.com/static/upload/image/20260324/1774349342486074.webp) #### Automatic Layup & Bussing Integrated Machine SAW-100A | Solar Panel Production Equipment | Ooitech ![Non-Destructive Solar Cell Laser Cutting Machine - Advanced TCS Technology for High-Efficiency Cell Production](https://cdn.ooitech.com/static/upload/image/20260323/1774252043927784.webp) #### Non-Destructive Solar Cell Laser Cutting Machine - Advanced TCS Technology for High-Efficiency Cell Production ![Gsolar Solar Panel Tester Sun Simulator GIV-20A2616 | A+A+A+ Class Solar Module IV Tester](https://cdn.ooitech.com/static/upload/image/20260326/1774508988152657.webp) #### Gsolar Solar Panel Tester Sun Simulator GIV-20A2616 | A+A+A+ Class Solar Module IV Tester ![CHT9951A/CHT9951B Solar Panel Hipot Insulation Resistance Tester | PV Module Safety Testing Equipment](https://cdn.ooitech.com/static/upload/image/20260327/1774601338282260.webp) #### CHT9951A/CHT9951B Solar Panel Hipot Insulation Resistance Tester | PV Module Safety Testing Equipment ![](/template/ooitech/assets/img/shape/06.png) ![](https://cdn.ooitech.com/static/upload/image/20250909/1757399770541443.webp) ### Request A Quote All uploads are secure and confidential. ## We deliver expertise you can trust our service Direct-from-Factory Equipment. ![](/template/ooitech/assets/img/icon/money-2.svg) ### Cost-Effective Advantages We deliver exceptional value, maximizing results while optimizing budgets for clients. ![](/template/ooitech/assets/img/icon/staff.svg) ### Our Experience Team Our skilled professionals specialize in innovative solutions and tailored strategies. ![](/template/ooitech/assets/img/icon/certified.svg) ### 15+ Years Industry Experience Deep expertise ensures reliable, trend-aware, and proven outcomes for success. ![](https://cdn.ooitech.com/static/upload/image/20250910/1757477357667605.webp) ![](https://cdn.ooitech.com/static/upload/image/20250910/1757477724911512.webp) ![](/template/ooitech/assets/img/shape/06.png) ## What Our Client Say's about us Client testimonials praise our deep understanding of their challenges, which leads to innovative solutions and strong ROI. Long-term collaborations—some over a decade—demonstrate their trust and satisfaction. Their success stories drive us to continually exceed expectations. [Know More **](#quote-form) ![](/template/ooitech/assets/img/icon/quote.svg) Thanks to Ooitech for providing the fully automated production equipment—your installation and after-sales service have been excellent. ![Amjad](https://cdn.ooitech.com/runtime/image/w800_h800_fitblur_v2_2026041720921238.webp) ### Amjad ![](/template/ooitech/assets/img/icon/quote.svg) A man with a big soul. Thank you very much for your visit Mr Wu. Thank you very much for the services provided in installing equipment and training my students. The kindest person and professional in his field ![Jizzakh Polytechnic Institute](https://cdn.ooitech.com/runtime/image/w800_h800_fitblur_v2_2026041716444445.webp) ### Jizzakh Polytechnic Institute ![](/template/ooitech/assets/img/icon/quote.svg) Thank you again so much again for the very big big help for improving and fixing the factory and also teaching the workers how to use the machines ![Mark](https://cdn.ooitech.com/runtime/image/w800_h800_fitblur_v2_1757479675272137.webp) ### Mark BIPV Philippines ![](/template/ooitech/assets/img/icon/quote.svg) Thanks to Ooitech for providing highly suitable BC solar cell experimental equipment. ![KTECH](https://cdn.ooitech.com/runtime/image/w800_h800_fitblur_v2_1776426122864564.webp) ### KTECH ## Our Latest News & Blog ![Armenia 300MW Solar Panel Production Line Project 2021](https://cdn.ooitech.com/runtime/image/w800_h500_2026041716202540.webp ) - [** ooitech](/armenia-300mw-solar-panel-production-line-project-2021.html) - [** 63](/armenia-300mw-solar-panel-production-line-project-2021.html) ### Armenia 300MW Solar Panel Production Line Project 2021 In 2021, a photovoltaic manufacturer in Armenia deployed a 300MW full-automatic solar panel production line, marking a significant step in the country's push toward domestic solar module manufacturing capacity. ![Multiple Colombian Customers Adopt Ooitech Solar Panel Production Lines](https://cdn.ooitech.com/runtime/image/w800_h500_2026042116141975.webp ) - [** ooitech](/multiple-colombian-customers-adopt-ooitech-solar-panel-production-lines.html) - [** 64](/multiple-colombian-customers-adopt-ooitech-solar-panel-production-lines.html) ### Multiple