MC4 Single-Core Solar Extension Cable with LSHF Insulation in 4mm² and 6mm² Sizes

This photovoltaic extension cable provides a dedicated connection solution for solar energy systems, enabling safe and reliable cable runs between panels, combiners, and inverters. Designed specifically for new energy applications, it features a construction that prioritises electrical performance and installation safety. Available in two industry-standard cross-sectional areas, 4mm² and 6mm², it allows installers to select the appropriate cable for the current demands of their specific array. The inclusion of low-smoke, halogen-free (LSHF) materials in the insulation and sheath offers a practical safety benefit, particularly for installations in roof spaces or other enclosed areas. With colour-coded options in black and red and a choice of lengths from 1 to 10 metres, this cable delivers the necessary flexibility for a clean and organised solar installation.

Features and Construction

The cable is engineered for the specific demands of photovoltaic systems, where durability and consistent performance are key. Its design incorporates materials chosen for their functional properties in an outdoor, electrical environment.

Material and Build

The conductor is made from tinned copper wire, which provides excellent conductivity for transmitting DC power from solar panels. The tinning process offers a layer of protection against oxidation on the copper, which can be beneficial for long-term connection integrity in varying weather conditions. The insulation and outer sheath are both constructed from low-smoke, halogen-free (LSHF) compound. This material choice is significant for safety; in the event of a fire, LSHF cables are designed to emit very low levels of smoke and no corrosive halogen gases, reducing risks to both property and personnel.

Size and Practical Fit

This cable is offered in two common nominal cross-sectional areas: 4mm² and 6mm². The 4mm² size is often suitable for typical residential panel strings, while the 6mm² version can handle higher current flows, making it appropriate for longer runs or commercial installations. The maximum outer diameter ranges from 2.5mm to 6mm, which is dependent on the chosen cross-section. This compact profile aids in neat cable management within trunking or along mounting rails. The availability of five set lengths—1m, 2m, 3m, 5m, and 10m—allows installers to minimise waste and select the exact length needed for a tidy connection between specific points in the array.

Uses and Placement

As a specialised component, this cable has a clear primary application but offers versatility within that domain. Its specifications make it a go-to choice for both professional installers and knowledgeable DIY solar enthusiasts.

Event or Professional Use

For professional solar installation companies, this cable serves as a reliable, specification-led component for residential and small commercial projects. The LSHF insulation is a value-add that can align with building safety standards and installer best practices. The choice between 4mm² and 6mm² allows professionals to correctly size cables for the system design, optimising performance and ensuring compliance with electrical regulations. The pre-defined lengths help with accurate project planning and inventory control.

Everyday Home Use

For homeowners expanding an existing solar array or undertaking a DIY installation, this cable provides a ready-made, safe extension solution. The colour coding with red and black options simplifies the process of identifying positive and negative lines, reducing the chance of wiring errors. Selecting the correct pre-cut length can help achieve a clean-looking installation without the need for cutting and terminating longer cable reels, which requires specialist tools.

Benefits and Buying Value

The value of this product lies in its focused design, material safety features, and the convenience of its available options. It addresses common needs in solar system setup with a practical, no-fuss approach.

Reuse and Low Maintenance

Once installed as part of a correctly designed system, this cable requires virtually no maintenance. The robust LSHF sheath protects the tinned copper core from environmental factors, contributing to a long service life. Its dedicated use in photovoltaic systems means it is built for continuous outdoor exposure to sunlight and temperature fluctuations, offering reliable performance season after season without degradation under normal operating conditions.

Why Choose This Product

Choosing this specific solar extension cable brings several concrete advantages. The LSHF insulation is a proactive safety feature that goes beyond basic electrical requirements. The availability of two cross-sections (4mm² and 6mm²) ensures you can match the cable to your system's technical needs rather than compromising. Furthermore, the range of set lengths and colour options provides immediate practical benefits during installation, saving time and reducing the potential for mistakes compared to sourcing and preparing cable from a bulk reel.