Solar Extension Cable PV1-F 2.5mm² | 1000V DC Photovoltaic Wire for Inverter

What this cable does

A 2.5mm² PV1-F extension cable carries DC current between solar panels, combiner boxes, and inverters. The combination of tinned copper (49 strands) plus XLPO insulation delivers low contact resistance, UV stability, and deep cold performance.

The cable fits scenarios where high current is not the bottleneck: low-power modules, short-string runs, or compact rooftop layouts. In moderate-temperature conditions, a 300W module (~8.33A) allows 3 to 4 panels in series without reaching 41A load limits

Technical specs installers check

• 1000V DC system compatibility – tested to 1.8kV DC. Fits standard residential or small commercial string inverters (1000V DC bus).

• 41A current capacity – under 60°C ambient, single core, free-air mounting. Real-world values require temperature derating: 70°C → 37.3A, 80°C → 33.6A, 90°C → 29.1A.

• Tinned copper strands – each strand has a tin coating that protects against galvanic corrosion. Wind, salt fog, and thermal cycles will not attack the conductor at the point where insulation ends.

• Flexible construction (Class 5) – 49 fine strands of 0.25mm diameter each. The cable bends around corners without cracking.

• Outer diameter 5.4mm – fits standard MC4 crimping dies for 2.5–6mm² contacts.

Typical applications

• Interconnecting photovoltaic modules in series (low to moderate power arrays)

• Extending DC strings to the combiner box or inverter input

• Short-distance inverter tails (≤50 meters)

• Off‑grid battery charging circuits where current ≤40A

• Portable solar generator builds

FAQ

Q1: Can this 2.5mm² cable handle 1000V DC safely?
Yes. PV1-F 2.5mm² is rated DC 1.8kV (core to core). 1000V DC is within safe operating range for residential and small commercial inverters.

Q2: What is the maximum current for continuous use?
41A at 60°C ambient (single core, free air). At 90°C conductor temp, 25A. Derate for higher ambient or bundled runs.

Q3: Can I use this cable with MC4 connectors?
Yes. Standard MC4 contacts accept 2.5–6mm². Use a crimping tool with 2.5mm² die. The outer diameter (5.4mm) fits most MC4 boots.

Q4: What’s the voltage drop per 100 meters?
Conductor resistance ≤7.98 Ω/km. For 30A load, 100m round trip loses ~4.8V. Acceptable for short runs. For >50m, consider 4mm².

Q5: Is this cable suitable for direct burial?
Yes, if IP68 rated and protected from rocks/sharp objects. Use conduit in rocky or high-traffic areas.

Q6: What certifications does this cable carry?
TUV EN50618, IEC 62930 (optional), CE, RoHS, REACH. Halogen-free per IEC 60754-1.

Q7: Black or red color – which do I need?
Both. Black for negative (−), red for positive (+). Order matched pairs for polarity identification.

Q8: Can I cut it to custom lengths without special tools?
Yes. Cut with standard cable shears. Strip insulation with a 5–6mm stripping tool. Crimp MC4 contacts separately.

Q9: How flexible is this cable at low temperatures?
Remains flexible down to -40°C. Class 5 stranded copper (49×0.25mm) prevents cracking in cold climates.