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IEC 61215 Mechanical Load Testing: What Should You Verify?
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IEC 61215 Mechanical Load Testing: What Should You Verify?
Wind, snow and other mechanical loads are part of the real-world conditions PV modules may face throughout their service life.
So how do you verify whether a module is ready for them?
IEC 61215 MQT 16 provides a standardized approach for static mechanical load testing, helping evaluate a PV module's ability to withstand its declared mechanical design loads.
But mechanical load testing is not simply about reaching a pressure value.
The load needs to be applied and controlled under defined test conditions. Direction, load distribution, deformation measurement and test data all matter when evaluating how the module responds.
Maximum pressure matters — but it doesn't tell the whole story.
When evaluating a Mechanical Load Tester, it is worth looking beyond maximum pressure.
For example, Zealwe's ZW-MLT0202 Mechanical Load Tester provides:
→ Front / rear pressure capacity up to 10,000 / 6,000 Pa
→ Pressure uniformity between cylinders of ≤5%
→ Deformation measurement accuracy of ±0.1 mm
→ Bidirectional loading, automated control and test data recording
These capabilities help create controlled mechanical loading conditions for PV module testing according to applicable IEC requirements.
Ultimately, the question is not how much pressure the testing equipment can generate.
It is how the PV module performs under the required mechanical load.
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