Our 4 mm² single core solar cable is engineered specifically for photovoltaic DC wiring in rooftop, ground-mount, and utility-scale solar installations. Constructed with a Class 5 tinned copper conductor, cross-linked polyolefin (XLPO) insulation, and an XLPO outer sheath, this cable carries TUV approval to EN 50618 (H1Z2Z2-K designation) and meets IEC 62930 requirements — making it suitable for global solar projects in Europe, the Middle East, and Asia-Pacific markets.
The tinned copper conductor provides superior corrosion resistance compared to bare copper — critical in humid, coastal, and salt-air environments where oxidation at conductor-connector interfaces can increase contact resistance and reduce system efficiency. The XLPO insulation withstands the continuous 90°C operating temperature and the 120°C peak rating required for junction boxes in full summer sun conditions. Rated 1500V DC; UV, ozone, and weather resistant; temperature range ‑40°C to +90°C ambient.
| Parameter | Value |
|---|---|
| Cross-section | 4 mm² |
| Conductor | Class 5 tinned annealed copper |
| Insulation & Sheath | XLPO (cross-linked polyolefin) |
| Rated Voltage DC | 1500V DC |
| Conductor Temp. | 90°C continuous / 120°C peak |
| Ambient Temp. | ‑40°C to +90°C |
| Standard | EN 50618 / H1Z2Z2-K, IEC 62930 |
| Approval | TUV Rheinland |
4 mm² is the most common single-string cable cross-section for residential (up to 10 kWp) and commercial rooftop systems with string currents up to 15–18A. Its combination of adequate ampacity, flexibility for panel-frame routing, and cost-efficiency makes it the first choice for most single-family and small commercial PV installations.
Modern string inverters and utility-scale systems operate at 1500V DC — specifying 1500V DC rated cable (this product) ensures full compliance and safety margins. Do not substitute 1000V DC rated cable in 1500V DC systems. Confirm your inverter MPPT input voltage range before cable selection.
