How can El images be used to measure PV module defects?

The prevalence of multiple defects, e.g. micro cracks, inactive regions, gridline defects, and material defects, in PV module can be quantified with an EL image. Modern, deep learning techniques for computer vision can be applied to extract the useful information contained in the images on entire batches of PV modules.

How do solar panels work?

The solar panel is placed in a dark room to avoid any interference from outside light while checking it. When you apply a positive voltage to the solar cells, they start producing infrared light due to electroluminescence. An infrared camera that can see heat is used to take pictures of the solar cells.

What is a solar panel inspection?

1. Quality Assurance: The inspector looks at how the light comes out of the solar cells on the panel to see if there are any issues like defects or hotspots. This helps make sure the panel works properly and lasts a long time. It also helps to fix any problems before sending the panels to customers. 2.

How does a solar panel tester work?

1. Light Source: The tester incorporates a light source capable of emitting a controlled voltage across the solar panel, stimulating electroluminescence. 2. Imaging System: A high-resolution camera or imaging device captures detailed images of the electroluminescent response from the solar panel. 3.

What are El Solar module testers?

Electroluminescence solar module testers are designed with a range of features to optimize the testing and analysis of solar panels. Some of the key features include: 1. High-Resolution Imaging: EL testers use really good cameras to take detailed pictures of how light comes out of a solar panel.

Can a SWIR camera be used for photovoltaic solar panels?

Raptor Photonics has published an application note explaining how its SWIR (short-wave infrared) cameras can be used in drone-based electroluminescence (EL) imaging of photovoltaic (PV) solar panels.