PV1-F 4.0mm² TUV Certified Solar Cable 1500V DC UV Resistant Photovoltaic Wire

PV1-F 4.0mm² TUV Certified Solar Cable 1500V DC UV Resistant Photovoltaic Wire

Cable Designation & Meaning

Construction: Tinned copper conductor, halogen-free cross-linked polyolefin (XLPO) insulation and sheath, single-core flexible photovoltaic DC cable.

Applicable Standards

• EN 50618:2014 — Electric cables for photovoltaic systems (DC rated voltage 1.8 kV)
• IEC 62930 — Photovoltaic system cables (single-core, XLPO insulated, rated up to 1.5 kV DC)
• TÜV 2 PfG 1169/08.2007 — TÜV specification for PV cables
• IEC 60228 / GB/T 3956 — Conductors (Class 5 flexible, tinned copper)
• IEC 60332-1 — Flame retardant (single cable)
• IEC 61034 — Smoke density (low smoke)
• IEC 60754 — Halogen content (halogen-free)
• IEC 60811 — Insulating and sheathing materials — Common test methods

PV1-F 1×4.0 mm² Photovoltaic DC Cable Technical Specifications and Engineering Parameters

1. Product Profile & Rated Parameters

The PV1-F 1×4.0 mm² is a single-core flexible photovoltaic dedicated DC cable featuring tinned annealed copper conductor. It boasts a rated DC voltage of 0.6/1.0 kV with a maximum sustainable system voltage of 1.8 kV, and fully complies with the certification standards TÜV 2 PFG 1169 and EN 50618. Exclusively developed for DC loop applications in photovoltaic power generation systems, this cable is mainly applied to series connection of solar panels and DC line laying between string junction boxes and inverters.

Different from conventional AC power cables for indoor use, this product is optimized for long-term outdoor harsh environment operation, resisting ultraviolet radiation, ozone erosion and extreme temperature fluctuations, and adapting to mechanical laying operations on photovoltaic support frames and building roofs. The 4.0 mm² conductor cross-section is a mainstream specification for residential and commercial rooftop photovoltaic string systems, with a safe carrying current of up to 45 A. The cable has an outer diameter of approximately 5.0 mm and a unit weight of 45 kg/km, and is supplied in standard packaging forms of 200 m, 500 m and 1000 m coils or wooden drums.

2. Structural Layer Configuration

The cable adopts a simple and reliable single-layer protective structure without armor and outer sheath, with the irradiated cross-linked insulation layer serving as the weather-resistant outer protective layer. The detailed structural parameters are shown in the table below:

3. Electrical Performance Indicators

The Class 5 flexible tinned copper conductor of the 4.0 mm² cable has a maximum DC resistance of 4.61 Ω/km at a standard temperature of 20 °C. The cable undergoes routine voltage withstand tests: 3.5 kV AC withstand for 5 minutes or 6.5 kV DC withstand for 15 minutes, with a minimum insulation resistance of 200 MΩ·km.

In a free-air environment at 30 °C ambient temperature, the cable’s rated carrying current is 45 A; when the ambient temperature rises to 60 °C, the current rating is derated to 36 A. For a 100 m two-way wiring loop with a working current of 45 A, the loop voltage drop is about 4.2 V. At a conductor temperature of 90 °C and current of 45 A, the unit power loss of the cable is 9.4 W/m.

Insulation & Sheath Data

Electrical Parameters

Reference values: 4.0 mm² Cu at 44 A, DC 1000 V → max DC power ≈ 44 kW per string (2 strings in parallel = 88 kW). Voltage drop at 44 A ≈ 22.4 mV/A·m (≈2.24% per 10 m at 44 A, 1000 V).

Temperature Characteristics

4. Temperature Adaptability & Weather Resistance

The irradiated XLPE insulation material enables the cable to operate continuously at a conductor temperature of 90 °C, and can withstand a short-circuit high temperature of 200 °C within 5 seconds. The applicable ambient temperature range of the cable is -40 °C to +90 °C, and it has passed the low-temperature bending test at -40 °C without damage.

