Professional cable manufacturer
EN 50618 material & test system · EN/IEC 60228 Class 5 · 1500V DC
H1Z2Z2-K 2×4mm² Twin Core Solar Cable
Flat twin-core PV cable with two tinned-copper Class 5 conductors in one sheath, insulated with electron-beam cross-linked XLPO — for module jumpers, string runs and pre-terminated harnesses where both polarities are pulled in a single pass.
0.9/1.8 kV
Rated DC Voltage
Class 5
Tinned Copper
−40 … +90°C
Ambient Range
2 × 4mm²
Twin Conductors
↓ Download Datasheet (PDF)
EN 50618 material system
25-year design life
Sample orders available
OEM colours & packing
1500V DC TWIN CORE
EN 50618:2014Material & test basis
IEC 62930Single-core scope
TÜV 2PfG 1169PV1-F requirements
EN / IEC 60228Class 5 conductor
−40°C … +90°CAmbient range
Key Specifications
The essentials, at a glance
Everything a solar engineer checks first — before diving into the full datasheet below.
1500V DC
Rated voltage (1.8 kV max.)
0.6/1.0 kV
Rated AC voltage
Class 5
Flexible tinned Cu
XLPO
E-beam insulation
LSZH
Halogen-free sheath
2 cores
Flat, polarity marked
Product Overview
Two cores, one pull — the flat twin-core construction
The H1Z2Z2-K 2×4mm² is a flat twin-core photovoltaic cable carrying two 4 mm² Class 5 tinned-copper conductors side by side in one reinforced sheath, built on the same XLPO material system as our single-core H1Z2Z2-K to EN 50618:2014 and IEC 62930. It is used where the positive and negative legs of a string are wanted in the same cable — module-to-module jumpers, combiner-box tails and pre-terminated harnesses.
Each core is a Class 5 flexible stranded tinned copper conductor per EN/IEC 60228 with a maximum conductor diameter of 2.4 mm and a maximum DC resistance of 5.09 Ω/km at 20°C — the standard limits that also apply to a single-core 4 mm² H1Z2Z2-K. Tinning keeps the strand surface stable in humid, coastal and polluted conditions, and the fine stranding gives a reliable crimp.
Insulation and sheath are both electron-beam cross-linked XLPO, halogen-free and low smoke. The cross-linked structure is what allows a 90°C continuous conductor temperature (120°C for up to 20 000 h), resists UV, ozone and hydrolysis, and supports a 25-year minimum design life on the EN 50618 basis. Because the two cores are moulded into one flat profile, the assembly holds its polarity layout along the whole run and needs only one cable pull instead of two.
Rated 0.9/1.8 kV DC maximum permissible operating voltage and 0.6/1.0 kV AC (0.7/1.2 kV maximum), the cable is intended for 1500V DC string architectures. Those are the values published for the multi-core PV1-F twin family, because the EN 50618 and IEC 62930 tables apply to single-core constructions. Because the two cores sit in contact inside one sheath, the assembly is rated on the two loaded cables touching basis: 44 A per core at 60°C ambient, taken from the EN 50618 Table A3 values for a 4 mm² conductor — the same figure Prysmian publishes for its own twin-core 2 × 4 mm² PV cable. Confirm the figure for your installation method with our engineers, since the twin-core profile itself is not tabulated in the standard.
More about the manufacturer: About SORIVO →
Key Features
Eight features that matter on a PV site
Same XLPO system as H1Z2Z2-K
Insulation and sheath are the electron-beam cross-linked XLPO compound used on our single-core H1Z2Z2-K cable to EN 50618:2014 / IEC 62930. EN 50618’s own scope clause covers single-core power cables, so the designation carries the conductor, compound and test requirements rather than a tabulated twin-core construction — the assembly data is confirmed with the order.
Two Class 5 Tinned Copper Cores
Two 4 mm² Class 5 flexible tinned-copper conductors per EN/IEC 60228, each with a 2.4 mm maximum conductor diameter and 5.09 Ω/km maximum DC resistance at 20°C.
