H1Z2Z2-K 6.0mm² TUV 1500V DC Solar Main Cable UV Resistant PV Photovoltaic Wire

Cable Designation & Meaning

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

Note on designation: H1Z2Z2-K is the EN 50618 / TÜV 2 PfG 1169/08.2007 designation. It is functionally equivalent to PV1-F 6.0 mm² but uses the harmonized cable coding system.

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

H1Z2Z2-K 1×6.0 mm² — Harmonised Photovoltaic DC Cable Specification & Engineering Data

1. Product Overview & Rating Summary. H1Z2Z2-K 1×6.0 is the harmonised European photovoltaic DC cable rated 0.6/1.0 kV DC (max system voltage 1.8 kV), built and certified to EN 50618 / HD 6036 with the HAR certification mark. Unlike PV1-F's single-layer insulation that doubles as the weather jacket, H1Z2Z2-K uses a double-layer construction: inner halogen-free XLPE insulation plus outer halogen-free cross-linked polyolefin sheath. This separation of functions — electrical insulation inside, weather protection outside — gives better long-term outdoor reliability. The 6.0 mm² cross-section is the choice for commercial rooftop and ground-mount PV strings with longer home-runs (20–40 m) where voltage drop must stay within limits. Finished diameter is about 6.4 mm, mass about 68 kg/km.

2. Layer-by-Layer Construction (Conductor to Outer).

3. Electrical Characteristics. The 6.0 mm² tinned-copper Class 5 conductor uses 50 × 0.40 mm tinned wires, giving a maximum DC resistance of 3.08 Ω/km at 20 °C — about 31% lower than the 4.0 mm²'s 4.49 Ω/km. Routine proof is 3.5 kV AC / 5 minutes (or 6.5 kV DC / 15 minutes). Insulation resistance ≥ 250 MΩ·km. With the single core in free air at 30 °C, reference loading is about 60 A; at 60 °C ambient the rating derates to about 47 A. The voltage drop on a 100 m two-pole run at 60 A is about 7.3 V loop. Conductor loss at 60 A is about 4.2 W per metre at 90 °C.

Insulation & Sheath Data

Electrical Parameters

Reference values: 6.0 mm² Cu at 56 A, DC 1000 V → max DC power ≈ 56 kW per string (2 strings in parallel = 112 kW). Voltage drop at 56 A ≈ 19.0 mV/A·m (≈1.90% per 10 m at 56 A, 1000 V). At 70 A → ≈ 23.7 mV/A·m.

Temperature Characteristics

4. Thermal Response & Flame Behaviour. Halogen-free cross-linked XLPE sustains a 90 °C continuous conductor temperature, with short-circuit capability up to 250 °C for ≤ 5 s. The cable is rated for service ambients between −40 °C and +90 °C and is cold-bend tested at −40 °C. The black carbon-loaded outer sheath is UV-resistant (1000 h UV preconditioning), ozone-resistant, and flame-retardant to IEC 60332-1 (single-cable vertical flame, self-extinguishing). The Z2 designation means the cable releases no halogen acid gas (IEC 60754, ≤ 0.5% HCl equivalent) and low smoke (IEC 61034, light transmittance ≥ 60%) when burned.

Fire Performance (H1Z2Z2-K — Standard)

5. Installation Practice & Handling. Minimum bend radius is 4 × OD (≈ 26 mm) for fixed installation, 6 × OD (≈ 38 mm) if repeatedly flexed. The larger 6.4 mm diameter makes the cable stiffer than 4.0 mm² — plan routing accordingly and use larger radius bends. Use PV4 / MC4-type connectors crimped with the dedicated PV crimping tool. Polarity (+ / −) and the HAR mark are printed along the black sheath. Laying temperature must not fall below −40 °C. At about 6.8 kg per 100 m, the cable is supplied in 100 m coils — suitable for commercial rooftop and ground-mount PV strings with longer home-runs.

Mechanical & Installation Parameters

6. Typical Service Applications. This 6.0 mm² double-layer build is the default interconnection cable for: commercial rooftop PV with longer string home-runs, utility-scale ground-mount PV plants, large-scale PV plants, industrial PV, and main PV DC trunking between strings and combiner boxes. The 6.0 mm² cross-section is specified when the string home-run exceeds 20 m and voltage drop must stay below 1.5% — the 4.0 mm² would incur excessive voltage drop on these longer runs.

