ProSport HD20 2-Bank Battery Charger

Part Number

ProMariner ProSport HD20 On-Board Waterproof Marine Battery Charger

The ProMariner ProSport HD20, 44020, is a 12V 20A on-board 2-bank waterproof battery charger designed for marine use, great for fishing, pontoon, Jon and pleasure boats. The ProSport HD20 acts as an all-in-one battery charger capable of charging a completely dead battery and maintaining it, keeping fully charged. 

The ProSport HD20's enhanced microprocessor and software control sports a dashboard of new digital features including: fuel gauge style Charge Completion Monitor, Charge Mode LED bar, individual dual mode Full / Fault Battery indicators and 3 digitally selectable performance charge profiles. Fully automatic multi-stage charging enhances battery performance with 5 sequential stages: Analyzing, Charging, Conditioning, Auto Maintain (Energy Saver) and a once a month storage recondition mode that’s safe for short and long term storage. System Check and Battery Status indicators provide real time installation and battery fault status feedback.

Designed for use in harsh environments with industrial grade jacketed DC and AC power cables which include molded strain reliefs and wire splitters. Listed and certified to UL Marine 1236, new energy efficient CEC and DOE requirements. With built-in safety features including dual inline waterproof fuses, reverse polarity, over-temperature, over-current, over-voltage and ignition protection backed by a 3-Year warranty.

12V / 24V

System Voltage


Distributed On-Demand Output

2 Bank

Battery Voltage 12V / 12V

5-Stage Performance Charging Overview

Charge Profiles


Battery Type Charge Profile
Flooded (Lead Acid) 14.6 VDC Conditioning, Maintain 13.4 VDC
AGM / HP AGM 14.7 VDC Conditioning, Maintain 13.6 VDC
Gel Cell 14.1 VDC Conditioning, Maintain 13.8 VDC

Stage 1 - Analyze & System Check: The ProSportHD Mode LED will pulse blue, indicating it is analyzing all battery connections and ensuring each battery is capable of being charged. When completed successfully, the “System Check OK” indicator will illuminate green. This takes approximately 1 minute.

Stage 2 - Charge: The ProSportHD Mode LED will be solid red and the ProSportHD will use all of its available charging amps (as controlled by temperature) until the battery voltage is raised to the selected absorption voltage.

Stage 3 - Condition: The ProSportHD Mode LED will be solid amber. During this mode, batteries will be held at the selected absorption voltage to complete charging while conditioning each battery connected for up to 3 hours as needed.

Stage 4 - Auto Maintain: During this stage, the Mode indicator will be solid green, indicating it is monitoring and auto maintaining your batteries as needed to maintain a full state of charge. At this time, the blue Power LED, green System OK and green Mode LEDs will remain on, letting you know your batteries are ready when you are.

Stage 5 - Storage: During this stage, the ProSportHD will enter into it's once a month Storage Recondition mode. The green Mode LED will pulse, indicating that while your batteries / boat are in storage, the ProSportHD is reconditioning all batteries for up to 3 hours once a month to extend battery life and provide maximum reserve power performance on the water.

For use with Group Size 24, 27, 29/31 Flooded Lead-Acid, VRLA AGM and LiFePO4 (approved) batteries. Not for use with large capacity (4D, 8D) batteries.

More Information
Part Number 44020-PM
MPN 44020
UPC 0 31669 44020 3
Charger Application Marine / RV
Charger Mode Automatic
Charger Type On-Board
Amp Output 20 Amps
Charger Outputs 2 Bank
Input Voltage 120 Volts
Output Voltage 12 Volt, 24 Volt
Dimensions 7.9" x 12.8" x 2.9"
DC Cord Length 6'
CEC Compliant Yes
Warranty 3 Year
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