SKU: 54165304239

Dual Pro SS3 Auto 3 Bank Battery Charger w/3 Bank B.O.S. [SS3AUTO/BOS12V3]

Sale price$334.78 Regular price$371.98
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Ships within 48 hours · Estimated delivery Aug 16 - Aug 21

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Description

Dual Pro SS3 Auto 3 Bank Battery Charger w/3 Bank B.O.S. [SS3AUTO/BOS12V3]SS3 Auto 3 Bank Battery Charger with 3 Bank B. O. S. This kit combines Dual Pros B. O. S. Battery Optimization System 12V 3 Bank (PN: BOS12V3) and Dual Pros SS3 Auto 30A 3 Bank Lithium AGM Battery Charger (PN: SS3AUTO). B. O. S. (Battery Optimization System) 12V 3 Bank B. O. S. actively shuttles energy between batteries to keep the pack balanced, increasing battery strength and longevity. Batteries in a pack will become out of balance and the pack is

SS3 Auto 3 Bank Battery Charger with 3 Bank B.O.S.

This kit combines Dual Pro’s B.O.S. Battery Optimization System - 12V - 3-Bank (PN: BOS12V3) and Dual Pro’s SS3 Auto 30A - 3-Bank Lithium/AGM Battery Charger (PN: SS3AUTO).

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

B.O.S. actively shuttles energy between batteries to keep “the pack” balanced, increasing battery strength and longevity.

Batteries in a pack will become “out of balance” and the pack is only as good as its “weakest link”. In watercraft applications, this is further compounded when the trolling motor battery is used for peripherals and/or to assist the cranking battery.

B.O.S. actively shuttles energy as needed between batteries wired in series to ensure equal voltage before, during, and after charging.

B.O.S. keeps packs balanced, enabling maximum performance, and quadruple run time on the water.

Premature battery failure due to an unbalanced pack has been, unfortunately, accepted as the ‘norm’ for decades. The B.O.S. answers this call with a BSAP-24 algorithm that can accurately predict and select the battery that needs additional energy to match the other batteries within the pack. This simultaneously and successfully extends the life of each battery in the pack, as well as increasing run times.

Features:

  • Available in 6V, 8V, and 12V configuration
  • Up to six batteries in a series
  • Battery Selection and Prediction (BSAP-24) algorithm
  • Less than 1mA sleep mode
  • Transfer rate up to 7.5A
  • Self-powered
  • Any type of battery chemistry

Used in Any Application Where Batteries Are in Series:

  • Marine
  • Golf
  • Industrial
  • Aerial Equipment
  • Solar Power
  • Electrical Vehicles
  • Communications
  • Defense/Military

SS3 Auto 30A - 3-Bank Lithium/AGM Battery Charger

  • Detects if a battery is Lithium or AGM
  • Automatically charges both Lithium and AGM batteries for optimal performance
  • Fully automatic. Completely and safely charges both Lithium and AGM batteries
  • Algorithms designed and validated with battery manufacturers for a 100% charge
  • The startup feature will wake up batteries that have turned off due to low-voltage protection
  • Auto return to charging feature
  • Quickest charge times in its class
  • Unbeatable performance, reliability, safety, and quality delivered by DUAL PRO®

Features:

  • Waterproof - Use on land and in fresh and saltwater
  • TROUBLE-FREE—Just Plug It In and Forget It!
  • Independent outputs
  • Fully automatic/multi-stage charging
  • On-board diagnostic codes
  • FCC 15 Parts A & B interference compliant
  • Approved and meets ISO 8846 Marine standards
  • Ignition protected (US Coast Guard 33 CFR 183.410)
  • 3-Year Warranty

AutoProfile Intuitive Charging Technology Lithium/AGM

Professional and Sportsman Series chargers have set the standard in the marine industry for more than two decades, known as the safest, most reliable, and best performing chargers in the industry.

AutoProfile Intuitive Charging Technology provides flexibility for a charging system, ready for the ever-changing lithium battery technologies. No matter if users choose Lithium or AGM batteries for the boat, Dual Pro is ready to keep a boat on the water longer, enhancing battery performance and extending battery life.

