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ProMariner 43012

Review Last Updated: June 2024
Nancy Perry
Product Review by Nancy Perry
Product Features
  • Aluminum Casing
  • Selectable Battery Types
  • Distributed-On-Demand


Today we'll be reviewing the ProMariner 43012.

Our reviews are based on in-depth research and product analysis. Let's dive in!


  • Compact and rugged aluminum deign
  • Protection from overcharging, overheating, too much voltage and ignition problems
  • 3-banks for triple battery charging
  • Supports reverse polarity
  • Supports 12, 24 and 36 volts


  • Doesn't charge 4D batteries

ProMariner 43012 Product Review

With 20 amps at its disposal, the ProMariner 43021 ProSport 20+  recharges batteries in a breeze! Not only does this charger have a speedy fast-charging feature, but the ProSport can also keep batteries topped up over time without overcharging them.

The ProSport has three banks for three batteries that can be charged concurrently. The indicator confirms the charge progression of each battery. Also, this charger is capable of reconditioning older batteries including batteries that are completely dead with a 0% load.

Whether you need a solar-based battery charged for the home or whether you need a battery charged for a trolling motor, the ProSport is versatile and durable thanks to its aluminum casing.

Included in the ProMariner 43021 is reverse polarity, over-temperature, over-voltage, overload and protection from the ignition. Plus – during short or long-term storage, the batteries are reconditioned automatically every month when plugged in.

The advanced technology eliminates time consuming troubleshooting by clearly indicating when the system and battery systems are okay, or if there’s a fault present on a specific battery bank.

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