Solar Cable

A solar cable is the interconnection cable used in photovoltaic power generation. Solar cables interconnect solar panels and other electrical components of a photovoltaic system.

Solar cable is an electron beam cross-linked cable rated at 120°C that can withstand harsh weather conditions and the mechanical shock of the equipment to which it belongs.
Solar technology will be one of the green energy technologies of the future, and solar photovoltaic (PV) is becoming more widely used internationally.
In addition to the rapid development of government-backed PV plants, ZMS Cables is expanding its line of PV cable systems with plans to put solar cables and assemblies into production and sell them worldwide.
ZMS is committed to producing high-quality 4mm and 6mm solar DC cables. You can always contact us for the latest solar panel cable prices and more discounts.

And as experts in solar cable production, we offer innovative solutions for customer projects that have both continuous operational performance and minimal maintenance and efficient initial setup.

A comprehensive portfolio of solar cables

Zms produces solar cables manufactured to a wide range of British and international standards.
These include solar cables to EN 50618, covering a range of typical applications for rooftop solar installations and solar farms.
Such as providing interconnections for photovoltaic power systems, including solar panel arrays.
This robust range of outdoor cables is designed to withstand harsh environmental conditions and degradation caused by UV exposure.
We also offer a variety of bare copper conductors, and low and medium-voltage cables to connect solar installations to substations and the grid.

Types of Solar Power Cable Products

Solar PV H1Z2Z2-K Tinned Copper Cable

The latest H1Z2Z2-K European standard solar cable for interconnection within photovoltaic systems, such as solar panel arrays. The cable is suitable for fixed installations inside or outside of a duct or system.
Our product is certified by TUV and it complies with IEC 62930 and EN 50618 standards.
The product is suitable for solar farms, rooftop solar installations, floating power plants, etc. It is a highly flexible cable, especially suitable for connection between photovoltaic solar panels.
This versatile solar panel extension cable is designed to meet the different needs of the solar industry.

Impact tested for direct burial in the ground, it is also used in scenarios where the emission of toxic gases in case of fire or smoke poses a potential risk to life and equipment, it is also suitable for wet locations and has a water resistance of AD8.

  • Rated Voltage: 1000V AC, or 1500V DC

  • Conductor Material: Tinned Copper

  • Number of Conductors: single-core/ dual-core

  • Cross Section: 1.5 mm2~95 mm2

  • Insulation: Low smoke halogen-free (LSHF), XLPO

  • Outer sheath:Low smoke halogen-free (LSHF), XLPO

  • The High Voltage Test: AC 6,5kV, or DC 15kV

  • Working Temperature: -40℃~90℃

  • Max. Conductor Temperature: 120℃

  • Standard: EN 50618/IEC 62930

  • Certification: International TUV certification

  • Sheath Colour: Black

        Other colors available on request

Structure of Solar DC Cable


Solar power lines are also known as photovoltaic cables, photovoltaic cables, etc. The structured shape is generally single-core circular or double-core parallel.

Main Structure

Conductor: Tinned copper wire soft conductor twisted together.

Insulation: Halogen-free low smoke flame retardant irradiated cross-linked polyolefin.
Sheath: Halogen-free, low smoke, flame retardant irradiated cross-linked polyolefin.

Product Features

ZMS photovoltaic cables solar products are TUV certified (TUV certificate R50087840)
– Resistant to ozone, UV, and water vapor
– Lead-free, halogen-free, flame retardant, very low smoke emission
– Oil resistant – chemically resistant
– Conductor temporary overload up to +400 °C
– Ambient temperature -40°C to +110°C (TUV limit +90°C)
– Excellent flexibility under low-temperature conditions
– Resistant to cuts, tears, and crack extensions
– Insulation and outer sheath can be peeled off in one go
– Service life of more than 20 years (up to +90°C)
– Compatibility with standard connectors and connection systems
– Anti-bacterial, anti-microbial

Professional Solar Cable Technical Support

The complete solar power cable solution that ZMS Cables can offer covers the entire project scope from cable selection to design, to same-day shipping or production within a short lead time, logistics, and testing, both off-site and on-site.
Note that if the products described on this page differ from the specifications of your solution, please contact us promptly. ZMS cable manufacturers can customize high-quality solar PV cables according to customer requirements.
About professional cable testing experiments, we can offer a wealth of technical expertise, including custom cable development as well as cable testing, and suspicious fault checking.

Solar Cable Accessories and Tools

To ensure the best performance of your solar system, ask about our solar wire accessories, solar adapter cable, solar panel wire connectors, and solar panel cable including our connectors and professional crimping tools, as well as professional solar panels for a fast and error-free installation.


Photovoltaic cable technical performance requirements

Insulation: resistance conductor resistance ρ≤4.95 Ω/km at 20 ℃. sheath surface resistance ρ≥ 109Ω.cm.

Pressure test water temperature: 20 ± 5 ℃, immersion length 10M, time 1H, AC frequency voltage 8000V, maintain 5min without breakdown.

Combustion test vertical combustion test: the distance between the upper fixed point and the beginning of carbonization ≥ 50 mm. Combustion downward extension of the distance to the upper fixed point ≤ 540 mm. Combustion gas corrosion test: PH value ≥ 4.3, conductivity ≤ 10μ S / mm.

