SKU: 41986542917

Dual Pro SS4 Auto 4 Bank Battery Charger w/2 Bank B.O.S. [SS4AUTO/BOS12V2]

Sale price$472.50 Regular price$525.00
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 15 - Jul 20

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Dual Pro SS4 Auto 4 Bank Battery Charger w/2 Bank B.O.S. [SS4AUTO/BOS12V2]SS4 Auto 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 SS4 Auto 40A 4 Bank Lithium AGM Battery Charger (PN: SS4AUTO). 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 Auto 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 SS4 Auto 40A - 4-Bank Lithium/AGM Battery Charger (PN: SS4AUTO).

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

SS4 Auto 40A - 4-Bank Lithium/AGM Battery Charger

Latest Technology:

  • 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 the 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: 40a
  • Charger Output Voltage: 12/24/36/48v
  • Charging Banks: 4
  • Portable: No
  • Box Dimensions: 3"H x 6"W x 9"L WT: 25.4 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: 41986542917

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.7 ★★★★★
Based on 168 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
C
Verified Purchase
Chris D.
Carnegie, US
★★★★★ 5
Good case
Color: Black
Great watch case. Fits all my 43mm-48mm watches. Any bigger they will run against each other. But altogether a solid purchase.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
C
Verified Purchase
Carlos R.
Chelsea, US
★★★★★ 5
Men’s Watch Box w/24 Slot Display
Color: AllBlack, Color: AllBlack
This mens watch box looks amazing, and nicely fits 24 watches without worrying about damage to the other watches. Each slot has its own location, and not need to worry about the watches rubbing up against each other.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026
M
Verified Purchase
MeMeMey
Houston, US
★★★★★ 4
Nice case
Color: Dark Brown, Color: Dark Brown
Very nice case. Good presentation. Only issue is if watch is over 52mm they can make it a tight fit.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026
M
Verified Purchase
Mark C.
Grantham, US
★★★★★ 5
Nice Case with clear top for 24 Watches
Color: Black
This is my second watch case and I am very happy with it. I like the glass so you can view the watches from the top. This one has a flip up latch which I also like because you can reach down and open the case with one hand. The pillows are a good size, not too big so they do not stretch out your watch bands. I specifically wanted a case to hold as many watches as possible and 24 is about the biggest I could find in this configuration, meaning a box and not some kind of cabinet which I do not have room for
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 29, 2026
V
Verified Purchase
V
Birmingham, US
★★★★★ 1
Not good quality
Color: Black
No the quality is was expecting for the price just card board construction and plastic
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026

recommand products