Colombian Customers Adopt Ooitech Solar Panel Production Lines Several Colombian manufacturers have deployed Ooitech solar panel production lines, strengthening local PV manufacturing capacity and supporting Latin America's renewable energy transition. ![Egyptian Solar Company Upgrades Production Line with Full Automatic Tabber Stringer in 2021](https://cdn.ooitech.com/runtime/image/w800_h500_2026032361044444.webp ) - [** ooitech](/egyptian-solar-company-upgrades-production-line-with-full-automatic-tabber-stringer-in-2021.html) - [** 72](/egyptian-solar-company-upgrades-production-line-with-full-automatic-tabber-stringer-in-2021.html) ### Egyptian Solar Company Upgrades Production Line with Full Automatic Tabber Stringer in 2021 An Egyptian photovoltaic company upgraded its solar panel production line in 2021 by adopting a full automatic tabber stringer machine to boost manufacturing efficiency and output quality. ![30MW BIPV Solar Panel Production Line in Philippines Powered by Ooitech](https://cdn.ooitech.com/runtime/image/w800_h500_2026041451376657.webp ) - [** ooitech](/30mw-bipv-solar-panel-production-line-in-philippines-powered-by-ooitech.html) - [** 735](/30mw-bipv-solar-panel-production-line-in-philippines-powered-by-ooitech.html) ### 30MW BIPV Solar Panel Production Line in Philippines Powered by Ooitech Ooitech delivers a complete 30MW BIPV solar panel production line to the Philippines, enabling local manufacturing of building-integrated photovoltaic modules. Discover the full turnkey solution including equipment, training, raw materials, and after-sale ![Solar Panel Factory in Kanpur Starts Production with Semi-Automatic Line from Ooitech](https://cdn.ooitech.com/runtime/image/w800_h500_2026041629284813.webp ) - [** ooitech](/solar-panel-factory-in-kanpur-starts-production-with-semi-automatic-line-from-ooitech.html) - [** 64](/solar-panel-factory-in-kanpur-starts-production-with-semi-automatic-line-from-ooitech.html) ### Solar Panel Factory in Kanpur Starts Production with Semi-Automatic Line from Ooitech A renewable energy company in Kanpur, Uttar Pradesh has launched solar panel production using a semi-automatic manufacturing line supplied by Ooitech, marking another step in India's growing domestic solar manufacturing push. ![Algeria Solar Company Procures 3A Grade IV Tester and Environmental Chamber from Ooitech in 2017](https://cdn.ooitech.com/runtime/image/w800_h500_2026041662570864.webp ) - [** ooitech](/algeria-solar-company-procures-3a-grade-iv-tester-and-environmental-chamber-from-ooitech-in-2017.html) - [** 62](/algeria-solar-company-procures-3a-grade-iv-tester-and-environmental-chamber-from-ooitech-in-2017.html) ### Algeria Solar Company Procures 3A Grade IV Tester and Environmental Chamber from Ooitech in 2017 In 2017, an Algerian photovoltaic company purchased a 3A grade IV tester and environmental test chamber from Ooitech to strengthen solar panel quality assurance and reliability testing capabilities. ![Ooitech Maintains Full Operations During COVID-19 Pandemic, Continues Delivering Turnkey Solar Panel Solutions Worldwide](https://cdn.ooitech.com/runtime/image/w800_h500_2026041612688833.webp ) - [** ooitech](/ooitech-maintains-full-operations-during-covid-19-pandemic-continues-delivering-turnkey-solar-panel-solutions-worldwide.html) - [** 68](/ooitech-maintains-full-operations-during-covid-19-pandemic-continues-delivering-turnkey-solar-panel-solutions-worldwide.html) ### Ooitech Maintains Full Operations During COVID-19 Pandemic, Continues Delivering Turnkey Solar Panel Solutions Worldwide Ooitech maintained full operations during the 2020 COVID-19 pandemic with all staff healthy, continuing to deliver turnkey solar panel production line solutions and raw materials to clients in Egypt, Italy, Syria, India, Poland, Peru, Mexico and more. ![Polish Manufacturer Deploys Ooitech 60MW Fully Automatic Solar Panel Production Line](https://cdn.ooitech.com/runtime/image/w800_h500_1776424002204013.webp ) - [** ooitech](/polish-manufacturer-deploys-ooitech-60mw-fully-automatic-solar-panel-production-line.html) - [** 66](/polish-manufacturer-deploys-ooitech-60mw-fully-automatic-solar-panel-production-line.html) ### Polish Manufacturer Deploys Ooitech 60MW Fully Automatic Solar Panel Production Line A Polish solar manufacturer has successfully deployed a 60MW fully automatic solar panel production line supplied by Ooitech, strengthening local PV module capacity in Central Europe.