6 AWG (13 mm²) 120A Ultra-Flexible Tinned Copper Silicone MPPT Charger Battery Cable

6 AWG (13 mm²) 120A Ultra-Flexible Tinned Copper Silicone MPPT Charger Battery Cable

The Greater Wire 6 AWG (13 mm²) Ultra-Flexible Inverter Battery Cable is engineered for high-current (Continuous current: 120A max) DC power applications where reliability, flexibility, and longevity are essential. Built using ultra-fine strand tinned copper and premium high-temperature silicone insulation, this cable is ideal for modern inverter, lithium battery, and solar power systems.

Designed to outperform standard PVC battery cable, Greater Wire silicone cable remains exceptionally flexible in tight spaces and extreme temperatures, making installation cleaner and more reliable in mobile and off-grid environments.

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Key Features

• 6 AWG (13 mm²) conductor for efficient high-current power delivery

• Ultra-flexible fine-strand tinned copper for easy routing and vibration resistance

• High-temperature silicone insulation for superior durability

• Excellent resistance to heat, oil, moisture, UV, and abrasion

• Reduced voltage drop for improved system efficiency

• Corrosion-resistant construction, ideal for marine and coastal use

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Ideal Applications

• Solar controller to battery connections

• LiFePO4 lithium battery systems

• Solar and off-grid power installations

• Campervans, caravans, and motorhomes

• Marine, automotive, and 4×4 power systems

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Specifications

• Brand: Greater Wire

• Conductor Material: Fine-strand tinned copper

• Cable Size: 6 AWG (13 mm²)

• Continuous current: up to 120A

• Insulation: Silicone rubber

• Flexibility: Ultra-flexible

• Voltage Rating: Suitable for 12V / 24V DC systems

• Temperature Resistance: High-temperature rated silicone insulation

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Why Choose Greater Wire?

Greater Wire cables are manufactured to meet the demands of modern power systems, delivering dependable performance in harsh environments. The combination of tinned copper conductors and silicone insulation ensures long service life, consistent conductivity, and easier installation—making it a trusted choice for professionals and serious DIY installers.

 

• Gauge / Size: 2 AWG / 35 mm² / 8.3mm total conductor diameter
• Conductor: Multi-stranded tinned copper (≈ 6,700 × 0.08 mm strands)
• Insulation: High-temperature, flexible silicone rubber
• Outer Insulation Diameter: Approx. 12.5 – 13 mm
• Voltage Rating: 600 V (AC or DC)
• Current Capacity: Up to 200 A per cable (can be doubled up for 400A)
• Temperature Range: −60 °C to +200 °C
• Conductor Resistance: ~0.71 Ω/km at 20 °C
• Colours: Black, Red

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Amp Rating & Inverter Sizing Guide

The Greater Wire 6 AWG (13 mm²) Ultra-Flexible Silicone Battery Cable is suitable for medium-to-high current DC applications, including MPPT and inverter-to-battery connections.

Typical current ratings (conservative):

• Continuous current: up to 120A

• Short-duration / surge: up to 150–160A (e.g. inverter startup loads)

Actual current capacity depends on cable length, installation method, ambient temperature, bundling, and ventilation. Always size cabling conservatively and protect with an appropriately rated fuse close to the battery.

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Recommended Cable & Fuse Sizing

A) Battery Side (most important for 40A controllers)

This is where you size for 40A continuous.

Cable sizing (controller → battery)

• Short run (≤ 1.5 m one-way): 8 AWG (8–10 mm²) is typically ideal

• Medium run (1.5–3 m one-way): 6 AWG (13 mm²) recommended to reduce voltage drop

• Long run (> 3 m one-way): consider 4 AWG (21 mm²) or relocate the controller closer to the battery

Fuse / breaker (battery positive)

• 50A fuse/breaker is the common choice for a 40A MPPT

• Place it close to the battery (within ~150–200 mm)

Why 50A? You want the fuse to protect the cable and allow normal operation (40A continuous + small transients) without nuisance blowing.

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B) Solar / PV Side (panels → controller)

Size to your panel string current, not 40A.

Fuse / breaker

• Use a PV-side fuse/breaker sized to your array current (often 15A–30A per string, depending on panels and how many strings are paralleled).

• If you have multiple strings in parallel, string fusing is often required (common practice is fusing each string).

Cable sizing

• For many small-to-medium arrays feeding a 40A MPPT, PV current is often 10–20A, so 10 AWG (6 mm²) or 8 AWG (8–10 mm²) is common depending on distance.

• Longer PV runs benefit from thicker cable to reduce voltage drop (especially if PV voltage is low).

B) Recommended Inverter Sizing (12V Systems)

For 1500W+ inverters, or cable runs longer than ~1.5 m, consider 2 AWG (35 mm²) to reduce voltage drop and heat buildup.

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Fuse Recommendation

• Fuse size: 125A–150A (depending on inverter and cable length)

• Install fuse within 150–200 mm of the battery positive terminal

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24V Systems

At 24V, current is approximately half that of a 12V system, allowing higher inverter wattages to be supported with the same cable size.