Electron-Beam XLPO
Insulation and sheath are cross-linked by electron beam, giving a thermally and mechanically stable compound rather than a thermoplastic jacket.
0.6/1.0 kV AC · 1.8 kV DC
0.6/1.0 kV AC and 0.9/1.8 kV DC maximum permissible operating voltage — matched to modern 1500V DC string architectures.
Halogen-Free & Low Smoke
EN/IEC 60754-1 and 60754-2 for halogen acid gas, EN/IEC 61034-1/-2 for smoke density with light transmittance above 70% — relevant for rooftops and enclosed spaces.
90°C Continuous / 120°C Peak
90°C continuous conductor temperature for the full design life, 120°C for up to 20 000 h, and 250°C for a maximum of 5 s under short circuit.
UV, Ozone & Weather
Weathering resistance per EN 50618 Annex E, ozone resistance per EN 50396, and AD7 immersion water resistance — built for permanent outdoor exposure.
Flat Twin-Core Profile
Both cores in one flat sheath, polarity held along the run — one pull, one clip line, and no risk of crossing the positive and negative legs during installation. Published overall dimensions for the 2 × 4 mm² assembly are 6.1 × 12.3 mm.
Applications
Where this cable goes on a PV project
Wherever the positive and negative legs should travel together — from a module jumper to a long array feeder.
01
Utility-Scale Solar Farms
String and array DC cabling between module rows, combiner boxes and central inverters.
02
Commercial & Industrial Roofs
Module-to-module and string runs on large rooftops, where tight bends and long service life both matter.
03
Residential Rooftop PV
Panel-to-inverter DC wiring in home systems, including hybrid and retrofit installations.
04
DC Combiner Boxes
String inputs and DC distribution inside combiner boxes, where bend radius and sheath toughness matter.
05
Twin-Core Harnesses
Pre-terminated harnesses and combiner-box tails where both polarities are crimped and pulled as one assembly.
06
BIPV & Façades
Building-integrated PV, where halogen-free, low-smoke performance is part of the specification.
07
Floating & Agri-PV
Floating plants and agricultural or fishery PV, where UV, hydrolysis and humidity resistance are decisive.
08
Off-Grid & Hybrid
Remote power, solar-plus-storage and hybrid systems where a single polarity-marked run is easier to route and inspect.
Technical Specifications
Full specification sheet
The complete parameter set — the same data our engineers quote from.
Table 1 Twin-core assembly — dimensions, resistance and current rating
| Cross-section per core, mm² | Conductor dia. max. per core, mm | Overall dimensions flat, mm | Max. DC resistance per core at 20°C, Ω/km | Current rating assembly, A at 60°C |
|---|---|---|---|---|
| 2 × 4 | 2.4 | 6.1 × 12.3 | ≤ 5.09 | 44 |
Conductor diameter and maximum DC resistance are the EN 50618 / IEC 60228 Class 5 tinned-copper values for a 4 mm² conductor. The overall flat dimensions (6.1 × 12.3 mm) are SORIVO’s published figures for this finished construction, and the 44 A current rating is taken on the EN 50618 Table A3 two loaded cables touching basis for a 4 mm² conductor at 60°C ambient — the same figure Prysmian publishes for its twin-core 2 × 4 mm² PV cable. EN 50618 applies to single-core power cables only, so no tabulated value exists for the twin pair itself; confirm the assembly rating on the order confirmation. For ambient temperatures above 60°C apply the EN 50618 Table A4 factors (70°C × 0.92, 80°C × 0.84, 90°C × 0.75), and for grouped or touching cables refer to HD 60364-5-52. Twin-core sizes other than 2 × 4 mm² are available on request with their own dimensions.