The black carbon-filled insulation material provides superior environmental adaptability: it passes 1000-hour UV aging pre-treatment certified by TÜV, features excellent ozone corrosion resistance, and meets the vertical flame self-extinguishing standard of IEC 60332-1 for flame retardancy. In the 135 °C / 168-hour thermal aging test, the cable surface remains intact without cracking after bending inspection.

Fire Performance (PV1-F — Standard)

5. Laying & Operation Specifications

The cable has different minimum bending radius requirements according to usage scenarios: 4 times the outer diameter (about 20 mm) for fixed installation; 6 times the outer diameter (about 30 mm) for dynamic laying scenarios with frequent bending such as solar tracking systems.

It is applicable for fixed clamping on photovoltaic module frames, dedicated photovoltaic cable trough wiring and light-duty conduit penetration laying, but direct buried laying in soil is prohibited. The cable must be matched with PV4/MC4 special connectors and crimped with professional photovoltaic crimping tools, and ordinary universal terminals are not allowed for replacement. Positive and negative polarity marks are continuously printed on the cable surface for easy identification. The minimum construction ambient temperature for laying is -40 °C. With a lightweight design of 4.5 kg per 100 m, the cable is convenient for manual laying and operation on rooftop construction sites.

Mechanical & Installation Parameters

6. Main Application Scenarios

PV1-F 1×4.0 mm² cable is the standard special wiring for DC systems of various photovoltaic power stations, covering multiple application scenarios. It is widely used for string wiring of residential rooftop photovoltaic systems (wiring between modules and combiner boxes), commercial and industrial rooftop photovoltaic projects, large ground-mounted photovoltaic power stations, floating photovoltaic power plants, as well as photovoltaic systems of carports and canopy buildings.

In addition, it is applicable to off-grid solar power generation and energy storage integrated DC systems, and DC input side wiring of centralized and string inverters. It can be used as jumper wires between photovoltaic modules (to make up for insufficient length of original module leads) and main line cables from the last module of the string to combiner boxes or inverter DC terminals.

7. Testing & Quality Assurance System

Each batch of cable products will undergo full-item routine testing before leaving the factory, including: conductor DC resistance detection (≤4.61 Ω/km at 20 °C), AC/DC voltage withstand test, insulation resistance test, dimensional inspection (insulation thickness ≥1.0 mm, outer diameter standard ≈5.0 mm) and surface marking inspection.

Product type tests cover comprehensive environmental and performance verification: 1000-hour UV pre-aging test, 135 °C long-term thermal aging test, -40 °C low-temperature bending test, 150 °C thermal shock test, IEC 60332-1 flame retardancy test, ozone resistance test, abrasion resistance test and tinned copper conductor quality inspection, to ensure long-term stable operation of the product.

Cable Parameters

Cable Test Parameters

Cable Cross Section Structure

Construction Description

8. Implementation Standards & Certification Compliance

The design, production and inspection of PV1-F 1×4.0 mm² cable strictly follow multiple authoritative standards: German TÜV 2 PFG 1169 photovoltaic cable certification specification, European unified standard EN 50618 and Chinese national standard GB/T 32129. The internal conductor fully meets the EN 60228 Class 5 flexible conductor specification. The product has obtained TÜV certification and is suitable for all photovoltaic DC systems with a maximum voltage of 1.8 kV.

9. Packaging, Storage & Logistics Requirements

The standard packaging specifications of the cable are 200 m, 500 m and 1000 m per coil or wooden drum, and customized fixed-length cutting services can be provided according to customer demands. Each cable is printed with continuous identification marks, including model (PV1-F 1×4.0), rated voltage (0.6/1.0 kV), positive and negative polarity, manufacturer information, production year and meter scale marks.

For storage, the cable should be placed in dry and covered indoor environments with ambient temperature controlled at -20 °C to +40 °C, avoiding direct sunlight exposure. The sealing ends of the cable coil must be kept intact before construction to prevent moisture and dust from entering.

10. Procurement Guidelines

When purchasing, the complete specification PV1-F 1×4.0 mm² 0.6/1.0 kV DC and required length or packaging form must be clearly specified. It is recommended to purchase supporting PV4/MC4 connectors and special crimping tools in a unified manner, as unqualified connector crimping is the main cause of failure of photovoltaic DC systems.

