In-Situ 
EL-testing

In-situ electroluminescence (EL) testing is typically performed at night, capturing images of solar panels under electrical excitation to reveal microcracks, cell degradation, and hidden defects, enabling precise on-site diagnostics and proactive maintenance.

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Mobile Testing

Mobile testing of solar modules involves using transportable equipment to measure performance on-site, including IV curves and electroluminescence, quickly identifying faults, degradation, and efficiency losses without removing panels, ensuring fast, accurate diagnostics and maintenance.

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Thermographic
Droning

Thermographic drone inspections use aerial thermal imaging to detect hotspots, shading, and panel defects across entire solar installations, providing fast, accurate, and cost-efficient diagnostics for preventive maintenance and performance optimization.

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Tailored Solutions: The Right Method for Every Damage Type

Our experts evaluate your solar system’s condition and recommend the most effective inspection method—whether thermographic drone, mobile testing, or in-situ EL—to ensure accurate diagnostics and efficient maintenance.

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How long does a test take?

Depending on the number of panels to be tested, we allow one hour for setup and teardown, and can test approximately 30 modules per hour. This number may vary. We will review with the client how much time is needed to perform the test.


Where can I have panels tested?

With our unique mobile tester, we can perform tests at any location. For existing rooftop projects, the panels must be removed so we can test them on the ground. The client is responsible for this.


What criteria are used to assess the panels?

SolarTester applies the Version 3.4 criteria developed by MBJ (Germany) in collaboration with TÜV. If desired, we can also apply other criteria to the test results to achieve your required evaluation. Please feel free to contact the SolarTester team for more information.