Table 2 Construction and performance parameters
| General Information | |
| Product Name | H1Z2Z2-K 2 × 4 mm² Twin Core Solar PV Cable (flat, two cores) |
| Primary Standard | Manufactured to the EN 50618:2014 material, conductor and test requirements. EN 50618's scope clause covers single-core power cables, so this is a material and test basis for the twin-core construction — not a tabulated twin-core cable standard. The AC and DC voltage ratings stated on this page are the published values for the multi-core PV1-F twin family, since the EN 50618 table applies to single-core constructions. |
| Further Standards | EN / IEC 60228 Class 5 conductor. IEC 62930 is likewise a single-core cable specification. TÜV 2PfG 2642 is the TÜV specification covering multi-core photovoltaic cable, and TÜV 2PfG 1169 (PV1-F) is the single-core TÜV specification — the applicable certificate scope for this construction is confirmed with the order. |
| Rated Voltage AC | U0/U 0.6/1.0 kV AC, maximum permissible operating voltage 0.7/1.2 kV |
| Rated Voltage DC | U0/U 0.9/1.8 kV DC maximum permissible operating voltage — intended for 1500V DC strings |
| Test Voltage | 6.5 kV AC or 15 kV DC (alternative tests), 5 minutes |
| Cable Structure | Flat twin core, 2 × 4 mm² in one sheath; other twin-core sizes available on request |
| Core Identification | One black and one red core (standard) — polarity held along the whole run; custom colours on request |
| Conductor | |
| Conductor Material | Electrolytic annealed tinned copper — corrosion resistant strand surface |
| Conductor Type | Class 5 flexible stranded conductor, per EN / IEC 60228 |
| Max. DC Resistance | ≤ 5.09 Ω/km per core at 20°C (EN/IEC 60228 Class 5 tinned copper, 4 mm²) |
| Conductor Diameter | 2.4 mm maximum per core (4 mm² Class 5) |
| Insulation & Sheath | |
| Insulation Material | XLPO (cross-linked polyolefin), electron-beam cross-linked, halogen-free |
| Sheath / Jacket | XLPO (cross-linked polyolefin), LSZH, UV and ozone resistant |
| Overall Dimensions | 6.1 × 12.3 mm flat for the 2 × 4 mm² assembly (SORIVO published value, subject to manufacturing tolerance) |
| Halogen-Free | EN / IEC 60754-1; corrosive gases per EN / IEC 60754-2 |
| Smoke Density | EN / IEC 61034-1 and EN / IEC 61034-2 — light transmittance > 70% |
| Sheath Colours | Black (standard) / Red; other colours on request |
| Sheath Marking | SORIVO 2 × 4 mm² 0.6/1.0 kV AC 0.9/1.8 kV DC <year> — or per customer requirement. Cable standard designations are not printed on this construction, because EN 50618 and IEC 62930 cover single-core cables only; the exact sheath print is agreed on the order. |
| Electrical Ratings | |
| Current Carrying Capacity | 44 A per core for the 2 × 4 mm² assembly at 60°C ambient, taken on the EN 50618 Table A3 two loaded cables touching basis because the two cores run in contact inside one sheath. The other Table A3 columns for a 4 mm² conductor — 55 A in free air and 52 A on a surface — apply to a single-core cable and are not applicable to this construction. Prysmian publishes the same 44 A for its twin-core 2 × 4 mm² PV cable. The rating for your installation method is confirmed with the order. |
| Ambient Derating | Per EN 50618 Table A4: 70°C × 0.92, 80°C × 0.84, 90°C × 0.75 |
| Insulation Resistance | ≥ 800 MΩ·km at 20°C — SORIVO in-house routine test value |
| Voltage Drop | ≈ 10.18 V/A/km for the complete circuit loop at 20°C conductor temperature — both cores of the pair, calculated from the 5.09 Ω/km per-core maximum |
| Temperature & Environmental | |
| Ambient Temperature | −40°C to +90°C, fixed installation; −25°C to +60°C during handling and installation |
| Max. Conductor Temperature | +90°C continuous (design life on the EN 50618 basis); +120°C for up to 20 000 h |
| Max. Short-Circuit Temperature | +250°C, maximum 5 seconds |
| Cold Performance | Cold bending, elongation and impact at −40°C per EN 60811-504 / -505 / -506 |
| UV Resistance | EN 50618 Annex E (720 h / 360 cycles, EN 50289-4-17 method A) |
| Ozone Resistance | Per EN 50396, test type B |
| Water Resistance | AD7 immersion per EN 50618; AD8 submersion class agreed per order and supported by the test record for the construction supplied |
| Flame Performance | EN / IEC 60332-1-2, single cable vertical flame propagation |
