MC4 Solar Extension Cable for Photovoltaic Systems in 4mm² and 6mm² Sizes

This photovoltaic extension cord is designed specifically for new energy applications, providing a ready-to-use connection between solar panels and other system components. It features industry-standard MC4 connectors, which are widely used for secure, weather-resistant connections in solar installations. The cable is a single-core construction, with a tinned copper wire core that ensures reliable electrical conductivity. It is offered in two standard nominal cross-sections, 4mm² and 6mm², allowing you to select the appropriate gauge for your system's current capacity. With five length options available, from a compact 1 metre up to a 10 metre run, it can accommodate various layout distances within an array or to a combiner box. The insulation and outer sheath are made from a low-smoke, halogen-free compound, a material choice that reduces the emission of toxic fumes in the event of a fire, making it suitable for use in buildings or enclosed spaces.

Features and Construction

This cable is built for the practical demands of solar energy systems, focusing on reliable connectivity and safety. Its construction is based on common specifications for photovoltaic wiring.

Material and Build

The conductor is made from tinned copper wire, which provides good conductivity while offering some protection against corrosion. The key feature of the cable's construction is its insulation and sheath material, which is specified as low-smoke and halogen-free. This material is designed to limit the release of dense smoke and corrosive halogen gases if exposed to high heat or flame, contributing to safer installation environments. The cable is terminated with MC4 connectors, a common interface that allows for tool-less connection and disconnection between panels and extension leads.

Size and Practical Fit

The cable comes in two primary electrical sizes: a 4mm² cross-section and a 6mm² cross-section. The choice between these affects the current-carrying capacity of the cable. It is also offered in a range of physical lengths: 1 metre, 2 metres, 3 metres, 5 metres, and 10 metres. This selection allows for matching the cable length closely to the required distance, minimising excess cable that needs to be managed. The maximum outer diameter of the wire is between 2.5 mm and 6 mm, and the insulation thickness is manufactured to a reference standard.

Uses and Placement

This cable is intended for use within photovoltaic power generation systems, connecting the DC output of solar panels to other system parts.

Event or Professional Use

For professional solar installers or for permanent residential and commercial systems, this pre-fitted MC4 cable simplifies the connection process. The availability of different lengths helps in creating neat, efficient cable runs without the need for custom cutting and crimping on site for every connection. The two colour options, black and red, can be used to differentiate between positive and negative circuit strings or to colour-code different array sections, aiding in installation and future troubleshooting.

Everyday Home Use

For domestic solar panel owners, this cable can serve as a replacement or extension lead for existing systems. The pre-attached connectors mean it can be used directly without specialised crimping tools. Selecting the correct cross-section (4mm² or 6mm²) is important to match the original system cabling and ensure safe operation. The low-smoke halogen-free insulation is a practical safety feature for cables that may run through lofts, wall cavities, or alongside a building.

Benefits and Buying Value

The value of this product lies in its readiness for use and the range of options that allow it to be matched to specific project needs.

Reuse and Low Maintenance

The MC4 connectors allow for disconnection and reconnection, meaning the cable can be repositioned or reused if a system layout changes. The tinned copper core and robust insulation are designed for long-term outdoor exposure typical in solar applications. The cable's voltage rating of up to 35 kV covers standard low and medium voltage photovoltaic system requirements.

Why Choose This Product

This cable offers a straightforward solution for extending solar panel connections. The main choice points are the cross-sectional area (4mm² or 6mm²) for electrical capacity and the length (from 1M to 10M) for physical reach. The low-smoke halogen-free insulation is a considered safety feature, and the black or red colour provides a simple visual identifier. It is a component built for a specific function within a renewable energy system.