3 bank battery charger for marine 12V and 36V batteries with multiple cables and mode selection
ABYSS 3 bank battery charger for marine 12V and 36V batteries with multiple cable connections
3 bank battery charger for 12V and 36V marine lithium and lead acid batteries with multiple mode selection
ABYSS 3 bank battery charger for 12V and 36V marine batteries with power cord
3 bank battery charger for marine batteries with multiple cables and mode selection panel
3 bank battery charger for marine batteries with multiple cables and connectors
3 bank battery charger for 12V and 36V marine batteries with mode selection and versatile compatibility
3 bank battery charger for marine lithium and lead acid batteries with multiple cable connectors
3 bank battery charger for 12V and 36V marine batteries with multiple connectors and LED indicators
Multi-Bank
Rated 4.73 out of 5
(15 Reviews)

ABYSS® 3 Bank 12V/36V On-Board Marine Battery Charger

Original Price: $699.99   Current Price: $699.99

  • 3 Banks
  • 2 × 12V + 1 × 36V
  • 10A per Bank
  • IP67 Rated

SKU: AB-CRG-12V/36V-3B
  • Two 12V banks plus one 36V LiFePO₄ bank
  • Dedicated 10A charging per bank
  • Selectable battery types on both 12V banks
  • IP67-rated marine construction
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  • 2-Year Free Replacement Warranty
  • Free Shipping
  • Designed in Florida
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Specifications

  • Electrical14 specs
    Charger type
    Multi-Bank On-Board AC Marine Charger
    Power source
    AC shore power
    Input voltage
    120 VAC nominal (105–125 VAC), single phase; not compatible with 230 V / 50 Hz supplies
    Input voltage range
    105–125 VAC (shuts down below 105 VAC and restarts automatically)
    Input frequency
    60 Hz
    Nominal battery voltage
    12 V / 36 V
    Charge (output) voltage
    12 V LiFePO₄ / AGM: 14.4–14.7 V · 12 V wet: 14.1–14.4 V · 36 V LiFePO₄: 43.3–44.2 V
    Charge current
    10 A per bank, all banks simultaneously
    Rated output power
    736 W (3 banks × 10 A)
    Number of banks
    3
    Output configuration
    2 × 12 V / 10 A (selectable LiFePO₄ / AGM / wet) + 1 × 36 V / 10 A (LiFePO₄)
    Battery chemistry
    12 V banks: LiFePO₄, AGM or wet lead-acid (selectable); 36 V bank: LiFePO₄
    Charge profile
    Automatic multi-stage CC/CV with full-charge shutdown and periodic top-up; no trickle on LiFePO₄
    Termination current
    0.8 A ± 0.3 A (12 V / 24 V banks); 1.0 A ± 0.3 A (36 V bank)
  • Mechanical & Connections9 specs
    Dimensions (L × W × H)
    14.2 × 9.6 × 3.8 in (361 × 245 × 99 mm)
    Weight
    19 lb (8.6 kg)
    Housing
    Extruded aluminum heat-sink base, epoxy-filled electronics
    Cooling
    Extruded-aluminum heat-sink base with sealed, waterproof fan
    Mounting
    Ø 6.5 mm mounting holes; M6 / ¼ in fasteners (not supplied)
    AC connection
    Attached 3-conductor cord with NEMA 5-15P grounded plug
    DC connection
    6 ft (183 cm) DC lead set per bank with inline fuse on the red lead
    Status indicator
    Per-bank LED panel — power, battery type and charging status; MODE button on each selectable bank (hold 3–5 s for lithium wake-up)
    What's in the box
    Charger with attached AC cord and DC lead sets, installation & operation manual (fasteners not supplied)
  • Environmental, Protection & Warranty8 specs
    Ingress protection
    IP67 (epoxy-filled)
    Operating temperature
    14 to 104 °F (−10 to 40 °C)
    Relative humidity
    5–95%
    Protections
    Short-circuit; Reverse polarity; No-load (no output without a battery); Over-charge (auto shutdown); Over-temperature (current derating at 176 °F / 80 °C)
    Ignition protected
    Yes
    Certifications
    ABYC-compliant design; certified ignition protected
    Compatible batteries
    Two 12 V batteries (ABYSS 12V lithium, AGM or wet) plus one ABYSS 36V lithium trolling motor battery (60Ah / 75Ah / 105Ah)
    Warranty
    2-year free replacement, then 35% off a replacement through year 5 (manufacturing defects)
Multi Bank Charger User Manual

Key Features

DETAILS THAT MAKE THE DIFFERENCE...

Multibank Battery Charger On Board

  • Smart AC Charging

    Controlled charging gets your batteries ready for the next trip.

  • Built-In Safeguards

    Voltage and temperature protection help safeguard your battery during charging.

  • 10A for Every Bank

    Charge multiple batteries from one onboard unit with dedicated 10A banks.

  • Flexible 12V Charging

    Supports LiFePO₄, AGM, and lead-acid charging for your 12V batteries.