| Minimum Bending Radius | 3 × overall diameter for cables up to 12 mm OD; 4 × overall diameter above 12 mm OD, per EN 50565-1 (per-size values in Table 1) |
| Design Life | Minimum 25 years on the EN 50618 design-life basis; typically 30 years at 90°C conductor temperature on the Arrhenius basis |
| Reaction to Fire (CPR) | Classified under EN 50575 — the declared class for the selected construction is stated on the Declaration of Performance |
| Packaging & Logistics | |
| Packaging | Wooden drum / coil / reel / custom packaging per request |
| Standard Length | 100 m / 200 m / 500 m per roll, customizable |
| MOQ | 500 meters for this size; the MOQ is set per cross-section and construction, so it differs across the size range — sample orders are negotiable in every case |
| Lead Time | 7–15 working days; stocked sizes may be available in 3–5 days |
Final cable selection should be based on string current, system voltage, run length, short-circuit conditions, installation method and applicable local requirements. Our engineers confirm the exact construction and certification scope with your project data.
Certificates & Standards
Verify before you buy — we make it easy
EN 50618:2014 — Material & Test Basis
The European standard for cables in photovoltaic systems and its IEC equivalent — the design basis of the XLPO compound and the 4 mm² Class 5 conductor used here. The standard’s scope clause covers single-core power cables for the DC side of PV systems, so this cable is supplied on the same conductor, compound and test requirements, with the twin-core construction data confirmed on the order.
Request certificate copy →TÜV 2PfG 1169 / 2PfG 2642
TÜV 2PfG 1169 (PV1-F) is the single-core photovoltaic cable specification; TÜV 2PfG 2642 is the specification covering multi-core PV cable. Ask us for the certificate scope that applies to your construction — conductor and test data is verified for every production batch.
Request test report →Halogen-Free, Smoke & Flame
EN/IEC 60754-1 and 60754-2, EN/IEC 61034-1/-2 and EN/IEC 60332-1-2 — the fire performance set required for rooftops and enclosed installations.
Request test report →
Transparency note: certification status and exact scope should always be confirmed against the certificate for the selected cable construction. We provide the certificate and test reports with every quotation — no blank promises.
Quality & Factory
Made in a real cable factory, tested before it ships
Every drum of solar cable is produced under controlled processes and released against the applicable EN 50618 material and test requirements.
- 1Incoming material control — tinned copper wire and XLPO compounds are checked before production starts.
- 2In-line process monitoring — conductor diameter, insulation eccentricity and sheath thickness are tracked during extrusion.
- 3Routine electrical tests — on-line spark test plus finished-cable voltage and insulation-resistance tests per the applicable requirements.
- 4Batch documentation — conductor resistance, dimensions and test records are retained for every production batch.
19+
countries served
60+
solar & storage projects
100%
routine test before shipment
How to Order
From inquiry to loaded drum in 5 steps
Send Inquiry
Tell us cross-section, colour, quantity and destination market.
Confirm Construction
We confirm construction, certification scope and quotation within one working day.
Sample Evaluation
Sample for qualification — stocked sizes within a few working days.
Bulk Production
7–15 working days lead time with batch test documentation.
Delivery & Support
Wooden drum packing, shipping documents and after-sales support.
FAQ
Questions buyers ask before ordering
A twin-core cable carries the positive and negative legs of a string as two insulated conductors inside one flat sheath; a single-core cable is one conductor per cable, so a string run needs two of them. Twin core means one pull instead of two, the polarity is fixed by the flat profile, and there is one clip line instead of two. The trade-off is that a twin-core assembly is less flexible in routing and is not what standard MC4 terminations are built for, so single core remains the mainstream choice for long string runs. Each core of this cable is a 4 mm² Class 5 tinned-copper conductor to EN/IEC 60228 — the same conductor as our single-core H1Z2Z2-K.
