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ProMariner ProSportHD20 12v 24v 20 Amp 2-Bank Marine Battery Charger

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Product InformationStore Part Number: 44020


Replaces: ProMariner 42020, ProMariner 43020

The Professional Mariner ProSportHD 20 is a 12v 24v 20-Amp 2-Bank Waterproof Marine smart charger. The ProSportHD series is the next evolution to the ProSport line featuring tri-surface heatsink design that is both lightweight and waterproof.

The ProSportHD 20 is compatible with group 24 to group 31 Flooded, AGM, High-Performance AGM also known as Pure Lead AGM, and Gel cell batteries with an amp/hr. range of approximately 75 to 135 AH. The charger has two 12 volts outputs meant for individual 12v batteries or battery banks that are no larger than 135 AH per bank. The charger can be used to charge two 12v banks or one 24v battery bank using 12v batteries.

The ProSportHD 20 has an enhanced microprocessor that controls charging and features software that provides the charger’s status and battery charge completeness. The charger features 5-stage charging which analyzes, charges, conditions, maintains, and once a month will recondition the battery.

The ProSportHD series chargers are built for harsh environments with industrial grade components. The charger is Listed and UL Marine 1236 Certified and meets the new energy efficiency standards set by the DOE and CEC.


  • Compatible with 12v Group 24 to Group 31 Flooded, AGM, HP AGM, & Gel Cell Batteries.
  • Distribute on Demand Charging - Charger can distribute the total amperage to any one battery or combination of all batteries as needed.
  • Auto-Maintain Energy Saver Mode
  • Fully Automatic 5-Stage Charging
  • Easy Installation and Operation
  • 3-Year Warranty


Note: Recommended for Group 24-31 Batteries. Not for 4D or 8D Group Size Batteries.

Tech Specs

  • Dimensions (LxWxH): 12.8 x 7.9 x 2.9 in
  • Weight: 7.2 lbs
  • Weight Shipped: 11 lbs
  • AC Input Voltage: 120 VAC
  • AC Input Current: 6.5 A
  • Compatible DC System Voltage: 12v & 24v
  • Model: ProSportHD 20
  • Manufacturer: Pro Mariner
  • DC Output Voltage per bank: 12v
  • DC Output Current: 20 A
  • Output Banks: 2
  • Cable Length: 5 Feet each Bank
  • IP Rating: IP67
  • Warranty: 3 Year
  • Manufacturer Part #: 44020
  • UPC: 031669440203
  • Made In: China

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Specification Sheet

Order Line: 1-800-362-5397
M–F 6am–5pm PST
Tech Help: 541-474-4421
Fax: 541-471-6014
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Grants Pass, OR 97526