Inner layer insulation: mechanical properties before the aging tensile test: tensile strength ≥ 5N/mm2, elongation at break ≥ 200%. After aging (135±2℃), tensile strength change ≤±30%, elongation at break change ≤±30%.
Air bomb aging tensile test: air pressure 5.5 bar (127 ℃) tensile strength change ≤ + 30%, elongation at break change ≤ + 30%.
Thermal elongation test: oven temperature 250 ± 3 ℃, mechanical pressure 20N/cm2 elongation under load ≤ 100%, elongation after unloading ≤ 25%.

Mechanical properties of the sheath before aging tensile: tensile strength ≥ 10.0N/mm2. Elongation at break ≥ 300%.
After aging (85 ± 2 ℃): elongation at break ≥ 250%.
Change in tensile strength ≤ ± -15%. Elongation at break change ≤ -25%.

Weather resistance test Low-temperature bending test of sheath: -40±2℃ in the freezer, 16 hours, no cracks can be seen by visual inspection after the test.
Inner layer insulation and sheath ozone resistance: ozone concentration 250-300pphm, 24h, no cracking in 180o bending part after visual inspection. Sheath weather resistance cycle: sprinkling 18min, xenon lamp drying 102min test temperature 45±5°C. Total test time of at least 500h immediately followed by 7.1 bending test at room temperature, no cracks.

No. 2 oil (ISO1817 ) test after oil immersion compressive strength retention ≥ 60%. Oil immersion after tensile elongation retention ≥ 70%. Diameter change after oil immersion ≤ 160.

Environmental adaptability of solar cables

For photovoltaic applications, materials used outdoors should be based on UV light, ozone, drastic temperature changes, and chemical attack.
The use of low-grade materials under such environmental stress will cause the cable sheath to become brittle and can even cause the cable insulation to decompose.
All of these conditions will directly increase the loss of the cable system, as well as the risk of a cable short circuit and, in the medium to long term, a higher likelihood of fire or personal injury.
Solar systems are often used in harsh environmental conditions, such as high temperatures and UV radiation.
Typically, the various materials available to us are PVC, rubber, TPE, and high-quality cross-linked materials. However, unfortunately, rubber cables rated at 90°C and PVC cables rated even at 70°C are often used outdoors, which significantly affects the lifetime of the system.
The advantage of solar cables is that they are rated for 120°C (20,000 hours of use). This rating is equivalent to 18 years of use at a continuous temperature of 90°C.
And when the temperature is below 90°C, the service life is even longer.
Typically, solar equipment is required to have a service life of 20 to 30 years or more.

Solar panel wire, in an outdoor environment, last 8 times longer than rubber cables and 32 times longer than PVC cables.

Selection of Photovoltaic Solar Cables

The cables used in the low-voltage DC transmission part of solar photovoltaic power generation systems have different requirements for the connection of different components due to different usage environments and technical requirements.
The overall factors to be considered are the insulation performance of the cable, heat, and flame resistance, aging performance, wire diameter specifications, etc.

Specific requirements are as follows

1. Solar modules and modules between the connection cable, generally use the connection cable attached to the module junction box directly connected, the length is not enough to use a special extension cable.
According to the size of the module power, this type of connection cable has a cross-sectional area of 2.5m ㎡, 4.0m ㎡, 6.0m ㎡ , and other three specifications.
This type of connecting cable has a double-layer insulation sheath, superior resistance to UV, water, ozone, acid, and salt erosion, superior all-weather capability, and wear resistance.
2. The connection cable between the battery and the inverter requires a UL-tested multi-strand flexible cable with as tight a connection as possible. Choosing a short and thick cable can reduce the loss of the system and improve efficiency and reliability.
3. The connection cable between the battery array and the controller or DC junction box also requires the use of UL-tested multi-stranded flexible wire with a cross-sectional area based on the maximum output current of the array.
These are the recommendations of the ZMS cable team personnel. If there is anything else you do not understand, you can always contact the ZMS Cable Team. We will be happy to serve you.


TYPE CrossSectionConductor StructureConductorDiameterOuterDiameterConductor ResistanceRated VoltageRated Current

mm²No.OD (mm)mmmmΩ/KmV AC/DCA


TYPE CrossSectionConductor StructureConductorDiameterOuterDiameterConductor ResistanceRated VoltageRated Current

mm²No.OD (mm)mmmmΩ/KmV AC/DCA

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ZMS Cable have a wide product scope, includes: Power cables up to 500kV, AAC, AAAC, ACSR conductors, ABC Cable,electric wires, instrument cable, telecommunications cable, Stay wires. With advanced manufacture technology, rich human resource and effective management system, we guarantee all products are manufactured strictly in accordance with GB, IEC, BS, NFC, ASTM, DIN standards,etc. Beyond quality control, ZMS have been trying its best to offer much higher standard of services rather than expected.

The Adjuster
All customised cables designed by our cable engineer will be subject to testing to relevant standards and appropriate performance criteria. Bespoke cable testing will be conducted under our CNAS accreditation where appropriate. Where required by industry or application, we can submit for relevant cable certification and cable approval processes. For more information or to discuss possible custom designed cable solutions, please complete an enquiry form, contact our technical experts on the Technical Hotline +86 (0)371 6782 9333, or

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