ProMariner 15' Universal DC Cable Extender — 12 AWG Tinned Copper, 30A with Waterproof Inline Fuses

ProMariner 51815 15' Universal DC Cable Extender adds 15 feet of ready-to-install, marine-grade DC cable to reach distant battery locations without cutting or splicing. This cable extender is purpose-built for boats and other marine applications where factory or charger-supplied leads fall short. It connects directly to chargers that use ring-terminal outputs and extends reach to bow, center-mount, or stern battery compartments. Built from tinned 12 AWG copper with gold-plated hardware and waterproof inline fuses, it balances flexibility with corrosion resistance for saltwater use.

How does this extender integrate with my existing marine battery charger?

The ProMariner 51815 plugs into any onboard charger that terminates in ring terminals — no alterations to your charger leads are needed. Color-coded positive and negative leads make matching polarity fast and safe, while slide-and-snap insulated covers protect connections once installed.

• Direct fit for chargers with ring-terminal cables — no cutting or splicing
• Color-coded wiring simplifies correct positive/negative hookup
• Insulated snap covers shield connections from spray and debris

Will the wiring handle my boat’s charging load and marine environment?

The cable is rated to carry up to 30 amps, appropriate for many common onboard charging systems and battery maintenance setups. Corrosion-resistant tinned copper conductors plus gold-plated hardware lower electrical resistance and improve longevity in wet or salty conditions.

• 30 amp maximum continuous rating for typical charger use
• 12 AWG tinned copper for durability and improved conductivity
• Gold-plated terminals reduce oxidation and maintain contact quality

How does the product protect the wiring and batteries from faults?

ProMariner includes dual inline waterproof fuses to guard the conductors and attached equipment from overcurrent events or accidental shorts. The fuses are enclosed to keep corrosion out and are positioned inline for straightforward replacement if needed.

• Two waterproof inline fuses for redundancy and protection
• Fuses housed in sealed enclosures to prevent moisture intrusion
• Inline placement ensures faults interrupt power before reaching batteries

How easy is installation aboard a boat or in tight compartments?

Installation is designed to be fast for DIYers or marine technicians: slip the ring terminals over charger studs or battery posts, secure, and snap the insulated covers into place. The 15-foot length gives flexibility routing around obstacles so you can avoid moving heavy hardware or rearranging battery trays.

• No wire cutting, stripping, or splicing required — plug-and-play setup
• Flexible 15' length for routing to remote battery banks or compartments
• Snap-in insulation simplifies finishing and protects connections quickly

Who is this for This extender is aimed at boat owners, marine electricians, and anyone with onboard battery chargers that need additional reach to safely connect to remote batteries. It’s especially useful for vessels with separated battery compartments, center-console layouts, bow-mounted gear, or stern battery locations where charger leads don’t naturally reach. If you need a corrosion-resistant, ready-to-install extension with built-in overcurrent protection and simple polarity matching, the ProMariner 51815 is a practical choice.

FAQ

Q: Is the cable compatible with my charger that uses ring terminals?

A: Yes. The extender is designed for chargers with ring-terminal outputs and installs without cutting or splicing.

Q: Can this handle my charger’s amperage?

A: It’s rated for up to 30 amps, suitable for many marine chargers and battery maintainer setups.