PV Wire / Photovoltaic Cable (UL 4703 Standard, 600V-2000V)
Farwalk’s PV Wires are the rugged DC backbone of North American and international solar infrastructure. Strictly manufactured to UL 4703 standards, these cables are engineered to endure 25+ years of direct sunlight and extreme environmental stress. With a dual-wall thermoset XLPO construction, they deliver safe, reliable power for utility-scale solar farms and commercial rooftops.
Manufactured in accordance with UL 4703 and ASTM standards. The core features fine-stranded tinned annealed copper, providing ultimate resistance to salt-spray and terminal oxidation. It is insulated with two layers of Cross-linked Polyolefin (XLPO), a thermoset material that will not melt under high-heat solar spikes. Rated for up to 2000V DC.
The primary choice for DC interconnections in solar photovoltaic systems, specifically linking PV modules (panels) to combiner boxes and inverters. UL 4703 PV Wire is required for any system following the National Electrical Code (NEC), offering the thermal and mechanical resilience necessary for exposed outdoor routing and direct burial applications.
• Voltage Rating: 600V, 1000V, 2000V (UL)
• Conductor: Tinned Annealed Copper (Class B/C)
• Insulation/Jacket: Dual-layer Thermoset XLPO
• Standard Compliance: UL 4703, NEC Article 690
• Temp. Rating: 90°C Wet/Dry, -40°C Cold Bend
• Flame Test: VW-1 / UL 1581
1. Conductor: Fine-stranded tinned annealed copper (Class B or Class C stranded).
2. Insulation: High-performance thermoset Cross-linked Polyolefin (XLPO).
3. Outer Jacket: UV-resistant, moisture-resistant, thermoset Cross-linked Polyolefin (XLPO).
4. Design: Dual-wall construction for enhanced mechanical protection against sharp racking edges and environmental aging.
• 25+ Year Service Life: Specifically engineered with premium XLPO compounds to withstand continuous UV radiation and extreme weather for the full economic life of the PV system.
• Thermal Stability: Rated for 90°C in both wet and dry locations and can withstand conductor temperatures up to 125°C under peak solar loading.
• Mechanical Protection: Dual-layer construction provides superior resistance to crushing, abrasion, and incidental contact with acidic soil.
• UL 4703 Mastery: Our PV wires are strictly manufactured to meet North American safety codes, ensuring immediate approval by electrical inspectors and utility companies.
• Corrosion Defiance: Tinned copper conductors provide the highest level of protection against terminal oxidation and salt-spray, essential for coastal solar installations.
• Installation Efficiency: Optimized for flexible pulling through conduits and tight-radius routing behind PV modules, significantly reducing labor time.
Comparison Logic
| Feature | Type PV Wire (Farwalk) | Type USE-2 Cable | Standard THHN Wire |
| UV Resistance | Extreme (25+ Years) | Moderate | Low (Prone to cracking) |
| Insulation Type | Thermoset XLPO (Dual Wall) | XLPO (Single Wall) | Thermoplastic PVC |
| Voltage Peak | Up to 2000V DC | Up to 600V DC | 600V Max |
| Direct Burial | Yes (if marked) | Yes | No |
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