Solar extension cable 35m 6mm² - red/black for reliable PV applications (set)

The solar extension cable set (35 metres, 6mm²) is the specialised solution for photovoltaic projects with very long distances. If your solar modules need to be positioned at the sunniest place on your property – for example, at the end of a large garden or on a remote barn – and the inverter is centrally located in the building, this generous 6mm² cross-section provides the necessary capacity to effectively minimise power losses over the full 35-metre span.

The set includes two high-quality, double-insulated solar cables: one red cable for the positive pole (+) and one black cable for the negative pole (–). Both ends come professionally pre-assembled with MC4-compatible connectors and sockets. Thanks to the substantial cross-section, this set is particularly future-proof and ideal for modern high-performance modules, where standard cables (4mm²) would already show significant efficiency losses over this distance.

Highlights at a Glance

• Optimised for Long Distances: The 6mm² cross-section dramatically reduces electrical resistance, which is crucial for high energy yield over 35 metres (70m total route).
• Plug & Play Installation: The cables are factory-fitted with MC4-compatible connectors on both ends, so no specialised crimping tools are required.
• Safe Identification: Clear colour coding in red (+) and black (–) ensures dangerous polarity confusion is effectively prevented on this long cable run.
• Weatherproof & Durable: The special cross-linked polyolefin sheath is UV-resistant, ozone-proof, and withstands extreme temperatures from –40°C to +90°C.
• IP67 Protection: When mated, the connector assemblies are absolutely dust-tight and protected against temporary immersion (e.g., during heavy rain).
• High-Quality Conductor: Tinned electrolytic copper ensures maximum corrosion resistance and consistently excellent conductivity even in adverse conditions.

Areas of Application

This 35-metre extension is designed for demanding long-distance connections:

• Ground-mounted systems
  • Ideal for installing modules far away in the garden or on a meadow, where there is no shading from buildings.
• Outbuildings & Agriculture
  • Connecting distant garages, carports, or stables to the main building.
• Off-grid systems (24V / 48V)
  • Especially for battery systems, the 6mm² cross-section over 35 metres is important to keep the charging voltage stable and losses low.

Assembly & Safety Instructions

• Efficiency Over Distance
  • For a cable length of 35 metres, 6mm² offers a significant advantage over 4mm². Lower resistance ensures higher system voltage at the inverter and thus measurably better yield over the years.
• Underground Installation Protection
  • Although the cable is weatherproof, if running it underground it must always be routed in suitable protective conduit for protection against mechanical impacts and rodents.
• Correct Latching
  • When connecting, ensure the MC4 connectors audibly latch. This is the only way to ensure a permanently watertight and safe connection against dangerous arcing.

Features

FAQs about the Solar Extension Cable 35m 6mm²

Why is 6mm² better than 4mm² at 35 metres?

Because of the lower voltage drop. Over a total length of 70 metres (there and back) the resistance sums up. A 6mm² cable reduces this resistance by about a third compared to a 4mm² cable, which can mean several percent higher yield for typical balcony power stations or module strings.

Will the connectors fit my inverter from Hoymiles, Deye or Growatt?

Yes. The connectors comply with the global MC4 standard and will fit mechanically and electrically with almost all common solar modules and inverters.

Can I shorten the cable if 35m is too long?