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In the dynamic realm of photovoltaic (PV) technology, the choice of cable is crucial for efficient power transmission. Single core PV cables with 4mm² and 10mm² cross - sectional areas stand out as versatile solutions tailored to different solar project scales. Crafted with high - purity copper conductors and robust insulation, these cables combine safety, durability, and performance, enabling seamless operation in diverse solar applications.
I. Technical Specifications
1.1 Conductor and Insulation
Parameter | 4mm² PV Cable | 10mm² PV Cable |
Conductor Material | Oxygen - free copper (≥99.97%) | Oxygen - free copper (≥99.97%) |
Cross - Sectional Area | 4 square millimeters | 10 square millimeters |
Inner Insulation | Cross - linked polyethylene (XLPE) | Cross - linked polyethylene (XLPE) |
Outer Insulation | UV - stabilized, halogen - free TPE | UV - stabilized, halogen - free TPE |
1.2 Electrical and Physical Parameters
Parameter | 4mm² PV Cable | 10mm² PV Cable |
Rated Voltage | 1000V DC / 1500V DC | 1000V DC / 1500V DC |
Current Rating (90°C) | 32A | 60A |
DC Resistance (20°C) | ≤4.61Ω/km | ≤1.83Ω/km |
Insulation Resistance | ≥100MΩ @ 500V DC | ≥100MΩ @ 500V DC |
Flame Retardancy | IEC 60332 - 1 - 2 compliant | IEC 60332 - 1 - 2 compliant |
Minimum Bend Radius | 4 - 6 times cable diameter (~16 - 24mm) | 4 - 6 times cable diameter (~40 - 60mm) |
Operating Temperature | - 40°C to + 90°C | - 40°C to + 90°C |
Certifications | TÜV EN 50618, IEC 62930, UL 4703 | TÜV EN 50618, IEC 62930, UL 4703 |
II. Performance Advantages
2.1 4mm² PV Cable: Compact and Efficient
Ideal for Small - Scale Systems: With a current - carrying capacity of 32A, the 4mm² cable is perfectly suited for residential solar setups of up to 5kW. For example, in a typical single - family home rooftop PV system in suburban areas, it efficiently transfers power from solar panels to the inverter, minimizing voltage drop and power losses.
Flexibility and Ease of Installation: Its smaller diameter allows for easy routing through tight spaces and conduits, making it convenient for rooftops with complex layouts or limited installation areas. The double - insulated design ensures safety, protecting against electrical leakage and external damage.
2.2 10mm² PV Cable: High - Power and Long - Range
Powerhouse for Large - Scale Projects: Capable of handling 60A, the 10mm² cable is designed for commercial and industrial solar farms, as well as large - scale residential arrays. In a 50MW solar farm, it connects multiple panel strings to inverters over long distances, maintaining high - efficiency power transmission even in the face of high currents and extended cable runs.
Enhanced Durability: The larger cross - sectional area reduces electrical resistance, further minimizing power losses. Its robust construction, with thick insulation layers, provides excellent protection against mechanical stress, UV radiation, and extreme weather conditions, ensuring reliable operation in harsh environments like deserts or coastal regions.
III. Application Scenarios
3.1 4mm² PV Cable Applications
Residential Rooftop Solar: Connecting individual solar panels in small households or apartments.
Small Commercial Installations: Powering solar - based lighting, ventilation systems, or small - scale energy - efficient equipment in shops and offices.
Off - Grid Solar Kits: Ideal for portable solar power systems used in camping, RVs, or remote cabins, where space and weight are considerations.
3.2 10mm² PV Cable Applications
Commercial and Industrial Solar Farms: Linking large arrays of solar panels to central inverters and the electrical grid.
Large - Scale Residential Communities: Meeting the higher power demands of multi - unit residential buildings with extensive solar installations.
Utility - Scale Solar Projects: Facilitating long - distance power transmission from solar fields to substations, ensuring stable and efficient energy delivery.
IV. Manufacturing and Quality Assurance
Both 4mm² and 10mm² PV cables are manufactured using advanced processes in modern facilities. Chinese manufacturers, for instance, leverage automated extrusion lines to precisely apply insulation layers and high - precision drawing machines to produce consistent copper conductors. Rigorous quality control measures are implemented, including:
Raw Material Testing: Verifying the purity of copper and the quality of insulation materials.
Electrical Testing: Conducting voltage withstand, insulation resistance, and current - carrying capacity tests.
Environmental Testing: Subjecting cables to UV aging, moisture resistance, and temperature cycling tests to simulate real - world conditions.
V. Market Competitiveness
In the global PV cable market, 4mm² and 10mm² single core cables from leading manufacturers offer a competitive edge. Economies of scale enable cost - effective production without compromising quality, making them attractive options for installers and project developers worldwide. Their compliance with international standards ensures seamless integration into solar projects across different regions, from Asia to Europe and the Americas.
In summary, the single core 4mm² and 10mm² PV cables are essential components for solar power systems, each optimized for specific power requirements and application scenarios. Their reliability, efficiency, and durability contribute significantly to the growth and success of the renewable energy sector.