ProMariner ProSportHD 20 Gen 4 2 Bank Marine Charger

The ProMariner ProSportHD 20 Gen 4 is a 20-amp 2-bank on-board marine battery charger from the Heavy Duty Recreational Series, featuring a tri-surface extruded heat sink design that delivers significantly faster charging through optimal cooling while maintaining true rated amp output during charge mode. Up to 40% lighter than epoxy-filled chargers, it is built for harsh marine environments with industrial grade jacketed AC and DC cables with molded strain reliefs and wire splitters.

Powered by the ProMar Digital Technology Microprocessor, this charger delivers fully automatic 5-stage digital performance charging that analyzes, charges, conditions, auto-maintains, and reconditions batteries once a month during storage periods. Distributed-On-Demand Technology utilizes 100% of available charging amps to any one bank or combination of both banks as needed. The expanded LED display with completion status gauge, four-color multi-stage charge mode indicator, System Check OK, and individual battery status and battery type indication provide complete charging visibility. Backed by a 3-year warranty and a dependable 2-bank marine charging solution alongside other fishing and boating electronics.

Key Features

• Tri-surface extruded heat sink design
• ProMar Digital Technology Microprocessor
• Distributed-On-Demand Technology
• Expanded 4-color LED completion status gauge
• Auto-maintain energy saver mode

Frequently Asked Questions

What battery types is the ProSportHD 20 Gen 4 compatible with? It supports Group 24–31 Flooded, AGM, HP AGM, and GEL batteries with 3 digitally selectable charge profiles.

Is the ProSportHD 20 Gen 4 waterproof? Yes, it is built for use in harsh marine environments with waterproof inline fuses and ignition protection, certified to Marine UL 1236.

What is the warranty on the ProSportHD 20 Gen 4? It is backed by a 3-year warranty.

How does this differ from the ProSportHD 20 Plus Gen 4? The ProSportHD 20 Gen 4 is a 2-bank 12/24V charger, while the Plus version adds a third bank and extends compatibility to 36V systems.