143 lines
8.2 KiB
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143 lines
8.2 KiB
Plaintext
---
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title: 'Securing the future with H1Z2Z2-K: Our solar cable for Intersolar 2025'
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date: '2025-05-01T09:40:37'
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featuredImage: /uploads/2025/04/inter-solar.webp
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locale: en
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category: Kabel Technologie
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---
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# Securing the future with H1Z2Z2-K: Our solar cable for Intersolar 2025
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Around [Intersolar Europe](https://www.intersolar.de/start), the topic of photovoltaics is once again moving into the spotlight. A great reason to take a closer look at a special solar cable developed specifically for use in PV systems – robust, weather-resistant, and compliant with current standards.
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<VisualLinkPreview
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url="https://youtu.be/YbtdyvQFoVM"
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title="Intersolar Europe 2025 | Save The Date | May 7–9, 2025"
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summary="As the world’s leading exhibition for the solar industry, Intersolar Europe demonstrates the enormous vitality of the solar market. For more than 30 years, i…"
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image="https://i.ytimg.com/vi/YbtdyvQFoVM/maxresdefault.jpg?sqp=-oaymwEmCIAKENAF8quKqQMa8AEB-AH-CYAC0AWKAgwIABABGEQgSyhyMA8=&rs=AOn4CLBx90qdBxgYcyMttgdOGs3-m0udZQ"
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/>
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What lies behind the design, which selection criteria matter for solar cables, and why every detail counts in photovoltaic projects – that’s exactly what this article is about.
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## What is the H1Z2Z2-K 6mm² solar cable?
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The H1Z2Z2-K 6mm² is a highly specialized, electron beam cross-linked solar cable developed for the specific demands of photovoltaic systems. In practice, that means: this cable transports the generated direct current (DC) from the solar module to the inverter – reliably, efficiently, and most importantly: safely.
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### Why 6mm²?
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The 6mm² cross-section has proven to be particularly powerful and versatile in PV systems. It offers a great balance between current-carrying capacity and voltage drop – especially over longer cable runs, which is often the case in ground-mounted systems or more complex roof structures.
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### Construction and choice of materials
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What makes the H1Z2Z2-K special is its material composition. This cable does not use traditional PVC insulation but instead halogen-free, flame-retardant, and cross-linked polyolefins. These offer:
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- **High thermal resistance** – even under direct sunlight
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- **UV- and ozone-resistant outer sheath**, ideal for open installation
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- **Mechanical durability** against abrasion, compression, and bending
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### More than just a cable
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While standard cables quickly reach their limits under extreme temperatures, mechanical stress, or UV exposure, the H1Z2Z2-K 6mm² stays strong – for decades. It was specifically developed according to EN 50618 to meet the extreme conditions of photovoltaic systems – whether at 3,000 meters in the Alps or under 50 °C in the scorching sun of Southern Europe.
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### Application areas at a glance:
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- **DC connection from solar modules to string boxes or inverters**
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- **Integration into storage systems**
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- **Use in rooftop, ground-mounted, and agri-PV installations**
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- **Suitable for indoor use, open installation, cable ducts, and underground installation**
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In short: the H1Z2Z2-K 6mm² is no off-the-shelf solution – it’s a specialized energy cable for an industry that doesn’t compromise.
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## Technical specifications and construction in detail
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One of the strengths of this cable lies in its material structure and the resulting thermal and mechanical durability.
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<table>
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<thead>
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<tr>
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<th>**Property**</th>
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<th>**Value / Description**</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>Conductor</td>
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<td>Fine-stranded, tinned copper conductor (Class 5)</td>
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</tr>
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<tr>
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<td>Rated voltage</td>
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<td>1500 V DC (compliant with EN 50618)</td>
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</tr>
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<tr>
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<td>Test voltage</td>
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<td>6.5 kV</td>
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</tr>
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<tr>
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<td>Operating temperature range</td>
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<td>-40 °C to +90 °C (conductor max. +120 °C)</td>
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</tr>
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<tr>
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<td>Insulation and sheath</td>
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<td>Cross-linked polyolefin, halogen-free</td>
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</tr>
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<tr>
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<td>Outer diameter (6mm²)</td>
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<td>approx. 6.4 mm</td>
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</tr>
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<tr>
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<td>Bending radius</td>
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<td>min. 4 × cable diameter</td>
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</tr>
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<tr>
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<td>Max. current capacity (free laid)</td>
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<td>up to 70 A (depending on ambient temperature)</td>
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</tr>
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</tbody>
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</table>
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## Standards and certifications: EN 50618 & more
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The H1Z2Z2-K 6mm² meets all key standards for use in photovoltaic systems. These standards ensure safety, durability, and compliance with legal requirements.
