Why Flexible Solar Module Quality Control Should Include Both Visual and Electrical Evaluation
Flexible photovoltaic modules may be used in applications with specific weight, shape, and mounting requirements. During product development and manufacturing, engineers need methods to evaluate both potential internal issues and electrical performance. EL and IV testing offer complementary information. EL testing for internal inspection EL imaging shows the emission pattern of an electrically excited photovoltaic module. Differences in emission can help engineers identify areas for further investigation. When a flexible module undergoes a controlled mechanical test, comparing EL images before and after the test may reveal changes that deserve attention. The images must be captured under comparable conditions for a meaningful comparison. IV testing for performance evaluation An IV tester measures the module's current-voltage relationship. This helps determine key parameters and evaluate how the module performs under defined conditions. Comparing pre-test and post-test IV measurem...