Solar extension cable 20m 6mm² - red/black for reliable PV applications (set)
€69.02*
Prices excl. shipping costs
Description
Product information
The solar extension cable set (20 metres, 6mm²) is the high-performance solution for photovoltaic projects where maximum efficiency and minimum losses over long distances are paramount. If you need to bridge a distance of 20 metres between your solar modules and the inverter, this generous cross-section of 6mm² offers the necessary reserves to safely transmit the generated energy to its destination without any significant heat build-up.
The set contains two high-quality, double-insulated solar cables: a red cable for the positive pole (+) and a black cable for the negative pole (-). Both ends are professionally fitted with MC4-compatible plugs and sockets. The solid cross-section makes this set particularly future-proof and ideal for modern high-performance modules, which often deliver high currents and where standard cables already reach their limits at this distance.
Highlights at a glance
- Lowest line losses: The cross-section of 6mm² drastically reduces electrical resistance and ensures a much lower voltage drop than conventional 4mm² cables over 20 metres.
- Plug & Play installation: The cables are pre-assembled on both sides with MC4-compatible connectors, so no special crimping tool is required.
- Secure identification: The colour coding in red (+) and black (-) effectively prevents incorrect polarity and makes installation easier even with more complex systems.
- Weatherproof & durable: The special jacket made of cross-linked polyolefin is UV-resistant, ozone-resistant and withstands extreme temperatures from -40°C to +90°C.
- IP67 protection class: The connectors are absolutely dustproof when plugged in and protected against temporary submersion (rain/puddles).
- High-quality conductor: Tinned electrolytic copper ensures excellent corrosion resistance and permanently high conductivity, even in demanding environments.
Areas of application
This 20-metre extension is optimised for demanding long-distance connections:
- Large balcony power plants & garden systems
- Ideal for placing modules at the sunny end of a garden or on a carport and routing the electricity with minimal loss over 20 metres to the house.
- Roof systems & barns
- Bridging the distance from far-off module strings to the point of entry into the building or to the central inverter.
- Off-grid systems (12V / 24V / 48V)
- Particularly critical for battery systems: At 20 metres, the 6mm² cross-section ensures that the charging voltage arrives almost loss-free, noticeably increasing the efficiency of your storage unit.
Assembly & safety instructions
- Efficiency advantage over distance
- At 20 metres cable length, 6mm² offers a significant advantage over 4mm². The lower resistance provides a higher system voltage at the inverter and thus measurably more yield.
- Strain relief & fixation
- Fasten the long cable paths every 50-100 cm with UV-resistant cable ties to the mounting frame or in cable ducts to avoid mechanical strain on the connectors.
- Correct locking
- When connecting, make sure that the MC4 connectors audibly engage. Only then is the connection permanently watertight and safe against dangerous arcing.
Features
| Model | Solar extension cable set (20m / 6mm²) |
| Conductor cross-section | **6.0 mm²** |
| Cable length | **20.0 metres** (per colour) |
| Nominal voltage | Up to 1500 V DC |
| Connector type | **MC4 compatible** (IP67) |
| Conductor material | Copper, tinned (fine stranded) |
| Temperature range | -40°C to +120°C (on the conductor) |
| Standardisation | TÜV / EN 50618 (H1Z2Z2-K) |
| Special feature | Very low resistance & loss-optimised |
FAQs about the solar extension cable 20m 6mm²
Why should I choose 6mm² for 20m?
To minimise power losses. At a length of 20 metres (40m total distance), the resistance adds up. 6mm² cables have around 30% less resistance than 4mm² cables. This means less heat loss in the cable and more usable energy for your inverter.
Do the connectors fit modules from all common manufacturers?
Yes. The connectors used comply with the worldwide MC4 standard. They fit mechanically and electrically perfectly to connections on brands such as Trina, Jinko, JA Solar or Canadian Solar.
Can I shorten the cable if necessary?
Yes, with expertise. You can cut the cable. Please note, however, that you will need professional MC4 connectors and special crimping pliers for the new connection to ensure a permanently safe connection.Properties
| Cross-section of the conductor: | 6.00 mm² |
|---|---|
| Nominal voltage: | 0.6 / 1kV AC |
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