IEC Photovoltaic Cable Standards: Tinned Copper vs Aluminium & Large PV Inverter Wiring | HuaCable
Most PV / s ralos /olar DC cables u wosed on the module-to-inverter side follow IEC 62930 (internationally), EN 50618 / H1Z2Z2-K (Europe) or 2 PfG 1169 / PV1-F (TÜV), and they all use flexible tinned copper conductors. Aluminium is not part of the IEC 62930 DC PV cable scope — it appears on the AC / MV collection side of some utility-scale plants under different standards. For large solar PV inverters, the DC input side still uses the same certified tinned-copper PV DC cable; only the AC output / collector may step to other cable families.
About this guide. HuaCable manufactures PV / solar DC cables with tinned copper conductors (TÜV and TÜV + CE, depending on model). This article discusses aluminium conductors for comparison and completeness, but aluminium PV cables are outside HuaCable's product range — it does not claim we supply them. For our actual certified line, see the PV cable guides linked at the end.
What Are IEC Photovoltaic Cables?
"IEC photovoltaic cable" generally refers to the single-core, flexible DC cable that links PV modules to combiner boxes, inverters and the rest of the array on the DC side. These cables are built for a harsh life: continuous sun (UV), ozone, temperature swings, and 25-year outdoor service. They are double-insulated (insulation layer + outer sheath), typically black, and rated for DC voltages well above ordinary low-voltage building wire.
The most referenced international standard for this cable is IEC 62930. A fuller look at that standard is in our companion article, IEC 62930:2017 — An Overview of the Photovoltaic Cable Standard.
Key PV Cable & Inverter Standards at a Glance
Standard | What it covers | Conductor | Typical use |
|---|---|---|---|
IEC 62930:2017 | Single-core PV DC cable, crosslinked insulation & sheath | Flexible Class 5 copper (tinned) | International PV DC wiring |
EN 50618 (H1Z2Z2-K) | European PV DC cable | Flexible Class 5 copper (tinned) | EU market (TÜV + CE) |
2 PfG 1169 (PV1-F) | TÜV PV DC cable specification | Flexible Class 5 copper (tinned) | TÜV-recognized PV DC cable |
IEC 62852 | Connectors for PV systems (MC4-type) | — (connector, not cable) | Module / string connections |
IEC 60364-7-712 | Electrical installations — PV supply systems | — (installation rule) | System design & wiring rules |
IEC 61730 | PV module safety qualification | — (module context) | Flame / weather resistance context |
IEC 60228 | Insulated cable conductor classification | Defines Class 5 flexible | Conductor construction basis |
All three mainstream DC solar-cable specs — IEC 62930, EN 50618 and 2 PfG 1169 — are built on the same physical idea: a flexible tinned-copper conductor wrapped in crosslinked (XLPE / XLPO) double insulation, rated for DC service and outdoor exposure.
Conductor Material: Tinned Copper vs Aluminium
This is the part buyers ask about most, so it deserves a clear answer.
Tinned copper (the IEC 62930 norm)
IEC 62930:2017 specifies a copper conductor, flexible Class 5, normally tinned. Tinning adds a thin tin layer over the copper strands. Why it matters for solar:
Corrosion resistance. Outdoor PV cable lives in humidity, salt air (coastal), condensation and heat. Tin slows oxidation far better than bare copper.
Long service life. Arrays are warranted for 25+ years; the conductor must survive that without losing connectivity at terminations.
Termination reliability. Tinned strands crimp and connect more predictably in MC4 connectors and combiner boxes.
Aluminium (outside IEC 62930 DC PV cable)
Aluminium conductor PV cables are not covered by IEC 62930. In large utility-scale plants, aluminium sometimes appears on the AC collection or medium-voltage side (e.g. aluminium-core MV cables from the inverter/transformer to the grid), where different standards and economics apply. That is a separate cable family from the DC module-to-inverter solar cable.
⚠ Don't mix the two worlds. Searching "aluminium PV cable" can surface utility AC/MV cabling. The DC string cable that actually connects modules and the inverter DC input is copper (IEC 62930 / EN 50618 / PV1-F). If your project needs aluminium on the AC side, that is a different specification and outside the DC PV cable scope.
Aspect | Tinned copper (IEC 62930 DC PV cable) | Aluminium (AC / MV side, other standards) |
|---|---|---|
Covered by IEC 62930? | Yes | No |
Typical application | Module → combiner → inverter DC input | AC collector / MV to grid (utility scale) |
Flexibility | Class 5 flexible, easy to route | Often stiffer, different termination |
Outdoor DC solar use | Standard choice | Not for DC PV string cabling |
Large Solar PV Inverter Cable Standards
"Large" PV inverters — central inverters (hundreds of kW to multiple MW) and large string inverters — still obey the same DC cable rules on their input side. What changes with scale is the quantity and current rating of parallel DC strings, not the cable standard.
DC input side (module → inverter)
Cable type: PV DC cable — IEC 62930, EN 50618 (H1Z2Z2-K) or 2 PfG 1169 (PV1-F).
Conductor: flexible tinned copper, Class 5.
Construction: double insulation (insulation + sheath), XLPE / XLPO.
