Dual Pro RS3 3 Bank Battery Charger w/3 Bank B.O.S.

The RS3 3 Bank Battery Charger with 3 Bank B.O.S. is a comprehensive charging solution designed specifically for marine and boating applications. Combining Dual Pro’s advanced Battery Optimization System (B.O.S.) with the reliable RealPRO Series Battery Charger, this kit ensures your boat’s battery system remains balanced, efficient, and long-lasting, providing peace of mind on every voyage.

B.O.S. (Battery Optimization System) - 12V - 3 Bank

The Battery Optimization System (B.O.S.) actively manages and balances energy between three batteries, enhancing the overall strength and longevity of your marine battery pack. In marine environments, where batteries often support both propulsion and auxiliary systems, maintaining balanced voltage across all batteries is crucial. B.O.S. ensures that each battery operates at optimal levels, preventing premature failure and extending the lifespan of your investment.

Using the innovative BSAP-24 algorithm, B.O.S. intelligently predicts and selects the battery that requires additional energy to match the others in the series. This dynamic balancing act not only maximizes performance but also quadruples run time on the water by ensuring each battery contributes equally to your power needs.

Key Features of B.O.S.

• Available in 6V, 8V, and 12V configurations
• Supports up to six batteries connected in series
• Implements the Battery Selection and Prediction (BSAP-24) algorithm
• Consumes less than 1mA in sleep mode
• Transfers energy at rates up to 7.5A
• Self-powered for seamless operation
• Compatible with any type of battery chemistry

Applications for B.O.S.

• Marine vessels
• Golf carts
• Industrial equipment
• Aerial equipment
• Solar power systems
• Electric vehicles
• Communication systems
• Defense and military equipment

RealPRO Series Battery Charger - 18A - 3-6A-Banks - 12V-36V

The RealPRO Series Battery Charger is a versatile and dependable charging system tailored for everyday marine use. Engineered for boats, automobiles, ATVs, and other recreational vehicles, the RealPRO Series delivers consistent and safe charging without the need for heavy-duty equipment. Whether you’re maintaining your boat’s batteries or charging multiple vehicles, this charger provides the perfect balance of performance and affordability.

Battery Charging Systems Designed for Everyday Applications

• Affordable, reliable, and safe operation
• Unmatched performance and quality
• Plug-and-play functionality for hassle-free use
• Trusted by over 750,000 satisfied customers
• Suitable for a wide variety of applications
• Universal input compatible with 100-240 VAC 50/60HZ

RealPRO Series Features

• Approved for Wet Cell and Absorbed Glass Mat (AGM) batteries
• Designed for both fresh and saltwater environments
• Durable, rugged, and waterproof construction
• Independent outputs with fully automatic operation
• Includes a battery maintenance mode to prolong battery life
• Comes with a two-year warranty
• Includes 5ft DC charge cables and a 3ft AC power cord
• Meets ISO 8846 Marine standards
• Available models support 12V, 24V, and 36V systems
• LED indicators display each battery’s state of charge
• Reverse polarity protection with no installation restrictions
• Ignition protected (US Coast Guard 33 CFR 183.410)
• FCC Part 15 A and B Interference Compliant

Ideal for Various Sporting Applications

• Bass boats
• Runabouts
• Pontoons
• Automobiles
• ATVs
• Golf carts

Product Specifications

Charger Input Voltage	120/240V
Charger Output Amperage	18A
Charger Output Voltage	12V, 24V, 36V
Charging Banks	3
Portability	No
Box Dimensions	3"H x 6"W x 9"L
Weight	14.7 lbs

Additional Resources

Quick Guide (PDF)

Owner's Manual (PDF)

Brochure (PDF)

Product Demonstration

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.