Solar cable red 25m 4mm² IEC62930 – SOLR425 for safe PV cabling

The SOLR425 solar cable (25 metres, 4mm²) in red is the perfect choice for flexible cabling of your photovoltaic system. With a length of 25 metres, this cable is ideal for medium-sized projects, such as connecting module strings to the inverter or installing balcony power stations with slightly longer routes. The red colour serves as a standard-compliant marking of the positive pole (+), making the installation clear and safe.

Manufactured in accordance with the strict standard IEC 62930, this cable fulfils the highest safety standards for permanent use in modern PV systems. The combination of high-quality tinned copper conductor and robust double insulation guarantees efficient energy transmission and maximum service life, even under demanding environmental conditions.

Highlights at a glance

• Certified safety: Complies with the international standard IEC 62930 for solar cables, which guarantees top quality and fire protection.
• Optimal length: 25 metres allow for custom cuts for bespoke connections without unnecessary joints.
• Clear identification: The red outer sheath ensures clear identification of the positive lead and prevents confusion during installation.
• Extremely robust: The double insulation made from cross-linked special polymer is UV-resistant, ozone-resistant and resistant to weathering.
• Durable conductor: Tinned electrolytic copper provides effective protection against corrosion and ensures permanently low contact resistances.
• High temperature resistance: Safe to use in a range from -40°C to +90°C, conductor temperatures of up to +120°C are permitted for short periods.

Areas of application

The SOLR425 is versatile for private and commercial PV projects:

• Home & rooftop systems
  • Ideal for string cabling and connection to the charge controller or inverter over medium distances.
• Balcony power stations
  • Perfectly suited for connecting the solar modules to the microinverter when it is mounted indoors or in a remote location.
• Motorhomes & Marine
  • Reliable wiring for solar panels on vehicle roofs or boats, where resistance to vibrations and moisture is required.

Installation & safety instructions

• Professional crimping
  • As this is cut by the metre, only high-quality MC4 connectors should be used for connection. Ensure gas-tight crimping with a suitable crimping tool.
• Mechanical protection
  • Lay the cable on sharp edges (e.g. on profile rails) always in such a way that the insulation is not damaged. Use edge protection or corrugated pipes for this.
• Observe bending radii
  • Avoid bends that are too tight in the cable to prevent damage to the fine stranded copper conductors and to maintain the integrity of the insulation.

Features

FAQs on the red 25m 4mm² solar cable

What does certification to IEC 62930 mean?

Tested quality for PV systems. This standard defines the requirements for halogen-free, low-smoke and insulated cables for photovoltaic systems. It ensures that the cable is specifically designed for the high DC voltage and UV exposure in outdoor use.

Can I lay the cable indoors too?

Yes. Thanks to the flame-retardant and halogen-free properties of the insulation, the SOLR425 can be installed indoors without hesitation to carry energy from the roof to the inverter in the basement or technical room.

Why should I choose 4mm² instead of 6mm²?