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Black solar cable 25m 4mm

Description

Product information

The Solar Cable SOLS425 (25 metres, 4mm²) in black is the ideal solution for flexible and professional cabling of your photovoltaic system. With a length of 25 metres, this cable by the metre is perfectly suited for medium-sized projects, such as connecting module strings to the inverter or installing balcony power plants. The black colour serves as standard-compliant marking of the negative pole (-), making installation clear and safe.

Manufactured according to the strict international standard IEC 62930, this cable meets the highest quality standards for long-term use in modern PV systems up to 1500V DC. The high-quality XLPO double insulation and the tinned copper conductor guarantee efficient energy transmission and maximum service life, even under demanding environmental conditions.

Highlights at a glance

  • Certified safety: Complies with standard IEC 62930 (H1Z2Z2-K) for permanent use in photovoltaic DC systems up to 1500V.
  • Optimum project length: 25 metres in one piece allow customised cuts for individual connection paths without unnecessary interfaces.
  • Clear polarity: The black outer sheath provides a clear visual marking of the negative cable and prevents mix-ups during installation.
  • Weatherproof & Robust: The UV-resistant and ozone-resistant double insulation protects the cable for decades from embrittlement caused by weather influences.
  • Corrosion-protected conductor: Tinned electrolytic copper ensures permanently low contact resistance and provides effective protection against oxidation.
  • Wide temperature range: Safe operation even under extreme climatic conditions from -40°C to +90°C (short-term peaks up to +120°C).

Areas of application

The SOLS425 is versatile for private and commercial PV projects:

  • House & Roof systems
    • Ideal for string cabling and connection to the charge controller or inverter over medium distances.
  • Balcony power stations
    • Perfect for connecting the solar modules to the micro-inverter when it is mounted in a staggered or protected position indoors.
  • Motorhomes & Marine
    • Reliable cabling for self-sufficient systems requiring resistance to vibrations, moisture and UV radiation.

Installation & Safety Instructions

  • Professional crimping
    • As it is cable by the metre, exclusively high-quality MC4 connectors should be used for the connection. Gas-tight crimping with a special crimping tool is essential for long-term safety.
  • Parallel cable routing
    • Route the black negative cable as parallel and as close as possible to the red positive cable to minimise electromagnetic interference (induction loops).
  • Mechanical protection
    • Lay the cable at sharp edges in such a way that the insulation is not damaged. Use corrugated pipes or cable ducts when passing through walls.
 

Features

Model / SKU**SOLS425**
Conductor cross-section**4.0 mm²**
Delivery form**25-metre ring**
ColourBlack (negative pole)
Rated voltageDC: 1.5 kV / Max. 1.8 kV
Conductor materialCopper, tinned (fine-stranded)
Temperature range-40°C to +90°C (ambient)
Standardisation**IEC 62930 / EN 50618**
Special featureHalogen-free & flame-retardant
 

FAQs about the solar cable black 25m 4mm²

What is the advantage of IEC 62930 certification?

Maximum longevity in PV systems. This standard ensures the cable is halogen-free, flame-retardant and specially tested for resistance to high DC voltages and intensive UV radiation. It is considerably more robust than standard conventional cables.

Can I also lay the cable indoors?

Yes. Thanks to the flame-retardant and halogen-free properties of the XLPO insulation, the SOLS425 can be laid safely in buildings to transfer energy to the inverter room.

Does the cable fit into standard MC4 plugs?

Yes. The cable with 4mm² cross-section fits into all standard MC4 connectors designed for the 4–6mm² range. Ensure a clean installation for a watertight connection.
Properties
Cross-section of the conductor: 4.00 mm²
Nominal voltage: 0.6 / 1kV AC
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SOLR425
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