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ZION Cable Academy · Solar PV Cabling (EN Standard)

H1Z2Z2-K Single Core Solar Cable (EN 50618): Technical Data & Engineer’s Selection Rules

EU-compliant photovoltaic cable for outdoor PV interconnection wiring—UV resistant, halogen-free, flame retardant XLPO construction with long-life reliability for rooftop and utility-scale solar.
PV System EngineersEPC / ContractorsProcurementInstallersDistributorsSolar Farm O&M
  • Standard: EN 50618 (H1Z2Z2-K) — commonly requested for EU projects with higher environmental expectations.

  • Mainstream sizes: 4.0 / 6.0 / 10.0 mm² — verify with current + run length + voltage drop limits.

  • Risk control: insist on UV + weather resistance, halogen-free XLPO jacket, and pass/fail test benchmarks (AC 6500V/5 min, ozone, damp-heat, -40°C bending).

 

1) Product Overview

H1Z2Z2-K single core solar cable is a photovoltaic interconnection cable designed for long-term outdoor PV installations.    It is widely specified in European solar projects where halogen-free flame retardancy and strong environmental durability are required.
Field reality
Most PV cable failures in the field start at the jacket level (UV aging, cracking, chalking), not at the conductor. Material system matters as much as size.
Practical rule
Procure by EN 50618 + verified tests, then select the conductor size by current, run length, and voltage drop target.
 

2) Standard & Compliance (EN 50618)

H1Z2Z2-K is defined under EN 50618:2014 and is commonly supplied under EU/TÜV project requirements.
ItemSpecificationEngineering Meaning
Nominal voltageDC 1.5kV / AC 1.0/1.0kVSupports higher DC system designs common in modern PV arrays.
Ambient temperature-40°C ~ +90°COutdoor installation reliability across climates.
Max conductor temperature+120°CThermal headroom for current peaks and heat accumulation.
Service life≥ 25 years (-40°C ~ +90°C)Aligned with PV plant lifecycle expectations.
Key takeaway
If your project is in Europe (or requires EU-aligned compliance), specifying H1Z2Z2-K (EN 50618) reduces inspection and documentation risk compared to generic “PV cable” descriptions.
 

3) Cable Structure

Construction (Typical)

  • Conductor: Annealed electro-tinned fine copper strands, bunched to meet Class 5 flexibility (IEC 60228 / VDE 0295)

  • Insulation: XLPO (cross-linked polyolefin)

  • Jacket: UV resistant, cross-linkable, halogen-free, flame retardant compound

LayerMaterialWhy it matters
ConductorElectro-tinned copper, fine strandedCorrosion resistance + stable termination performance in outdoor conditions.
InsulationXLPOHigh temperature performance and electrical stability.
JacketHalogen-free, flame retardant XLPO compoundUV, ozone, and weather resistance for multi-decade outdoor exposure.
 

4) Electrical & Environmental Properties

ParameterValueNotes
Withstand voltageAC 6500V / 5 minNo breakdown.
Insulation resistance (70°C)≥ 1000 MΩ·kmStability under temperature.
Min. bending radius5 × DInstallation handling.
Low-temp bending-40°C / 16hNo crack.
Ozone resistance(200±50)×10-6 / 72hNo crack.
 

5) Technical Data Table (H1Z2Z2-K Single Core, mm²)

Consolidated size table for H1Z2Z2-K single core solar cable. Cable diameters are subject to ±5% manufacturing tolerance.
Part No.Size (mm²)Conductor (n×mm)Insulation (mm)Jacket (mm)Overall Ø (mm)Resistance (Ω/km)Current (A)
71940001.530×0.250.750.904.9±0.213.730
71940012.550×0.250.751.005.5±0.28.2141
71940024.056×0.300.751.056.20±0.25.0955
71940036.084×0.300.751.057.0±0.23.3970
719400410.080×0.400.901.208.30±0.31.9598
719400516.0128×0.400.901.209.45±0.21.24132
719400625.0200×0.400.901.2010.75±0.20.795250
 

6) Decision Rules / Engineer’s Shortcut

Use the table below to pick the cable size faster while controlling compliance and lifecycle risk.
Decision PointBest PracticeWhat to Lock in RFQ/POAvoid
ComplianceSpecify EN 50618 H1Z2Z2-K for EU projectsStandard + voltage rating + proof documentsGeneric “PV cable” with unclear compliance
Mainstream sizingStart from 4 / 6 / 10 mm²Current + length + acceptable voltage dropOver/under-sizing without run analysis
Outdoor durabilityXLPO halogen-free flame retardant jacketUV / ozone / damp-heat / -40°C bending benchmarksPVC jackets used outdoors long-term
 

7) Typical Applications

ApplicationTypical ConnectionCommon Size RangeNotes
Rooftop PVModule strings, inverter DC input4 / 6 mm²Focus on routing, bending radius, and UV exposure.
Commercial PVLonger string runs, combiner-to-inverter6 / 10 mm²Validate voltage drop and thermal rise.
Solar FarmArray interconnection wiring10 / 16 mm²Higher aggregation currents and harsher exposure.
 

8) Conclusion

H1Z2Z2-K single core solar cable (EN 50618) is the practical choice for EU-aligned PV projects where long-term outdoor durability and compliance documentation matter. For fast selection, lock the standard first, then select the conductor size by current and run length—most projects center around 4 / 6 / 10 mm².
FINAL CTA — Request H1Z2Z2-K Datasheet & Quotation
Please share: required size (mm²), voltage rating, jacket color, reel length, quantity, and delivery destination. ZION will recommend the best-fit specification and provide quotation & lead time.


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