Our TUV approved 10 mm² twin core solar cable is rated at 1800V DC — exceeding the standard 1500V DC rating to provide additional safety margin for high-voltage string systems, long-string architecture designs, and future-proofing against the emerging trend toward higher DC bus voltages in utility-scale solar installations. The 10 mm² conductor cross-section delivers approximately 63A free-air ampacity, making this cable suitable for combining two to three parallel string outputs in a single twin-core cable run from combiner box to inverter.
The strong flexibility designation refers to the extra-fine-wire Class 6 copper conductor construction — providing superior bendability compared to standard Class 5 fine-wire conductors at the same cross-section. This is particularly beneficial for 10 mm² cables that would otherwise be stiff and difficult to route through solar racking systems and conduit bends. TUV Rheinland approved to EN 50618; XLPO insulation and sheath; ambient temperature ‑40°C to +90°C.
| Parameter | Value |
|---|---|
| Configuration | 2×10 mm² |
| Conductor | Class 6 extra-fine-wire tinned copper |
| Core Insulation | XLPO (H1Z2Z2-K) |
| Outer Sheath | XLPO |
| Rated Voltage DC | 1800V DC |
| Conductor Temp. | 90°C continuous / 120°C peak |
| Ambient Temp. | ‑40°C to +90°C |
| Approval | TUV Rheinland, EN 50618 |
IEC 60364-7-712 requires DC cable insulation rated at a minimum 1.2 times the maximum open-circuit voltage. For 1500V DC string systems with Voc of 1500V at STC, the minimum cable rating is 1800V DC — making this cable the exact specification for strict IEC compliance. Using 1500V DC rated cable in a 1500V DC system provides no voltage headroom above the maximum system voltage, which may not satisfy some AHJ interpretations of the 1.2x requirement.
