After a long day on the water, you plug in hoping all three batteries recover, but one always lags behind. This 20-amp, 3-bank charger shifts power where it's needed most, so every battery charges evenly and is 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 others don't need the same charge. This charger fixes that with a 20-amp, 3-bank layout and Distributed-On-Demand technology that automatically transfers unused charging amps to the batteries that need 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 the system is ready as a complete package instead of leaving one bank 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 bank 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 12/24/36 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 ProSport Heavy Duty 20 Plus Marine Battery Charger So if you are tired of going into the boat early morning and finding out that you don't have enough charge to actually leave for the day or to get something started, or the troll motor battery is dead, or you're onboard bank, it's just not up to par, as you know, that's gonna get really old quick. It gets very disheartening as well. So this is gonna be a nice, dependable way to solve that problem. You can keep multiple marine batteries charged and maintained. Three to be exact.
This is a 20 amp three bank on onboard marine charger. It's been designed to charge up with those three batteries. Ideal for setups, again with troll motors, cranking and boating accessories. And one of the biggest conveniences for me, or biggest benefits for me is the convenience. So once you get this mounted the first time, all you have to do after your trip, plug it in, you're done, let it do its thing in the middle of the night.
You're gonna come out the next day, ready to go back on the water and have some fun or catch some fish for work or whatnot, and it's gonna be ready to go. You're gonna have a peace of mind. You're gonna stop worrying about your batteries being ready to go. It has onboard lights and everything, as well to let you know everything's good to go, as well. All the connections are marine grade.
Everything here has a heavy duty waterproof design, so it can withstand the moisture, the vibration, the heat, all of those harsh environments. The waves crashing around the boat, everything, it's ready to go. It can handle all of that. It's got three bank charging, heavy duty marine construction, as I mentioned. It's very compact, so it's gonna easily fit onboard.
And I'll give you some quick rough, overall, about 13 inches long, and the main body is about seven inches by about three and a quarter tall. So again, just some rough estimates, they aren't exact. But that gives you an idea of how compact this really is. So I'm a big guy. I got two big hands. It's a little bit wider, maybe three hands or something. So it's not too big. It's a durable, low maintenance onboard charger. Again, it's gonna keep your batteries ready for the next day on the water. This is the ProMariner ProSport Heavy Duty 20 Plus. I'm Steve with etrailer. Thanks for watching and have fun out there on the water.
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