Dual Pro SS4 4 Bank Battery Charger w/2 Bank B.O.S.
SKU: 82960832740

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

Sale price$496.79 Regular price$551.99
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 9 - Jul 14

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 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: 82960832740

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.8 ★★★★★
Based on 842 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
R
Verified Purchase
RuRu
Lowell, US
★★★★★ 5
Absolutely worth the money!!
I'm 38 and I've never had eczema but I did always have sensitive skin. About a week ago I noticed a dry patch under my eyelid and boy did it flare up very quickly. I tried several plant based products for eczema but it just burned. I decided this product would be my final purchase before going to urgent care. I received this product 2 days ago. After reading the reviews I decided to slowly add this to my skin. Now it did burn on the part that was super worse than the other so I made sure to put very thin amounts till my skin could handle a thick application. Id say I put the cream on about 6times the first day by the next day I could already see the difference the swelling and redness went away. The second day I did the same no more slight burning my skin is still dry but it is healing. I would definitely give it a try if you're experiencing eczema for your first time!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 28, 2025
T
Verified Purchase
Tricia Baker
Lake Worth, US
★★★★★ 5
Itch-Free Face :)
This cream made a difference day one! It soothed the skin around my eyes and eyelids plus on my face. I forgot to wash my face one night and my skin was still outbreak free and felt so smooth. I haven't had itchy skin since I started using this cream. I would definitely recommend to a friend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 22, 2026
J
Verified Purchase
Jennifer Maldonado
Waukegan, US
★★★★★ 1
Ouch! I paid WHAT for this?
This "eczema cream" contains alcohol. It says you can use it on your face and body. I applied the cream to my face and it burned my eyes. I then read that the ingredients contain alcohol. It did NOT help with my eczema at all. Everyone's skin is different, but I personally was very disappointed especially at $20 for 2oz. that the product ingredients were not soothing, burned my eyes, and dried out my skin more than it already was.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
A
Verified Purchase
Amazon Customer
Fort Morgan, US
★★★★★ 5
Effective and simple
Love this cream !!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 5, 2026
M
Verified Purchase
Mary C
Omaha, US
★★★★★ 5
Eczema Relief! Everyday use
Wow. I have been struggling with eczema / red rashes around my eyes on and off for over a year. Its gotten really bad as the cold weather in Chicago has irritated my skin really bad. After one use of this brand, my eyelid skin is already recovering. I tried the ointment first and then the cream version as well. I find the ointment works best overnight for me and the cream is a good morning option, as i do like to wear makeup most days. Im definitely going to start using the cream as part of my everyday skincare routine. My concealer lays over it so perfectly and theres NO patchiness and NO flakes. The ointment and cream of this brand is so good at disguising the dryness and relieving the redness. I can’t believe I didn’t find this sooner its so inexpensive and works so well. I have such sensitive skin and am very hesitant when trying new products. If you’re undecided on this product, give it a try. This is definitely a repeat purchase of mine.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 24, 2026

recommand products