Specifications:

  • Charger Input - Voltage: 120v
  • Charger Output - Amps: 30a
  • Charger Output Voltage: 12/24/36v
  • Charging Banks: 3
  • Portable: No
  • Box Dimensions: 3"H x 6"W x 9"L WT: 20 lbs

Quick Guide (pdf)
Owner's Manual (pdf)
Brochure (pdf)
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 54165304239

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4.4 ★★★★★
Based on 12 reviews
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Demosthenes
Bozeman, US
★★★★★ 4
Almost perfect!
Color: With Coin Pocket - Forest Brown
I purchased this wallet primarily for its generous number of conveniently located slots and its coin pocket. If you can't fit everything you want to EDC in this wallet, you need to think about getting a sling bag! Having returned the same model in Grizzily Brown due to a stitching defect and ordered this one in Forest Brown, I can see it is a richer, lighter shade and the finish seems smoother and more refined. Some of my cards were tight in previous wallet slots, but everything fits great in this one. Why the one star off? First, this wallet is about a quarter inch too large in all dimensions, especially thickness. While it doesn't protrude out the top of my back pocket, it is a challenge to close the button on some pants and it is also snug side-to-side, so removal involves some wiggling until pockets stretch and the wallet breaks in. The leather used in its construction is smooth but stiff at first, given that it is about twice as thick as most American or European wallet leather I've owned: think bullhide. The smell is also a little off, definitely natural cowhide but processed with whatever is used to tan leather in India rather than in the United States. Finally, this looks like something that belongs in a pair of jeans or casual pants, NOT pulled out of a suit at a Michelin star restaurant. The stitching, evenness of dye and lines are far from perfect, but what it lacks in looks it more than makes up for in every day function, character, and anticipated durability.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 13, 2026
K
Verified Purchase
KendallTom
Draper, US
★★★★★ 5
The Best Wallet
Color: Boulder Black - Napa Smooth Black
This is the second wallet I have purchased from Bull Guard. The first one is identical and I have used it for approximately one year. The first wallet has held up perfectly. I just decided to buy a second one because I am so happy with the first one and I decided to break up my cards into frequently used in the second, new wallet and less frequently used in the first and older wallet. The capacity of the wallet is excellent. It easily holds all my credit cards, drivers license, bills, insurance ID cards, and my global entry card. The material, workmanship, durability, and quality is also excellent. The wallet is all leather and breaks in perfectly. The size is also perfect fitting perfectly in my rear pocket. For the price, this is the best man's wallet I have ever had and I highly recommend it.
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Reviewed in the United States on November 22, 2025
R
Verified Purchase
Reviews By Mike
Los Angeles, US
★★★★★ 5
Solid Wallet
Color: Wild Buffalo Grey
I recently purchased the ULL GUARD Buffalo Leather Wallet, and I’m genuinely impressed with its quality and craftsmanship. The buffalo leather feels durable and premium—this is a wallet that looks like it’ll stand the test of time. What I love about it: - Thoughtful Billfold Design: The bill compartment includes a separator, which is perfect for organizing cash and checks separately. It’s a small detail that makes a big difference. - Plenty of Storage: There are numerous credit card slots, making it easy to keep all your cards neatly arranged and accessible. - Clear ID Pocket: The transparent ID slot is a convenient touch, especially for quick access to your driver’s license or work badge. Overall, this wallet combines functionality with rugged style. If you're looking for something that’s both practical and built to last, the ULL GUARD Buffalo Leather Wallet is a solid choice.
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Reviewed in the United States on November 7, 2025
A
Verified Purchase
Amazon Customer
Omaha, US
★★★★★ 5
A Quality Wallet
Color: Boulder Black - Napa Smooth Black
So far so good. The wallet has a great feel and is of high quality. It looks great and has plenty of credit card slots and I love the bill holder, with a divider. It is wider than I expected, but it stays thinner than the last minimalist wallet I had so the trade off is worth it to me. I would buy it again.
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Reviewed in the United States on April 28, 2026
T
Verified Purchase
T. Shepard
New York, US
★★★★★ 5
Classic tooling.
Color: Adventure Brown - Vintage Buffalo Brown
Excellent. Extremely well made. Full grain bullhide. Pretty tooling.
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Reviewed in the United States on May 14, 2026

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