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Pair of red and black 10AWG solar cables with waterproof connectors, 40 feet

BFKK

BFKK 40 Feet 10AWG Solar Extension Cable Kit internal power cable

SKU CH-TDZ4-2F25W

A 40-foot pair of 10AWG solar extension cables with IP68 waterproof connectors rated for 57A and 6500V test voltage

Cable Length 40 Feet

  • 40-foot reach extends panel-to-controller distance
  • 10 AWG tin-plated copper cuts resistive loss
  • IP68 waterproof connectors survive decades outdoors
  • TÜV and CE certified for 57 A continuous
  • Flame-retardant PPO jacket handles -40 °C to 90 °C

Solar extension kit purpose

This 40‑foot 10AWG cable kit connects solar panels to charge controllers in RV and photovoltaic systems. It includes one red and one black lead, each factory‑fitted with male and female waterproof connectors for quick daisy‑chaining. The pair suits installers who need a ready‑made, weather‑proof link between array and controller.

10AWG 57 A current rating

Conductors use tin‑plated copper with a 6 mm² cross‑section and a 20 °C resistance of 5.09 Ω/km, rated for 57 A continuous. TÜV and CE marks confirm compliance with photovoltaic cable standards. The specification is the decisive figure for matching panel output and controller input without excess voltage drop.

IP68 ‑40 °C to 90 °C operation

The PPO flame‑retardant jacket and IP68 sealing allow direct burial and decades of outdoor exposure from ‑40 °C up to 90 °C (194 °F). Test voltage reaches 6500 V, and UV‑resistant insulation maintains integrity under constant sunlight. Normal use stays cool and silent because the cable carries current without active cooling.

How it compares

Measured against everything we stock in Internal PSU & Riser Cables, at today’s prices. Recalculated every night.

Price $70.99
Pricier than about 89% of the 7,839 comparable items (median $14.99).

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Specifications

No published specifications for this item yet.

Other versions of this model

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Questions about this item

What does the 10 AWG gauge mean once the cable is installed in my system?

The 10 AWG size provides a 6 mm² cross-section with a conductor resistance of 5.09 Ω/km at 20 °C, reducing power loss over the 40-foot run.

What standard do the connectors follow and what voltage does it limit?

The self-locking male and female connectors are rated to 6500 V test voltage and carry up to 57 A continuous current.

What clearance and mounting method does the 40-foot kit need?

The IP68-rated, UV-resistant PPO jacket allows direct burial and operates from -40 °C to 90 °C without extra conduit.

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