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ProMariner

ProMariner 44020 ProSport HD Waterproof Marine Battery Charger, 20 Amp, 2 Bank

  • Based on 1,811 reviews
Condition: New
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Availability: Only 7 left in stock, order soon!
Fulfilled by KART IT
Arrives Mar 23 – Mar 25
Order within 5 hours and 6 minutes
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Pattern Name: Charger


Style: 12/24V, 20 Amp, 2 Bank


Features

  • ProSport HD 20A Dual Bank Waterproof Marine Battery Charger (part number 44020) replaces the old ProMariner Gen 3 ProSport 20 (part number 43020)
  • ProMar Digital Technology: Microprocessor and software controlled charging technology for fast, precise charging
  • Distributed-On-Demand Technology: 100% of all available charging amps are utilized by distributing unused charging amps to any one or combination of all batteries as needed
  • Heavy Duty Tri-Surface Extruded Heat Sink Design: Upper, lower and rear facing heat sink design for optimal cooling while delivering true rated constant current charging amps during its two charge mode
  • Expanded LED Display with Completion Status Gauge: LED fuel gauge style completion status. Four color multi-stage mode LED status bar. Multi-stage Charge Mode, System Check OK, individual Battery Status and Battery Type indication

Description

The new ProSport HD features a lightweight, tri-surface heatsink design. This delivers significantly faster charging through optimal cooling, while delivering true rated constant current charging amps during charge mode. Fully automatic multi-stage charging enhances battery performance while extending battery life.

Brand: ProMariner


Color: Unspecified


Product Dimensions: 8.7"D x 16.4"W x 6.3"H


Item Weight: 8.6 Pounds


Output Voltage: 12 Volts


Product Dimensions: 16.4 x 8.7 x 6.3 inches


Item Weight: 8.64 pounds


Item model number: 44020


Batteries: 1 Unknown batteries required.


Date First Available: November 26, 2019


Department: Unisex-Adult


Manufacturer: ProMariner


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Mar 23 – Mar 25

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Great Product
Pattern Name: Charger Style: 12/24V, 20 Amp, 2 Bank
Review Image by Matt Matt
I had the original version of this charger in our Crownline for 8 years and loved it. It worked perfectly, and kept the original batteries that came with the boat working great for that entire time. That is, until it got struck by lightning... So I ordered this, updated version of the same charger. It is exactly as nice as the old one with some nice upgrades including the charging gauge and the easier method of selecting the battery chemistry. I was extremely happy with the first one and would still have it if not for our mishap. I expect this one will carry on as the old one did, keeping my original batteries topped up when the boat is sitting. ... show more
Reviewed in the United States on June 11, 2025 by Matt Matt
    • Good condition
Pattern Name: Charger Style: 12/24V, 20 Amp, 2 Bank
Good product was excellent condition for being a used one will definitely buy again
Reviewed in the United States on January 29, 2026 by Brett Dunlap
    • Great charger
Pattern Name: Charger Style: 12/24V, 20 Amp, 2 Bank
Works great
Reviewed in the United States on December 23, 2025 by Benny M.
    • Great product. I've been using it for a year and I'm still happy with it.
Pattern Name: Charger Style: 12/24V, 20 Amp, 2 Bank
I bought this product one year ago it's been maintaining 2 lead acid banks in my trawler with no problems. Very good value.
Reviewed in the United States on September 26, 2025 by Michelle Z.
    • Quality.
Pattern Name: Charger Style: 12/24V, 20 Amp, 2 Bank
Review Image by DW DW
Review Image by DW DW
Review Image by DW DW
Review Image by DW DW
At first glance it looks very high quality, I thought it was smaller, but I was surprised, it has a very good finish, it is very heavy, it seems very strong, now I have to think about where to place it in my boat, because according to the instructions it should not be near the batteries due to the gases they produce, this has 2 cables 6 feet long for the connection to each battery and the power input cable, I used it for 2 12V batteries in a 18-foot Robalo boat from 1995. ... show more
Reviewed in the United States on February 24, 2025 by DW DW
    • Pro Mariner 20
Pattern Name: Charger Style: 12/24V, 20 Amp, 2 Bank
Easy and quick install
Reviewed in the United States on May 24, 2024 by ED LUHRMAN
    • That it charges my batteries
Pattern Name: Charger Style: 12/24V, 20 Amp, 2 Bank
Works well maintaining my batteries with no problem
Reviewed in the United States on January 30, 2025 by Bub
    • BATTERY TYPE SELECTION
Pattern Name: Charger Style: 12/24V, 20 Amp, 2 Bank
I installed this unit today. The unit appeared very good and installed easily apart from the fact that access to my batteries and the installation site in my boat is limited. The unit provides the ability to select the type of batteries used.. i.e. Flooded cell, AGM and Gel. The default is flooded cell. My batteries are AGM and I had a hard time selecting that type. The selection can only be made when the Mode Light is pulsating blue. In my case the pulse lasted only about one second which is insufficient since during that time one has to hold the selection button 2 seconds and then cycle through the different types. Then hold the button another 2 seconds. My batteries in fairly good shape and it didn't take long for the unit to do its preliminary checks, thus the blue light became steady fast. I assume that this procedure will be requited each time the unit is plugged in. I will call the manufacturer after the holidays to get an explanation. ... show more
Reviewed in the United States on December 24, 2020 by Jane Lonchambon

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