• Proven electroluminescence systems for the PV production!

    With more than 450 electroluminescence inspection systems sold for the PV industry, MBJ is one of the world's leading manufacturers of EL inspection systems for PV production industry.

  • Innovative LED Technology for A+A+A+ sun simulator!

    LED is the future for sun simulators! The long life time of the LED, the stable light source over the lifetime and the long puls length is the base for better measuring results and for less operation costs.

  • Solutions to meet the needs!

    Our sun simulators and electroluminescence test systems are adaptable to your requirements. Whether higher speed or new cell formats such as half cut cells, M6 or M12 cells we always have the right solution for you.

  • MBJ Backend Solutions

    Proven EL system meets innovative LED technology! Our Backend Solution combines the TÜV certified tripple A+ LED sun simulator, a hipot and grounding test and our proven EL technology on a very compact foot print.

MBJ Solutions News

MBJ Sun Simulator lab system

Field report of the Westphalian University on the MBJ Sun Simulator

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[Translate to english:] MBJSolutions_DeepLearning

REC Group and Energetica use artificial intelligence in their production test systems

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[Translate to english:] MBJ Solutions Company Building

MBJ Solutions GmbH takes over the business of MBJ Services GmbH

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TÜV TravelLab

MBJ Solutions together with TÜV Rheinland develop a mobile PV laboratory

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Defect detection with artificial intelligence

Using artificial intelligence, the proven inspection performance of the MBJ electroluminescence testers has once again significantly improved. A pre-trained neural network reliably detects typical defects such as micro-cracks, dark areas and soldering defects, while the pseudo defect rate is once again significantly reduced.

Remarkably, the deep learning method is very robust to variations in the cell material. The time-consuming and error-prone optimization of the image processing parameters is completely eliminated. Only a few more sample images are required for optimization. With relatively little effort, additional defect classes can be added according to customer requirements.

MBJ offers image processing with neural networks for all electroluminescence inspection systems in its product range.

Proven Electroluminescence Technology

With the help of electroluminescence images critical defects such as microcracks and soldering defects are made visible in PV modules . This test improves overall product quality and it optimizes the production process. Electroluminescence testing is a standard in todays module manufacturing and indispensable in production. These systems are usually used before lamination as process control and at the end of the production line as output control for all modules produced.

The requirements for the electroluminescence test have steadily increased in the last years. Today, as example, cycle times of less than 20 sec are required. An automatic evaluation with a high-resolution system is therefore the standard. With more than 300 electroluminescent test systems installed worldwide, MBJ is the market leader in Europe, offering the right solution for all requirements.

Innovative LED technology

LED technology is the future. With our LED flashers a flash duration of up to 200ms can be realized without any problems, which is indispensable for new module concepts. The LEDs are designed for several million measurements, under normal conditions, replacement of the LEDs is no longer necessary. The light intensity and the spectrum also remain stable over the entire product life cycle.

The long life of the LEDs also leads to an immense cost savings compared to a xenon flasher. Another advantage of LED technology is that the individual LEDs or the groups of LEDs can be controlled very precisely. This control allows a nearly constant luminosity over the entire flash duration. The very good stability of the light source leads to an excellent reproducibility of the measurement results. Are you interested? Find out more about our LED solar simulators.

Why you can trust MBJ

Customer focus

The customer and his requirements are at the center of our thoughts and actions.

Individual solutions

We love technical challenges. Customized adjustments are part of our business. Contact us.


We continuously improve our products and adapt them to the demands of the market.

Worldwide experience

Rely on our experience from more than 350 installed inspection systems worldwide.