Cross and cell connectors are critical quality features of a solar module. Cross connectors are connected to the busbars of adjacent cells by solder joints. Under certain circumstances, these connections can break due to thermomechanical stresses or be defective from the outset due to an imperfect soldering process. Such defects in the electrical connections can lead to reduced performance and indicate quality deficits.
Missing electrical connections are often not recognizable visually or even by electroluminescence (EL) imaging. With Magnetic Field Images (MFIs), a quantitative assessment can easily be performed. Such defects are also easy to recognize visually in the data.