7. Testing & Quality Assurance Regime. Routine tests on every coil include conductor DC resistance ≤ 3.08 Ω/km at 20 °C, the 3.5 kV AC / 5 min withstand, the 6.5 kV DC / 15 min withstand, insulation resistance ≥ 250 MΩ·km, dimensional check (inner insulation ≥ 0.8 mm; outer sheath ≥ 0.8 mm; OD ≈ 6.4 mm), and visual marking. Type tests include UV preconditioning (1000 h), thermal ageing (135 °C / 168 h), cold bend at −40 °C, heat shock at 150 °C, single-cable flame per IEC 60332-1, halogen acid gas per IEC 60754, smoke density per IEC 61034, ozone resistance, abrasion resistance, and tinned-copper strip check.

Cable Parameters

Cable Test Parameters

Cable Cross Section Structure

Construction Description

8. Factory Advantages

9. Packaging, Storage & Logistics. Standard delivery is 100 m per coil, also 200 m coils or drums on request. Each coil carries continuous marking: H1Z2Z2-K, 1×6.0, 0.6/1.0 kV, + / −, HAR, supplier identity, production year, and sequential metre marks. Storage should be in dry, covered premises at −20 to +40 °C, shielded from direct sunlight.

10. Procurement Specification. State "H1Z2Z2-K 1×6.0 mm² 0.6/1.0 kV DC" together with the required length. Always order PV4 / MC4-type connectors and the dedicated crimping tool at the same time. Always request the factory test certificate. Specify 6.0 mm² when string home-runs exceed 20 m or when string currents approach 55–60 A; for shorter home-runs on residential rooftop, 4.0 mm² is sufficient and lighter.

11. Cable Industry FAQ.

• Q1: What is the difference between H1Z2Z2-K and PV1-F? Both are PV DC cables rated 0.6/1.0 kV. PV1-F uses a single-layer XLPE insulation that doubles as the weather jacket. H1Z2Z2-K uses a double-layer construction — inner halogen-free XLPE insulation + outer halogen-free cross-linked polyolefin sheath — giving better weather resistance and longer outdoor service life. H1Z2Z2-K also carries the HAR harmonised mark, recognised across all EU member states.
• Q2: Why use 6.0 mm² instead of 4.0 mm²? The 6.0 mm² has 31% lower DC resistance (3.08 vs 4.49 Ω/km), higher ampacity (60 vs 45 A), and lower voltage drop on long home-runs. It is specified when string home-runs exceed 20 m or when string currents approach 55–60 A.
• Q3: Why use 50×0.40 instead of 56×0.30 strands? The 6.0 mm² conductor uses 50 × 0.40 mm tinned wires (vs 56 × 0.30 mm for 4.0 mm²). The slightly larger individual strands keep the fine-strand Class 5 flexibility while carrying more current.
• Q4: Why use tinned copper? Tinning protects the copper strands against oxidation and atmospheric corrosion over decades of outdoor service.
• Q5: Why use MC4 connectors? MC4 (PV4) connectors are weather-sealed, polarised, and rated for 1.5 kV DC. They are crimped with the dedicated tool.
• Q6: What is the maximum string voltage? H1Z2Z2-K is rated for 1.8 kV DC system voltage, covering 1500 V PV strings.
• Q7: How long does it last? When properly installed with correct connectors, H1Z2Z2-K is designed for a 25-year outdoor service life matching the solar module warranty.
• Q8: Is the double-layer construction more expensive than single-layer? Yes — the extra outer sheath layer adds about 10–15% to the cost per metre vs single-layer PV1-F. It is worth the premium in commercial/utility installations where 25-year reliability is critical; for DIY residential, PV1-F is adequate.
• Q9: When should I choose 4.0 mm² vs 6.0 mm²? Choose 4.0 mm² for residential rooftop with short home-runs (< 15 m) and strings under 40 A. Choose 6.0 mm² for commercial rooftop, ground-mount, or longer home-runs where voltage drop matters.
• Q10: Can H1Z2Z2-K be used with PV1-F connectors? Yes — both use the standard PV4/MC4 connector interface. The connectors are interchangeable, but the crimping die must match the conductor cross-section (4.0 vs 6.0 mm²).
• Q11: What does the HAR mark mean? The HAR (harmonised) certification mark on H1Z2Z2-K means the cable meets a harmonised European standard recognised across all EU member states — no additional national certification is required when selling or installing in any EU country.