Yes. The construction is rated U0/U 0.9/1.8 kV DC maximum permissible operating voltage, and 0.6/1.0 kV AC with 0.7/1.2 kV maximum. These are the values published for the multi-core PV1-F twin family, because the EN 50618 tables apply to single-core cable only. Each core carries its own insulation, so the pair is rated as two 0.9/1.8 kV DC conductors, and the assembly current rating is taken on the EN 50618 Table A3 two-loaded-cables-touching basis because the cores run in contact inside one sheath. Note that EN 50618 and IEC 62930 are single-core cable specifications — this construction is built to their material and test requirements, with the assembly data confirmed on the order. Final selection, including any derating for ambient temperature, remains the responsibility of the system designer.
A flat profile keeps the two cores parallel at a constant spacing and makes it obvious which core is positive, so the polarity cannot be crossed during installation. It also needs only one cable pull and one row of clips, which matters on long rooftop runs and inside cable trays. The published overall dimensions of the 2 × 4 mm² assembly are 6.1 × 12.3 mm. Tell us the tray or conduit width you have and we will confirm whether the flat profile fits.
+90°C continuously, which is the temperature on which the EN 50618 design life is based. Up to +120°C is permitted for a total of 20 000 hours of operation, and +250°C is permitted for a maximum of 5 seconds under short-circuit conditions. The ambient range for fixed installation is −40°C to +90°C; during handling and installation the cable should be kept between −25°C and +60°C.
Outdoors, yes — the XLPO insulation and sheath are UV resistant per EN 50618 Annex E (720 h / 360 cycles, EN 50289-4-17 method A), ozone resistant per EN 50396 test type B, and the construction carries an AD7 immersion water rating. For direct burial the higher AD8 water-immersion class is required — AD8 comes from the installation / IP side rather than from EN 50618, so it is agreed per order and supported by the test record for the construction supplied. Because a flat twin-core cable beds differently from a round one, direct burial should also be checked against the installation method and any mechanical protection your local regulations require.
Each core of this cable is a 4 mm² Class 5 conductor with a 2.4 mm maximum conductor diameter, which is inside the wire range our MC4-compatible connectors are rated for (4 mm² and 6 mm², AWG 10–12). You will need a separate connector on each core — a twin-core cable is not crimped as a pair — and on the flat profile you may also want a Y-branch or a breakout sleeve to split the two cores cleanly. We supply MC4-compatible connectors and pre-terminated harnesses and can deliver factory-terminated twin-core harnesses to your lengths.
Yes to both. Certificate and test documentation for the XLPO compound and the Class 5 conductor is provided with the quotation and with the shipment, and the exact scope is confirmed against the certificate for the selected construction before the order is placed. EN 50618 applies to single-core power cables, so for a twin-core assembly we state plainly which values come from the standard and which are our own published figures for the finished cable — you will see both on the order confirmation. Sample orders are available for qualification; lead time depends on the size, colours and current stock. Request either through the form below.
The 2 × 4 mm² flat assembly is the size this page covers. Other twin-core sizes are available on request — tell us the per-core cross-section you need, the overall width you can accommodate and the current you expect, and we will confirm the dimensions and the assembly rating before quoting. Where a project only needs standard string wiring, our single-core H1Z2Z2-K 4mm² solar cable carries the full EN 50618 tabulated data.
Need a twin-core sample for your project?
Tell us the twin-core size and quantity — we reply within one working day.
Get a Free Quote
Send your twin-core cable requirement
The more detail you give, the faster and more accurate our quotation. Our engineers reply within one working day.
- Twin-core size (2 × 4mm² standard) and quantity in meters
- Jacket colour: black or red
- Installation: tray, conduit or free air — and the width you can accommodate
- Destination market (for certification scope)
- Sample request, if needed
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