How to Test Flexible Solar Panels: A Beginner's Guide to EL and IV Testing
Flexible solar panels are designed for applications where shape, weight, or mounting conditions may make rigid modules less convenient. As with other photovoltaic products, their quality and electrical performance need to be evaluated using suitable testing methods. Two common methods are EL imaging and IV testing . What is EL testing? Electroluminescence testing electrically excites a photovoltaic module and captures its emitted light. The image can reveal differences in emission patterns that may help engineers investigate potential cell or interconnection issues. EL inspection is useful when an image of the module's emission behavior is needed. However, image interpretation depends on the module design and test conditions. What is IV testing? IV testing measures current and voltage under defined illumination and measurement conditions. It helps determine electrical parameters such as open-circuit voltage, short-circuit current, maximum power, and fill factor. These values ar...