Solar cables aren’t just exposed to blazing sun and UV radiation—they also face the challenge of surviving harsh winters. In cold climate regions, from the Canadian tundra to the steppes of Kazakhstan, a solar power system’s performance and durability depend heavily on one component: its low-temperature PV cable.
Why Is Low-Temperature Performance Critical?
In high-latitude or high-altitude locations, temperatures regularly drop below -20°C, sometimes plummeting to -40°C or lower. Without proper cold-resistant solar cables, solar systems may suffer from:
Brittle Cable Sheaths: Cold makes the outer jacket rigid, leading to cracks that let in moisture and dust, increasing the risk of short circuits and corrosion.
Insulation Failure: Low-grade materials lose flexibility, which can cause breakdowns or electrical leakage under stress.
Difficult Installation: In cold temperatures, cables can become stiff, making routing and termination difficult—and expensive.
Premature Aging: Even when not visibly damaged, cables under cold stress may degrade internally, shortening their lifespan.
Simply put, low-temperature solar cables must be engineered to withstand both mechanical stress and environmental extremes.
How Is Cold Resistance Tested for Solar Cables?
To qualify as a solar cable for cold environments, a cable must pass several rigorous industry tests:
① Cold Impact Test
Purpose: Simulates accidental mechanical impact on a frozen cable
Method: Cable samples are chilled to -40°C for a set duration, then struck with a specified force
Pass Condition: No cracks or visible damage to the sheath
② Cold Bending Test
Purpose: Checks the cable’s flexibility when bent at freezing temperatures
Method: Cable is cooled, then wound around a mandrel of defined diameter
Pass Condition: No cracking or breakage
③ Cold Handling Simulation (Optional)
Purpose: Mimics real-world installation under sub-zero conditions
Relevance: Useful for utility-scale projects or systems in alpine or tundra regions
What Do TÜV and IEC Standards Say About Cold-Weather Solar Cables?
Reputable solar certification bodies like TÜV Rheinland require cables to meet strict cold-resistance thresholds. For example, TÜV 2PfG 1169/08.2007 includes:
| Test | Requirement |
|---|---|
| Cold Impact | -40°C for 2 hours, no cracking |
| Cold Bending | -40°C, no visible damage |
| Min Installation Temp | ≥ -25°C |
| Min Operating Temp | ≥ -40°C |
The newer IEC 62930 standard further tightens requirements, offering specialized categories for cold climate-rated PV cables—ideal for northern and mountainous installations.
How Does KUKA CABLE Guarantee Cold-Weather Performance?
KUKA CABLE, a leading solar DC cable manufacturer, incorporates advanced engineering and strict testing protocols to deliver cables that perform reliably in freezing environments:
Flexible XLPO insulation retains elasticity down to -40°C
Electron-beam crosslinking enhances material strength and cold crack resistance
Every production batch is tested for cold impact and cold bending resistance
Third-party laboratories verify performance to ensure full TÜV and IEC compliance
These cables are built for projects that face snowstorms, icy winds, and temperature extremes—making them ideal for both rooftop and ground-mounted solar PV installations in cold climates.
Conclusion: Cold Resistance = System Reliability
Low temperatures are more than a seasonal challenge—they are a year-round threat to solar system safety and efficiency. Choosing a cold-resistant solar cable means choosing performance, durability, and peace of mind.
When operating in sub-zero conditions, don't take chances. Ensure your project uses TÜV-certified, low-temperature solar DC cables that can handle the freeze—so your energy output doesn’t.
