How UV Weathering Testing Works
During accelerated weathering testing, cable material samples are exposed to repeated cycles of ultraviolet light, moisture and controlled temperature.
These laboratory conditions accelerate the effects that outdoor exposure can have on polymer materials, allowing changes in material properties to be evaluated within a controlled test environment.
Accelerated testing does not directly represent a specific number of years of outdoor service. Instead, it provides a standardized method for comparing material performance before and after UV and moisture exposure.
What We Evaluate
After weathering exposure, cable sheath materials can be evaluated for changes in key mechanical and physical properties.
Tensile Strength
Measures whether the sheath material maintains sufficient mechanical strength following UV exposure.
Elongation at Break
Evaluates the flexibility and ability of the material to stretch after accelerated weathering.
Surface Condition
The cable material can also be inspected for visible deterioration or other changes caused by prolonged UV and moisture exposure.
UV Testing for Solar Cables
UV resistance is especially important for photovoltaic cables installed outdoors, where cables may remain exposed to sunlight for extended periods.
For H1Z2Z2-K solar cables manufactured according to EN 50618, weathering and UV resistance testing forms part of the performance verification requirements.
Under EN 50618, sheath samples are subjected to UV and water exposure for 720 hours (360 cycles). Mechanical properties are then compared with unexposed samples to evaluate material retention after weathering.
Testing can also support photovoltaic cables manufactured according to IEC 62930 and applicable customer specifications.
Why UV Resistance Matters
Adequate UV resistance helps the cable sheath maintain its mechanical properties during long-term outdoor installation.
For solar projects, this contributes to:
Long-term outdoor performance
Resistance to sunlight exposure
Sheath durability
Reliable cable performance
Consistent PV system operation
.png)
.png)