Rating: DC 1.5 kV (IEC 62930 / EN 50618) or 1.8 kV (PV1-F); service temp about −40 °C to +90 °C, short-circuit up to +120 °C.
Environment: UV-, ozone- and weather-resistant; flame-retardant per the relevant PV standard.
AC output / collector side
After the inverter, the AC output may run to a transformer or collection network. At utility scale this AC/MV part can use different cable types — including aluminium-core MV cable in some markets — governed by grid and installation standards rather than IEC 62930. This AC/MV family is outside HuaCable's DC PV cable range.
IEC 62930 Standard — Quick Explanation
IEC 62930:2017 is the international benchmark for single-core photovoltaic DC cables. In plain terms it defines a cable with:
a flexible copper conductor (Class 5, normally tinned);
crosslinked insulation and sheath (XLPE / XLPO), giving a double-insulated wall;
a DC voltage rating of 1.5 kV (U₀/U = 1.5/1.5 kV);
outdoor performance: UV, ozone and weather resistance, plus flame-retardant behavior;
a wide temperature range for fixed outdoor PV installation.
For the full scope, construction detail and how it compares with EN 50618 / PV1-F, read our dedicated guide: IEC 62930:2017 — An Overview of the Photovoltaic Cable Standard.
HuaCable PV / Solar DC Cable Offering
HuaCable supplies the certified tinned-copper DC solar cable family — the cables that actually run from modules to the inverter DC input:
Model | Standard basis | Certification | DC rating |
|---|---|---|---|
H1Z2Z2-K | EN 50618 | TÜV + CE | 1.5 kV |
PV1-F | 2 PfG 1169 | TÜV only | 1.8 kV |
IEC 62930 | IEC 62930:2017 | TÜV only | 1.5 kV |
Common cross-sections run 1.5–6 mm² (and matched MC4 connectors, CE). Aluminium PV cable is not part of this range.
FAQ
Are IEC 62930 photovoltaic cables aluminium or copper?
IEC 62930:2017 specifies copper conductors — flexible Class 5, typically tinned copper — for PV DC cables. Aluminium conductor photovoltaic cables are not covered by IEC 62930; aluminium normally appears on the AC / medium-voltage collection side of utility-scale plants under different standards, which is outside the DC PV cable scope.
Why are PV / solar DC cable conductors tinned copper?
Tinning (a thin tin layer over copper) protects the conductor from oxidation and corrosion in outdoor, humid, coastal and high-temperature environments. PV cables run exposed to sun, rain and thermal cycling for 25+ years, so tinned copper gives far longer service life than bare copper in those conditions.
What standards apply to PV / solar DC cables?
The principal DC solar-cable standards are IEC 62930 (international), EN 50618 / H1Z2Z2-K (Europe), and 2 PfG 1169 / PV1-F (TÜV). Connectors follow IEC 62852, and installations follow IEC 60364-7-712. Module safety context is covered by IEC 61730.
What cable connects a large solar PV inverter on the DC side?
On the DC input side, large inverters connect via PV DC cable (IEC 62930 / EN 50618 / PV1-F): tinned copper, double insulation (insulation + sheath), UV- and ozone-resistant, rated DC 1.5–1.8 kV, with a service temperature around -40 °C to +90 °C (up to +120 °C short-circuit).
Can aluminium be used for PV module string wiring?
The DC string cabling covered by IEC 62930 is copper. Aluminium may be used on the AC collector or MV side of some utility-scale projects under other standards, but that is a different application and a different cable family — not the module-to-inverter DC solar cable.
Does HuaCable supply aluminium PV cables?
HuaCable's PV / solar DC cable range (PV1-F, H1Z2Z2-K, IEC 62930) uses tinned copper conductors. Aluminium PV cables are outside our current product range; for DC module and inverter wiring we supply certified tinned-copper PV cable.
Engineer's Conclusion
If you remember one thing: the DC solar cable that connects PV modules and the inverter input is, by IEC 62930 / EN 50618 / PV1-F, a flexible tinned-copper, double-insulated PV DC cable. Aluminium belongs to a different conversation — the AC / MV collector side of utility plants — and is outside the IEC 62930 DC cable scope and outside HuaCable's range. For large inverters, scale up the number and current rating of the same certified DC cables; don't switch the standard. Pick the model by your market and certification need (H1Z2Z2-K for TÜV + CE, PV1-F or IEC 62930 for TÜV), and keep the conductor tinned copper.
Where to go next
IEC 62930 deep dive: IEC 62930:2017 — An Overview of the Photovoltaic Cable Standard.
H1Z2Z2-K (TÜV + CE, EN 50618): selection guide.
PV1-F (TÜV 2 PfG 1169): selection guide.
MC4 connector (CE): connector guide.
Request a quotation — tell us cross-section, length and certification (TÜV / TÜV + CE), and we'll route you to the right channel for your market.
Author: Engineer Chan · HuaCable technical team
10 years in wire & cable manufacturing; EN 50618 / TÜV PV cable experience.
Standard references (IEC 62930:2017, EN 50618, 2 PfG 1169, IEC 62852, IEC 60364-7-712) are for planning guidance; always confirm the applicable edition and local wiring rules for your project.
