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Marinco 2731A ChargePro 30A 3-Bank On-Board Marine Battery Charger

Manufacturer

Marinco

<h3>About Marinco: Trusted Marine Electrical Innovation Since 1972</h3><p><strong>Marinco</strong> has been a cornerstone of the marine electrical industry for more than five decades. The brand traces its roots to 1972, when founder Bud Toly, frustrated by the poor quality of available marine electrical gear, set out to engineer something better from the ground up. That spirit of problem-solving and uncompromising quality has defined Marinco ever since. Today, the brand is part of the Navico Group — a global leader in marine technology — and continues to serve everyone from weekend bass anglers to commercial vessel operators and major OEM boatbuilders.</p><p><a href="/11273-marinco">Marinco</a> is best known as a world-class manufacturer of shore power systems, but its catalog spans far beyond that single category. The brand's engineers design products for the real-world punishment of salt, spray, and constant moisture — environments where inferior components fail quickly and safe, reliable electrical connections are non-negotiable. Industry involvement is baked into the brand's DNA: <a href="/11273-marinco">Marinco</a> actively participates on ABYC standards committees, helping shape the very regulations its products are built to exceed.</p><h3>Shore Power, Signaling, and Ventilation — Built for the Water</h3><p>At the core of Marinco's reputation is its shore power lineup: heavy-duty cordsets, inlets, outlets, and adapters engineered for both 30-amp and 50-amp applications. The patented EEL (Easily Engaged Lock) jaw-clamp system allows one-handed connection without the frustration of threaded locking rings, and many premium connectors feature built-in LED power indicators so boaters can confirm live power at a glance. Products are engineered to CSA and UL standards, and nickel-plated brass contacts are used throughout to resist the corrosion that plagues lesser marine connectors.</p><p>Beyond shore power, Marinco offers an impressive range of marine accessories that keep vessels safe and comfortable. The brand's <a href="/11273-marinco-air-horns-201608">air horns</a> are a staple on boats of all sizes, delivering the kind of authoritative, regulation-compliant signals that can genuinely protect lives on the water. And for boaters who want to keep cabin air fresh without running down their battery bank, Marinco's <a href="/11273-marinco-solar-cabin-vents-202545">solar cabin vents</a> from its trusted Nicro line provide around-the-clock ventilation powered entirely by the sun — and a built-in rechargeable battery when the sun goes down.</p><h3>Why Boaters Choose Marinco</h3><ul><li><strong>OEM Trust:</strong> Major boatbuilders specify Marinco electrical components from the factory, a testament to the brand's reliability standards.</li><li><strong>Standards Leadership:</strong> Active participation on ABYC committees means Marinco products don't just meet standards — they help write them.</li><li><strong>Marine-Grade Engineering:</strong> Every product is designed for salt air, vibration, and moisture, not just adapted from a land-based design.</li><li><strong>Complete System Thinking:</strong> With over 800 electrical products engineered to work together, Marinco makes it easy to build a cohesive, safe onboard electrical system.</li><li><strong>Decades of Refinement:</strong> Over 50 years of feedback from real boaters has shaped every product iteration, from connector geometry to diaphragm materials.</li></ul><p>Whether you're outfitting a new build, upgrading aging shore power hardware, adding a safety horn, or solving a below-decks ventilation problem, Marinco brings proven engineering and category-defining products to every corner of the job.</p>

Part Number

2731A
06/21/2036 10:29 AM
Sale Price

$389.99

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Product Details

The Marinco 2731A Guest ChargePro is a professional-grade 30-amp on-board marine battery charger designed to independently charge three 12V battery banks with 10 amps per bank. This advanced charger features high-frequency digital charging technology with fully automatic 5-stage performance charging, providing optimal charging for flooded and AGM lead-acid batteries.

Key Features:

  • Three independent 12V banks with dedicated charging, sensing, and control per bank (10 amps each, 30 amps total)
  • IP67 waterproof rating with low-profile flangeless extruded aluminum housing sealed with molded gaskets and heavy-duty end caps
  • Compatible with three 12V battery systems, one 24V and one 12V system, or one 36V system
  • Expanded LED charge status monitor with battery fault detection for each bank
  • Built-in safety protections including reverse polarity, over-current, over-voltage, over-temperature, and ignition protection
  • In-line fuses for maximum DC wire protection
  • Up to 40% lighter than previous generation epoxy-filled plastic chargers
  • Shock-resistant design suitable for both fresh and saltwater applications

The 2731A includes three 6-foot DC output cables with heavy-duty strain reliefs and one 6-foot AC input power cable with NEMA 5-15P plug. Ideal for charging Group 24 through Group 31 batteries up to approximately 110 amp hours per bank. Perfect for powering 36V trolling motor systems, multiple starting batteries, or combination battery bank configurations. Backed by a 2-year manufacturer warranty.

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