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### EN 50618 – European standard for solar cables
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This standard defines technical requirements for materials, electrical characteristics, and mechanical resilience. It mandates:
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- Halogen-free, flame-retardant insulation
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- UV- and weather-resistant materials
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- Rated voltage up to 1500 V DC
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- Service life of over 25 years
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### TÜV 2 PfG 1169/08.2007
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An additional quality inspection by TÜV Rheinland confirms:
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- Resistance to ozone and moisture
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- Long-term performance under real conditions
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- Thermal load capacity
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### CPR classification (Construction Products Regulation)
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For building installations, fire behavior is crucial. The H1Z2Z2-K reaches B2ca or Cca depending on the variant:
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- Low smoke emission
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- Flame retardancy
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- No corrosive fire gases
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Conclusion: The comprehensive compliance with standards makes the H1Z2Z2-K 6mm² a reliable and legally secure solution for all professional PV applications.
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## Areas of application: Where the H1Z2Z2-K 6mm² shows its strengths
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Whether out in the open, in commercial buildings, or integrated into hybrid power plants – this cable delivers reliably.
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### Typical fields of application:
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- Ground-mounted solar parks
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- Industrial rooftops and carports
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- Agri-PV systems (e.g. above fields, animal barns)
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- Off-grid PV systems
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- Inverter connections
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- Storage systems and DC networks
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The H1Z2Z2-K also proves its worth in special applications, such as near salty air zones or in environments with extreme temperature fluctuations.
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## Underground installation of PV cables – what to consider
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One major advantage of the H1Z2Z2-K is its suitability for direct burial – without protective conduit. However, certain rules still apply:
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### Best practices for installation:
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- Bedding in sand or fine-grained material
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- Protection from sharp-edged stones by replacing with gravel
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- Installation with minimum spacing from other cables
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- Marking with warning tape 30 cm above the cable
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- Avoid tensile stress during installation
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**Important:** For projects spanning several hundred meters, a voltage drop calculation is worthwhile – 6mm² isn’t always the best fit by default.
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<hr />
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##
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## FAQ: The most frequently asked questions about H1Z2Z2-K solar cables
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**What does H1Z2Z2-K mean?**<br />This designation refers to a cable type with specific insulation materials and properties according to EN 50618, suitable for DC voltage up to 1500 V.
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**Is the cable approved for underground installation?**<br />Yes, including direct burial without additional protective conduits.
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**Which cross-sections are available?**<br />Typically: 1.5 / 2.5 / 4 / 6 / 10 mm² – 6mm² is the proven all-rounder.
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**Why halogen-free?**<br />No toxic fumes are released in the event of fire – ideal for sensitive building environments.
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**What is the maximum installation length for 6mm²?**<br />Depends on current demand and voltage drop – often sensible between 30 m and 100 m.
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## Conclusion: Quality that makes the difference
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The H1Z2Z2-K 6mm² stands for technical maturity and a consistent focus on professional use in photovoltaic systems. From high thermal and voltage resistance to verified compliance with standards – this cable combines everything today’s modern energy infrastructure demands.
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What really stands out is its versatility: whether on rooftops, in underground installations, or in large-scale PV plants – the H1Z2Z2-K delivers reliability and an impressive service life. It makes a direct contribution to the economic efficiency and sustainability of solar systems.
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Further information, technical details, and ordering options can be found on the product page: 👉 [To the H1Z2Z2-K at KLZ](/products/solar-cables/h1z2z2-k/)
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All the key details about Intersolar Europe can be found here:
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<VisualLinkPreview
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url="https://www.intersolar.de/messe-kompakt?ref=m5f53a666f3a2cb2fee160554-s65eec4739108db093b003a02-t1746004197-cf3c592e7"
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title="Intersolar Europe at a Glance"
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summary="Intersolar Europe | Exhibition Quick Facts | Date, Venue, Opening Hours, Exhibitors"
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image="https://www.intersolar.de/media/image/6311c9ee98bbc414b66305e2/750"
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/>
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