EL Testing - Solar Panels का X Ray! | Find Hidden Defects on Solar Panels! | SolarSquare

Summary

Key Points

• EL (Electroluminescence) testing is a diagnostic method for solar panels that reveals hidden defects invisible to the naked eye, similar to how an X-ray detects internal body problems. 0:00
• These hidden defects, such as manufacturing flaws, microcracks from impact, or issues with cell busbar soldering, directly reduce the panel's power generation. 0:33
• EL testing is primarily conducted in the factory during the manufacturing process to identify and prevent defective panels from reaching customers, ensuring only healthy modules are supplied. 1:02
• It is also performed on-site when installed solar panels show reduced power output, especially after initial IV curve or thermography tests indicate a potential issue. 1:38
• The testing process involves supplying external DC power to the solar module, causing it to glow in darkness, which is then captured by a special infrared filter camera. 2:09
• The images captured by the camera clearly show any faults, cracks, or defects within the module, even tiny ones that significantly impact performance. 2:42
• Even minor cracks, invisible to the naked eye, can lead to a significant drop in a panel's power output, making EL testing essential for early detection. 3:18
• EL testing acts as a 'health checkup' for solar panels, ensuring the system operates at full efficiency and providing assurance of their performance. 3:50
• Customers should always request EL images from their rooftop solar installation company as proof that the installed panels are 100% defect-free and perfectly tested for best performance. 4:32