6mm2 (10AWG) 40A Twin Solar Cable

10 AWG (6 mm²) Twin Solar Cable is a high-quality, double-insulated PV cable designed for reliable power transfer in solar installations. Built with fine-strand tinned copper conductors and durable UV-resistant insulation, it delivers excellent flexibility, low voltage drop, and long service life in harsh outdoor environments.

Ideal for connecting solar panels to MPPT controllers or combiner boxes, this cable is perfectly suited to higher-current arrays, parallel strings, and longer cable runs where efficiency and safety matter.

Typical Ratings (Conservative)

• Continuous current: 35–45 A

• Short-term / peak: up to ~50–55 A (not for continuous use)

These ratings assume:

• Free air or clipped installation

• Normal ambient temperatures

• Single cable run (not heavily bundled)

Practical Solar Use Guidance

Common applications

• Parallel solar strings to MPPT controller

• Combiner box to MPPT controller

• Higher-current PV runs where voltage drop must be minimised

Typical pairing

• 30 A–40 A MPPT controllers (PV side)

• 20 A–30 A fuses/breakers (array dependent)

Many modern panels have ~10–13 A Isc.
Two strings in parallel can approach 20–26 A, where 6 mm² becomes the better choice over 4 mm².

Installation Factors That Affect Rating

Current capacity must be de-rated when:

• Cables are run in hot roof spaces

• Multiple PV cables are bundled together

• Long conduit runs restrict airflow

In these cases, stepping up to 10 mm² may be appropriate even if current alone is within limits.

Quick Rule of Thumb

• Single PV string: 4 mm² is usually sufficient

• Two or more strings in parallel: 6 mm² recommended

• High-power arrays / long runs: consider 10 mm²

Summary

10 AWG (6 mm²) double-insulated twin solar cable

• Continuous rating: 35–45 A

• Typical PV use: 20–30 A

• Designed for PV installations to EN 50618 / IEC 62930