Cold Solder Joint refers to a condition where the ribbon is not properly soldered to the main grid lines of the solar cell, creating a high-resistance point. It acts like a "thrombus" in the circuit, severely impairing current output—much like setting up a roadblock on a highway. This directly reduces the module's power generation capacity, leading to energy loss.
Portable EL Testers, with their high sensitivity, rapid detection, and intuitive results, serve as your "eagle eye" for incoming material inspections in the factory, production line monitoring, and even on-site power station maintenance!
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