Solar Cable By the Metre

Twin Solar Cable Sold by the Metre

Order the exact length of twin solar cable your installation needs. This range covers two DC photovoltaic cables, 4mm² Twin 1000V PV1-F and 6mm² Twin 1500V IEC 62930. Both are sold per metre, so you can wire a caravan roof, 4WD canopy, boat or off-grid cabin without paying for a full roll you won't use.

Each cable has positive and negative cores in a single outer sheath. This keeps panel-to-regulator runs tidy, simplifies routing through roof entry glands and conduit, and reduces the number of separate cables to secure and protect.

Why Choose Purpose-Built PV Cable

Solar wiring sits outdoors, often on a hot roof, and carries continuous DC current. Both cables are made to recognised photovoltaic cable standards, PV1-F and IEC 62930, which are written for solar DC wiring. Standard automotive or household cable is not designed for this job.

• 4mm² Twin 1000V PV1-F: suits shorter runs and moderate current. It is a common choice for single-panel or small multi-panel caravan, RV and camper setups.
• 6mm² Twin 1500V IEC 62930: has a larger conductor to reduce voltage drop on longer runs or higher-current arrays. Its 1500V rating gives more headroom for series-wired panels.
• Twin-core construction: both conductors run in one sheath for a neater install with fewer cable ties and penetrations.
• Per-metre pricing: you buy only what the run requires, which helps with retrofits, extensions and adding a second panel.

Applications

These cables suit solar arrays on caravans, motorhomes, campervans, 4WD canopies and trailers. They also suit marine vessels, tiny homes, sheds and small off-grid or commercial installations where panels feed a solar charge controller or DC-DC charger. Because you order by the metre, they work well for replacing a damaged run, extending existing wiring, or connecting a new panel to an established system.

How to Choose Between 4mm² and 6mm² Solar Cable

Base your choice on three factors:

Current. Work out the maximum current your panel or array will carry.

Run length. Measure the full distance from the panels to the controller. Longer runs at low voltage lose more energy, so a larger conductor is often worthwhile.

Array voltage. Panels wired in series raise system voltage. Check that the cable's voltage rating sits comfortably above the array's open-circuit voltage.

As a general rule, 4mm² suits compact systems with short runs. Step up to 6mm² for longer runs, higher-wattage arrays, or when you want to keep voltage drop low.

To confirm the right size for your setup, use our DC cable sizing and voltage drop calculator. For larger projects, solar cable by the roll can suit bulk installs. You can also browse the full solar cable range for other options.

Order the Length You Need

Stop overbuying cable for a single solar run. Choose 4mm² or 6mm² twin PV cable, enter the metres you need, and build a tidy, correctly sized solar circuit for your caravan, boat or off-grid system.