Product Description

Custom Marine Battery Cable

Typical Production Lead Time: 2 Business days to ship

Built to order, non returnable.

Get the exact length, terminal style, and color you need with our fully customizable marine-grade battery cables. Built specifically for boats, our hand built cables ensure reliable power connections that withstand harsh marine environments. With corrosion-resistant tinning, precision hydraulic crimps, and fine-stranded flexibility, you can have the same quality cables we use in our OEM builds in your own boat.

Why Choose Our Custom Marine Battery Cable?

• Built to Your Specs:
  • End Lugs: Choose from three ring terminal sizes (1/4″, 5/16″, 3/8″) on either end for a perfect fit with common marine stud sizes.
  • Gauge (AWG): Available in 8 AWG, 6, 4, 2, and 1 AWG to suit a range of power requirements.
  • Color Options: Select from red, black, or yellow, with matching adhesive-lined heat shrink for a professional, sealed finish.
• Marine-Grade Quality: Fully tinned copper wire and lugs resist corrosion in saltwater environments for long-lasting durability.
• Color-Matched Heat Shrink: Available in red, black, and yellow with adhesive-lined heat shrink that creates a waterproof seal and looks professional.
• UL 1426 and ABYC Standards: Meets industry standards for safety, temperature, flexibility and performance on the water.
• Professional Crimps: Every cable is assembled with professional hydraulic crimps to ensure a secure, robust connection that won’t fail under load.
• Quick Turnaround: Typically ships in 2 business days—get the quality you need, fast.

Our cables are ideal for replacing corroded or damaged wires, adding new battery setups, or simply upgrading for reliability. We know how frustrating it can be to deal with lugs pulling off or cables that can’t handle marine conditions—each crimp is professional, secure, and the materials we use are built to withstand the elements.

How to Choose the Right Marine Battery Cable for Your Boat

Choosing the correct cable gauge (AWG) is essential for safe, efficient power delivery. This decision depends on the electrical current you need to carry and the distance the cable will run. A larger gauge (thicker cable) can handle more current without excessive heat buildup, making it crucial for high-load devices like trolling motors, stereo amps, main feeder lines, and other equipment that draws significant power. We provide a current rating chart below to help you easily determine the correct size based on your setup.

Also note the stud size required on each end.  Our battery cables allow selection of both sides (A and B).  3/8″ is common on battery positives and most battery switches.  5/16″ is common on battery negatives.  1/4″ is common on many circuit breakers and bus bars.

For longer cable runs, minimizing voltage drop is important. Voltage drop happens when a current (amps) travels through a cable, especially over extended distances, reducing the effective power reaching your devices. With a each foot of the cable run, voltage loss will be higher, leading to decreased performance, especially for sensitive electronics. To counter this, increase the cable size as your cable length grows. For instance, if you need to run power over a longer distance, opting for a thicker gauge can ensure that your power output remains stable and efficient. This simple adjustment can prevent common power issues like dimmed lights or slow operation on devices relying on steady voltage.

Choosing Color:  Red should be used for positive conductors, black or yellow can either be used for negatives.  They are interchangeable, some boats use a black scheme, and some use yellow.  Often yellow is used on boats with 120V loads to differentiate between DC negative and AC positive (also black).

Current Rating Chart

Refer to our current rating chart for exact recommendations, taking into account both the load and distance. This visual guide will help ensure you’re choosing the safest, most effective cable size for your needs.

Use the 105°C column (insulation rating), and the appropriate inside or outside engine space column.

Specifications:

• Conductor: Finely stranded Type III Tinned Copper (marine grade)
• Insulation: Ultra Flexible Polyvinyl Chloride. Resists Acids, Abrasion, Alkali, Flame, Gasoline, Moisture, and Oil
• Color: Red, black or yellow
• Heat shrink: 3:1, adhesive lined
• Terminals: Tinned copper
• Operating Temp: -20˚C to 105˚C, BC-5W2 (105˚C Dry, 75˚C Wet)
• Voltage Rating: 600V
• Applicable Standards: UL Standard 1426 BC-5W2 (Electric Cable for Boat), ABYC E-11, NMMA, USCG 33 CFR Part 183.430, 183.435, SAE J378, 1127, 1128