How many amps and banks does each ProSportHD Gen 4 charger have?

The line ranges from the 44006 at 6 amps/1 bank, the 44008 at 8 amps/2 banks (12/24V), the 44012 at 12 amps/2 banks, up to the 44020 at 20 amps/2 banks and the 44021 at 20 amps/3 banks.

How do I pick the right number of banks for my boat?

Choose one bank per battery or battery group you want charged independently. A single starting battery needs 1 bank, a starting battery plus a house bank needs 2 banks, and adding a thruster or generator battery calls for 3 banks like the 44021.

How do I pick the right amperage?

As a rule of thumb, size total charger output to roughly 10-20% of your combined battery bank's amp-hour capacity so batteries recharge efficiently without excessive heat; larger house banks benefit from the 12-20 amp models.

What battery types can these chargers maintain?

All ProSportHD Gen 4 models charge and maintain Group 24-31 Flooded, AGM, HP AGM, and GEL batteries using the same 5-stage fully automatic charging program.

Are these chargers safe to leave plugged in all season?

Yes, the 5-stage fully automatic charging program prevents overcharging by moving batteries into a maintenance/float stage once fully charged, so the chargers can stay connected at the dock long-term.

Is the 44008 different from the other models?

Yes, the 44008 is the only model in this line that supports 12/24V systems, making it the choice for boats wired with a 24-volt battery bank in addition to standard 12-volt setups.

Are these chargers waterproof for onboard installation?

Yes, every model in the ProSportHD Gen 4 line uses a waterproof housing with industrial grade jacketed AC and DC cables and molded strain reliefs, rated for installation in bilges and other harsh onboard locations.

Do these chargers replace older ProMariner models?

Yes, the ProSportHD Gen 4 line replaces earlier ProSport models with equivalent amperage, for example the 44012 replaces the 43012.

ProMariner ProSportHD Gen 4 Marine Battery Charger

ProMariner ProSportHD Gen 4 Onboard Marine Battery Charger - 6 to 20 Amp, 1 to 3 Bank

$135.99

Output (Amps) 6 Amp 8 Amp 12 Amp 20 Amp

Charging Banks 1 Bank 2 Bank (12/24V) 2 Bank 3 Bank

The ProMariner ProSportHD Gen 4 series is a lineup of fully automatic, waterproof onboard marine battery chargers built to keep flooded, AGM, HP AGM, and GEL batteries topped off and healthy season after season. Each charger uses a 5-stage fully automatic charging program that soft-starts, bulk charges, absorbs, and maintains connected batteries without risk of overcharging, so boats can be plugged in at the dock indefinitely. The ProSportHD line scales from a compact single-bank 6 amp charger for smaller boats and single-battery setups up to a 3-bank 20 amp unit capable of maintaining a full house bank plus a dedicated engine-start battery. All models share the same rugged, marine-grade construction: waterproof housings, industrial jacketed AC and DC cabling, molded strain reliefs, and UL Marine 1236 certification for safe onboard installation below deck or in the bilge.

Specifications

Brand: ProMariner
Charging Stages: 5-Stage Fully Automatic
Battery Types Supported: Flooded, AGM, HP AGM, and GEL, Group 24-31
Output Voltage: 12 Volts DC (12/24V on the 44008)
Input Voltage: 120/240 Volts AC
Certifications: UL Marine 1236, CEC, DOE, FCC Class B
Warranty: 3 Year Manufacturer Warranty
Housing: Waterproof, corrosion-resistant marine-grade enclosure

Sizes & Options

This ProSportHD Gen 4 line is available in outputs ranging from 6 Amp to 20 Amp, across 1-Bank, 2-Bank, and 3-Bank configurations. Match the charger to your battery bank: choose the number of banks equal to the number of separate batteries you need to charge independently (for example, a 3-bank charger can maintain a house bank plus a starting battery plus a bow thruster battery on its own isolated circuit), and size the total amperage so each bank receives roughly 10-20% of that battery's amp-hour capacity for efficient recharging. The 44008 model additionally supports 12/24V systems for boats wired with a 24-volt bank.

ProMariner ProSportHD Gen 4 Onboard Marine Battery Charger - 6 to 20 Amp, 1 to 3 Bank

Specifications

Sizes & Options

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