Buyers shall request the factory official test report of the batch of products, which must include UV aging test data and tinned copper conductor inspection records, to verify the actual outer diameter, unit weight and conductor resistance indicators of the products, ensuring compliance with engineering standards.

11. Industry Common Questions & Professional Answers

Q1: What is the essential difference between PV1-F cable and ordinary RV/BV building wires?
A1: PV1-F cables are specially customized for outdoor high-intensity environmental operation. They adopt electron beam cross-linked XLPE insulation (instead of ordinary PVC material) and tinned copper stranded conductors, with the insulation layer integrating weather resistance protection. Ordinary PVC building wires are prone to aging, cracking and performance degradation after long-term exposure to UV and temperature cycles, and cannot adapt to outdoor photovoltaic working conditions.

Q2: Why do photovoltaic systems adopt single-core PV1-F cables instead of two-core cables?
A2: The DC working voltage of photovoltaic strings can reach up to 1.8 kV. Separate laying of positive and negative single-core cables makes the system layout more modular, supports flexible matching of various string lengths, and effectively eliminates the hidden danger of loop current heating caused by shared core laying of two-core cables.

Q3: What is the meaning of the PV1-F model code?
A3: PV stands for photovoltaic dedicated cable; 1 represents single-core structure; F means flexible conductor (Class 5 flexible stranded structure). This is a unified standardized model designation defined by TÜV for photovoltaic DC special cables.

Q4: What is the purpose of tinning copper conductors?
A4: The tin coating on the conductor surface can effectively isolate air and moisture, prevent copper strand oxidation and atmospheric corrosion. This is a key design to ensure the 25-year long service life of outdoor photovoltaic cables.

Q5: What are the advantages of irradiated cross-linked XLPE insulation?
A5: Electron beam irradiation cross-linking technology increases the maximum continuous working temperature of the cable from 70 °C (ordinary PVC cable) to 90 °C, and greatly improves the UV resistance, ozone resistance and flame retardancy of the insulation material, adapting to long-term harsh outdoor operation.

Q6: Why choose 4.0 mm² cable instead of 2.5 mm² for photovoltaic strings?
A6: 2.5 mm² cables are only suitable for string systems with current below 25 A and short laying distances. When the string current exceeds 25 A or the laying distance exceeds 30 m, 4.0 mm² cables need to be used. It can control the system voltage drop within 1% and reduce line power loss during the 25-year service cycle of the photovoltaic system.

Q7: Can PV1-F cables be buried directly in soil?
A7: Direct buried laying in soil is not recommended. The rated working condition of this cable is outdoor fixed installation with ventilation and light transmission. If buried laying is required for engineering needs, the cable must be laid in a UV-shielded protective conduit, or a cable with additional PE outer sheath shall be selected.

Q8: Why must MC4 connectors be matched for use?
A8: MC4 (PV4) dedicated connectors have professional weatherproof sealing, positive and negative polarity anti-misinsertion design, and support 1.5 kV DC high-voltage operation. Only professional crimping tools can ensure the crimping accuracy and tightness. Manual twisting or ordinary terminals are the primary cause of loose connection and failure of photovoltaic DC arrays.

Q9: What is the maximum applicable string voltage of the cable?
A9: The cable’s rated maximum system voltage is 1.8 kV DC, which fully covers the 1500 V high-voltage string specification commonly used in modern large-scale photovoltaic power stations, and reserves a sufficient safety margin for the open-circuit voltage rise of components in low-temperature environments.

Q10: What is the service life of PV1-F cables?
A10: Under standard construction specifications, correct connector matching and avoiding long-term water accumulation immersion, the cable can achieve a 25-year stable outdoor service life, which is synchronized with the warranty cycle of conventional photovoltaic modules.

Q11: Can PV1-F cables be used for inverter AC output circuits?
A11: It is not applicable. PV1-F is a professional DC cable, which does not meet the grid-connected specification and grounding safety requirements of AC power circuits. The AC output side of the inverter must adopt special AC cables such as RV, BV or YJV.