Drone-Mounted Portable EL Tester for Solar Panel Inspection

Inspecting a large solar farm can be challenging because thousands of photovoltaic modules may be distributed across a wide area. Traditional inspection often requires technicians to access individual modules, while aerial surveys can help teams cover large sites more flexibly.

Yoha Solar Drone-Mounted Portable EL Tester


A Drone-Mounted Portable EL Tester combines two areas of technology: unmanned aerial vehicles (UAVs) and electroluminescence imaging. The concept is to explore whether EL inspection can be performed from an aerial platform under appropriate technical conditions.

Yoha Solar focuses on photovoltaic testing equipment and portable EL inspection solutions. A drone-mounted configuration must be evaluated as a complete system before its field capabilities can be confirmed.

What Is EL Testing?

Electroluminescence testing involves electrically energizing a solar module and capturing the light emitted by its cells.

The resulting image may reveal emission patterns associated with cell cracks, interrupted electrical pathways, and other potential internal defects. Such patterns require careful interpretation and may need to be compared with electrical measurements or other inspection results.



Why Consider Drone-Mounted EL Inspection?

Wider Site Coverage

An aerial platform may help inspection teams move between selected inspection locations without requiring direct physical access to every module.

Potentially More Flexible Inspection Routes

UAV flight planning can support repeatable survey routes, subject to site restrictions, flight duration, and equipment requirements.

Support for Targeted Maintenance

When combined with a reliable module-location workflow, aerial inspection data may help identify areas for follow-up investigation.

Potential Integration with Digital Records

Where supported by the system, images can potentially be associated with site coordinates, module identifiers, and inspection records.



Important Technical Requirements

A drone-mounted EL system must do more than capture ordinary solar panel photographs.

Electrical excitation: EL testing requires suitable electrical excitation of the module. The complete setup must meet electrical safety requirements.

Camera and optical system: The system must capture useful EL images at the intended distance, with sufficient image quality for the inspection objective.

Payload and power: The UAV must safely support the camera, electronics, and other required components within its approved payload and power limits.

Lighting conditions: Ambient light may interfere with EL image acquisition. The system needs a validated approach to managing optical conditions.

Flight stability and localization: Vibration, movement, camera angle, and module identification can affect the usefulness of the resulting data.

Drone EL Testing vs. Conventional EL Inspection

A conventional portable EL tester is typically used in a controlled setup with direct access to the module. Drone-mounted EL testing introduces additional engineering and operational requirements.

For some projects, aerial visual or thermal screening followed by ground-based EL testing may be more practical. The right workflow depends on the inspection objectives and available equipment.




How Yoha Solar Can Support Your Project

Yoha Solar provides portable EL testing solutions for photovoltaic inspection applications. Customers considering a drone-mounted EL workflow should confirm the required camera integration, electrical excitation method, UAV compatibility, image quality, and operating procedures before deployment.

Product information: https://www.whyoha.com/product/eltester/189.html

Website: https://www.yohasolar.com
Email: yohasolar@163.com

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