Solar cable black 25m 6mm² IEC62930 – SOLS625 for efficient PV applications

The solar cable SOLS625 (25 metres, 6mm²) in black is the ideal solution for photovoltaic installations that require high current carrying capacity and minimal energy losses. With a length of 25 metres and a reinforced cross-section of 6mm², this cable offers the perfect balance between flexibility and performance—whether for string cabling on the roof or connecting powerful balcony power systems. The black colour serves as the standard-compliant identification of the negative pole (-).

Manufactured according to the international standard IEC 62930, this cable meets the strictest requirements for safety and durability in modern PV systems up to 1500V DC. The generous cross-section ensures that heat generation is minimised even in modules with high output currents and that the efficiency of your system is maximised.

Highlights at a glance

• Certified safety: Complies with IEC 62930 (H1Z2Z2-K) standard for continuous use in photovoltaic DC systems up to 1500V.
• High efficiency: The 6mm² cross-section significantly minimises electrical resistance and reduces voltage drops compared to standard cables.
• Optimal project length: 25 metres enable custom cuts for medium distances without unnecessary joints or plug connections.
• Weather & UV-resistant: The high-quality XLPO double insulation protects the cable for decades against embrittlement caused by sunlight, ozone and extreme weather conditions.
• Corrosion-protected conductor: Fine-stranded, tinned copper provides lasting top conductivity and effectively protects against oxidation in moist environments.
• Extreme temperature range: Reliable operation under the harshest conditions from -40°C to +90°C (short-term peaks up to +120°C).

Areas of application

The SOLS625 is versatile for demanding PV projects:

• Modern roof systems
  • Ideal for connecting high-performance modules (500Wp+) to the inverter for loss-free transport of high currents.
• Balcony power systems & stand-alone systems
  • Perfectly suitable if the inverter or charge controller is installed somewhat further away and every watt of power is to be preserved.
• Motorhomes & marine
  • Robust cabling for self-sufficient systems where vibration, moisture, and high loads are factors.

Installation & safety instructions

• Professional preparation
  • For this cross-section, only use MC4 connectors that are explicitly approved for 6mm² cables. A gas-tight crimp is essential for long-term safety.
• Observe bending radii
  • Despite the high flexibility of the fine-stranded conductors, the cable should not be bent below the minimum permitted bending radius in order to preserve the insulation.
• Mechanical protection
  • Use protective conduits or edge protection profiles at feed-throughs or sharp edges to permanently ensure the integrity of the double insulation.

Specifications

FAQs about solar cable black 25m 6mm²

Is 6mm² necessary for 25 metres in length?

It is advisable.

• Especially with modern modules delivering currents from 13A to 18A, 6mm² offers significantly more safety against heating and reduces voltage drops. It is a future-proof choice for maximum yields.

Can the cable be installed indoors?

Yes.

• Thanks to the flame-retardant and halogen-free properties of the XLPO insulation, the SOLS625 can be safely installed in buildings to transmit energy from the roof to the plant room.

Does the cable fit in standard MC4 connectors?

Only in suitable 6mm² versions.

• There are MC4 connectors for different cross-section ranges. Make sure to use connectors designed for 4–6mm² so that strain relief and sealing are ensured.