Multibank Battery Charger On Board
  • Smart AC Charging

    Controlled charging gets your batteries ready for the next trip.

  • Built-In Safeguards

    Voltage and temperature protection help safeguard your battery during charging.

  • 10A for Every Bank

    Charge multiple batteries from one onboard unit with dedicated 10A banks.

  • Flexible 12V Charging

    Supports LiFePO₄, AGM, and lead-acid charging for your 12V batteries.

Manuals & Resources

Learn Before You Launch

Learn more about Buying Guide

Buying Guide

Pick the right battery

Learn more about Charging Tips

Charging Tips

Maximize cycle life

Learn more about Installation Gallery

Installation Gallery

See real builds

The Abyss advantage

  • 100% Usable Capacity

  • Unwavering Power

  • Exceptional Voltage Stability

  • Compact, lightweight design

Customer Reviews

Customers praised this marine battery charger for its ability to simultaneously charge 36V lithium and 12V batteries. Reviews highlighted "exceptional service" and "100% professional" support. The charger is noted as reliable and space-saving, though some mentioned it's larger and heavier than alternatives. Issues included poor fuse quality and unclear instructions on battery type settings.

  • 5 stars: 12 (80%)
  • 4 stars: 2 (13%)
  • 3 stars: 1 (7%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
R
Ron Aime (Seattle, US)

I had trouble with my trolling battery. Justin in parts was awesome. This was just my 2nd season with the batteries but the 36V went dead. To trouble shoot he sent a single bank charger to see if battery good at it was! Then he knew the 36V bank 1 in the charger was bad. Once charger were in stock he sent another 3 bank and itt works perfectly. I’ve sent the single bank back to Abyss as he asked! 100% professional folks!! Thanks for a great experience that could have wrecked my summer fishing season with no trolling motor! Ron

Ron Aime review photo
J
Jim Erdman (White Bear Lake, US)

warranty exchange on my charger was executed very quickly without question. Exceptional service!

B
Brian Goldman (Tampa, US)

This has been a great charger so far and with my investment in my Abyss 36v lithium battery for my trolling motor I wanted something specifically designed for it. The 3 bank charger is fantastic and it allows your to select between lead acid, AGM, ir lithium for the 12v banks. As a Captain I stick with reliability. You can't go wrong. Only thing is that it is bigger than most chargers and on the heavy side other than that it has been an amazing charger.

G
GB (Jacksonville, US)

Charger works as expected. It was almost "plug and play". Prior to starting up, we checked fuses. On opening the fuse cartridge, the interior fuse completely pulled apart on all three fuses. Re-inserted a standard fuse and cartridges were able to be sealed and pulled apart without damage to the fuse. Apparently Abyss chose to use a poorly manufactured fuse in a good product.

S
Shane Casey (Orlando, US)
Absolute Perfection

This Charger Solves so many problems for small boats with multiple voltage battery banks. Allowing you to be able to charge a 36V Single Case Lithium and A 12V AGM or Lithium Starting Battery on shore power 115V Input with no funny business. Nick is the Man

J
JASON JONES (Fort Collins, US)
12/12/36

great concept. product appears to be of highest quality. excited to put it to use!

D
Dean Roberts (Stoughton, US)
Nice job charging charging but not very user friendly

The charger had no problem charging two 12V and two 36V connected in parallel. The charger got a bit warm for my liking. What I don’t like is the requirement that the charger be disconnected from all of the batteries to set the battery type. The charger always defaults to Lead Acid and has to be changed to Lithium Irop Phosphate before the batteries can be connected. No word in the manual as to what happens to Lithium Batteries if you forget and charge them as lead acid. In my opinion this is a major design flaw.

C
Chris Ennis (Millsboro, US)
Top quality

I love that the battery charger will charge the 36volt lithium battery and the two 12 volt lead acid batteries at the same time.

C
Chris Magnano (Gibsonton, US)
3 bank charger

Fantastic product. Space saving all in one unit.

M
Michelle Diaz (Hialeah, US)

ABYSS® 3 Bank 12V/36V On-Board Marine Battery Charger

N
Nick Maylor (Fairhope, US)
Awesome charger

Finally a charger that can do it all great product excellent customer service

M
Mark Romanack (Greenville, US)
3 Bank Charging Systems

The Abyss 3 bank 12V/36V battery chargers are perfect for boats with a 12V house battery, 12V cranking battery and 36V deep cycle battery.

J
Joseph Thomas (St. Petersburg, US)
Exactly what I needed

Running two starting batteries and the 36v Abyss TM battery. Didn't want two chargers so this was a perfect match. The unit works great. Giving it 4 stars because the directions that came with it are atrocious.

C
CJ Ruskay (Fairfield, US)
Top tier knowledge and service, and top tier products to match

Ryan and Abyss are top notch. Super knowledgeable, super accommodating. And their products are second to none. Best charger options in the LiFePo4 marketplace, and it's not even close. And the batteries are LEGIT. I wouldn't waste any time looking anywhere else for lithiums and/or chargers

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