At the end of a day on the water, you plug in expecting both batteries to recover, but one never quite gets fully charged. This 2-bank, 20-amp charger shifts power where it's needed so both batteries charge evenly and are ready by morning.
One of the biggest headaches in a multi-battery setup is ending the day with one weak battery dragging down the whole system while the other doesn't need the same charge. This charger fixes that with a 20-amp, 2-bank layout and Distributed-On-Demand technology that automatically transfers unused charging amps to the battery that needs it most. Instead of sending fixed output to every bank regardless of condition, it shifts charging where the demand is. You end up with a more balanced charge across your trolling motor and engine start batteries, so both batteries are ready without leaving one behind.
Charging gets frustrating when you don't know if the batteries are charging, conditioning, or just sitting there. This unit runs a fully automatic 5-stage digital sequence with Analyze, Charge, Condition, Auto Maintain (Energy Saver), and monthly Storage Recondition, then keeps monitoring the batteries long-term. The expanded LED display adds a fuel gauge style charge completion monitor, a four color multi-stage mode LED bar, and individual battery status indicators that show Full in green or Fault in red for each bank. You can glance at it and see what each battery is doing instead of tracing wires or wondering if the charger is still working. Designed for 110-120 VAC, 60 Hz input, it connects directly to standard shore power commonly used in North America.
Wrong charging profiles are a fast way to create charging problems or shorten battery life, especially when battery chemistry changes across boats and upgrades. This charger gives you selectable charging profiles for Flooded, AGM, Gel, and approved LiFePO4 batteries, so you're not stuck with one generic program. It also supports 12/24 Volts, which matters in setups built around different battery arrangements. When the profile matches the batteries on board, charging behavior stays predictable and you spend less time chasing weak performance that comes from a mismatch instead of the batteries themselves.
Onboard chargers live in rough places, and heat, spray, vibration, or a wiring mistake can turn into a failure at the worst time. This one uses a heavy duty tri-surface extruded heat sink design for optimal cooling and true rated constant current charging, plus 100 percent waterproof IP67 construction for harsh marine environments. Built-in protection covers dual inline waterproof fuses, reverse polarity, over-temperature, over-current, over-voltage, and ignition protection, and the System Check OK indicator confirms proper installation and battery readiness. Once it's mounted and wired correctly, you've got a charger built to stay on the job in the same conditions your battery system already has to live through.
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everyone. Steve here with etrailer. Today we're taking a look at the ProMariner ProSportHD 20 plus Battery Charger. So folks, if you're running two batteries on your boat, this onboard charger is designed to keep things simple, reliable, and ready for the water. So again, this is a 20-amp, two-bank onboard marine charger. So you can hook up one, two different batteries.
It's gonna maintain both of those simultaneously. This is perfect for setups that you have with a cranking battery and probably a trolling motor battery as well. And when you come in for the night, you just simply plug it in and you are ready to go the next morning. It's got an onboard charger, it mounts permanently inside the boat. So again, just plug it in at night, the next day it's gonna be ready to go because it automatically handles everything.
It senses the different battery types. It is a two-bank charging system at 20-amp charging output. It's a multi-stage charging and this is built for water. It's a waterproof marine construction. It's very compact.
Comes in at 7.9-inches tall by 12.8-inches wide and about 2.9-inches deep. So again, folks, this is made for those marine conditions. So again, it's made for waterproof, vibration, you know, rocking the boat from the waves, all those kind of things. All the wiring is heavy gauge, heavy duty, it's all insulated. Even your fuses in-line have those waterproof, sealed up location insulation, you know, areas here where the fuses are.
And then everything here has been sealed as well. So if you want a durable, low-maintenance charger that's gonna keep those marine batteries charged and ready to go every day, this ProSport Heavy-Duty 20 is a great option. You also do have lights on the face of it that's gonna light up automatically when it's doing its thing and give you readouts in real time as well. Folks, that's gonna wrap up our quick look together. I'm Steven. Thanks for watching.
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