SKU: 16730898665

Dual Pro SS4 4 Bank Battery Charger w/2 Bank B.O.S. [SS4/BOS12V2]

Sale price$387.43 Regular price$430.48
Save 10%

Pay in installments of $107.62 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 22 - Aug 27

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Dual Pro SS4 4 Bank Battery Charger w/2 Bank B.O.S. [SS4/BOS12V2]SS4 4 Bank Battery Charger with 2 Bank B. O. S. This kit includes Dual Pros B. O. S. Battery Optimization System 12V 2 Bank (PN: BOS12V2) and Dual Pros Sportsman Series Battery Charger 40A 4 10A Banks 12V 48V (PN: SS4). B. O. S. Battery Optimization System 12V 2 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

SS4 4 Bank Battery Charger with 2 Bank B.O.S.

This kit includes Dual Pro’s B.O.S. Battery Optimization System - 12V - 2-Bank (PN: BOS12V2) and Dual Pro’s Sportsman Series Battery Charger - 40A - 4-10A-Banks - 12V-48V (PN: SS4).

B.O.S. Battery Optimization System - 12V - 2-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

Sportsman Series Battery Charger - 40A - 4-10A-Banks - 12V-48V

Dual Pro’s customers asked for a series of chargers that were smaller, lighter, and economically affordable. The Sportsman Series of chargers answers these needs. This line of chargers is designed for all types of battery applications. Sportsman chargers have all the safety and reliability features that have made PRO Charging Systems chargers the #1 choice of most boat manufacturers, dealers, and over 750,000 customers across the country. Advanced microprocessors and LED readings make the units even easier to use.

Battery Charging System Designed for Use On Land and in Fresh and Salt Water:

  • The “Green” Charger: Totally “Repairable” Not a Throw-Away
  • Unmatched Performance, Reliability, Safety and Quality
  • TROUBLE FREE – Just Plug It In and Forget It!
  • Join Over 750,000 of Dual Pro’s Satisfied Customers!
  • Fully Automatic and Waterproof

Features:

  • Approved for Wet Cell and AGM batteries
  • Models also available for Gelled Electrolyte batteries
  • Designed for use in fresh and saltwater
  • DeltaVolt® Intuitive Charging Technology
  • Waterproof, dependable, rugged construction
  • Independent outputs
  • Fully automatic/multi-stage charging
  • Zero spark technology
  • Battery maintenance mode
  • On-board diagnostic codes
  • Temperature-compensated
  • Advanced microprocessor controlled
  • Battery systems available: 12V – 48V
  • LED lights indicate the state of charge
  • Reverse polarity protected
  • No installation restrictions
  • FCC Parts A & B interference-compliant
  • DC charge cables = 5' AC power cord = 3'
  • Approved and meets ISO 8846 Marine standards
  • Ignition protected (US Coast Guard 33 CFR 183.410

May Be Used in Many Types of Sporting Applications Including:

  • Inland Watercraft
  • Salt Water Watercraft
  • Motorcycles
  • Golf Carts
  • Utility Vehicles

Specifications:

  • Charger Input - Voltage: 120v
  • Charger Output - Amps: 40a
  • Charger Output Voltage: 12/24/36/48v
  • Charging Banks: 4
  • Portable: No
  • Box Dimensions: 3"H x 6"W x 9"L WT: 25.8 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: 16730898665

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.6 ★★★★★
Based on 28 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
D
Verified Purchase
dqh
West Palm Beach, US
★★★★★ 5
the BEST BOOK EVER to learn what autism feels like
Format: Hardcover
I have read just about every book ever written (in English) related to autism -- well over 700 of them. This is the best book that communicates what autism feels like, and our life experiences. I'm decades older than the audience the book is intended for; but EVERYONE should read this book to understand we who are different. It also points out several well-known facts: autism has some heredity trails, having just one trusted adult who treats the different child like they are valuable is key to that child being able to cope with the world around them. What surprised me was when an educator with over 25 years of experience in special ed, just did not think the book was that good. That convinced me of the book's unique value: it truly puts the reader in the body and mind of the different child. Some educators cannot do that. The story focuses upon a female -- so not sure how applicable it is to a male different child. I hope some others would test that out. The BEST BOOK EVER to understand what autism feels like. I know as I have been on the autism spectrum since before there was an autism spectrum.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 10, 2023
M
Verified Purchase
Meredith A
West Palm Beach, US
★★★★★ 5
Fantastic read
Format: Hardcover
Read as part of upper elementary book club with 4th and 5th graders. Told entirely in prose from the point of view of a 7th grade girl struggling with changing social dynamics and self-identity, we see Selah learn to advocate for herself amidst family and school challenges. This book made me laugh and cry, but more than anything, it made me cheer Selah on as she discovers what autism means for her.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 16, 2024
S
Verified Purchase
stargazer
Phoenix, US
★★★★★ 5
Good Different
Format: Hardcover
A Great Book.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 3, 2025
Y
Verified Purchase
YZK
Phoenix, US
★★★★★ 5
Great Gift
Format: Hardcover
Great Fun Book with whole details. My son loved the book so much.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 27, 2025
M
Verified Purchase
M.Tidwell
Charlottesville, US
★★★★★ 5
Fun educational book
Format: Hardcover, Format: Hardcover
This book is a big hit! My 5 year old son and I read it so many times since we ordered this in April. It has cute illustration and 60 flaps and pop-ups which make the book even more exciting. And because of this, I don’t recommend this book to young kids under 3 though. Some flaps might be tricky for younger kids. Even I as a parent learned so much about construction.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2025

recommand products