Ever pulled in after a drive, ran your lights, pump, and slides, and woke up to a battery that wasn't caught up? Choose your charge mode, check the LCD, and help your battery recover overnight so your 12V basics are ready to go.
Most stock converters decide when to charge harder and when to back off, so you don't always know what your battery is actually getting. This adjustable converter puts you in control with three selectable modes: fixed voltage, 2-stage, and full 3-stage smart charging. Pick the approach that fits the way you're using your rig, whether you want hands-off charging and maintenance or you want the converter to stay right where you set it.
With 45 amps available, it's a solid fit when you want your battery to rebound overnight while you're still using the basics. It also supports flooded, AGM, gel, and lithium batteries by letting you manually adjust voltage. So instead of one generic charging pattern on every setup, you can dial in the output your battery calls for, and your setup behaves the way you expect in an RV, a boat, or anywhere you need dependable 12V power.
When your converter keeps jumping between charging modes, your 12V system can feel unpredictable: lights subtly change, fans ramp up and down, and you're left wondering if something is wrong or if it's just the charger doing its thing. Fixed voltage mode solves that by letting you choose one steady output voltage and hold it there, so your 12V gear gets consistent power instead of riding along with boost, normal, and float changes. You get fewer "why did that just change?" moments, you can match a specific voltage your battery prefers, and your voltage stays steadier when multiple 12V loads are going.
The built-in LCD screen shows real-time output voltage, making it easy to confirm that charging is happening at the level you expect. No matter if you're plugged into shore power, running a generator, or testing on the bench, you can watch the voltage climb, settle, and hold where you set it.
The compact, deck-mounted design fits easily in cabinets or utility spaces, and the temperature-controlled fan helps manage heat without adding unnecessary noise. Built-in current limiting, overload, and short-circuit protection support reliable operation whether you're charging overnight or pushing current during short generator runs.
Alternate Instructions
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody. Andy here with etrailer. Let's take a quick look at this PowerMax AC to DC converter with built-in 3-2-1 stage battery charger. Now this is gonna basically be a combination power supply and smart battery charger that's designed for any 12-volt system, like those in RVs, boats, or off-grid setups. And when you plug this into a regular household power outlet, this is going to convert that power into 12-volt DC, which is what most RV and marine electronics run on. But what makes this unit especially useful is that it doesn't just use power, it just doesn't power your 12-volt equipment, it also charges your 12-volt battery safely and efficiently.
It does this using a built-in charger, a built-in smart charging system that can operate in different modes, including three-stage charging. That means that it automatically adjusts how it charges the battery to make the process faster, healthier, and overall better for long-term battery life. Now the 45-amp rating simply means that it can provide up to 45 amps of power, which is plenty for most medium-sized RVs or marine battery banks and onboard systems. This also comes with built in safety protections, like preventing overheating or overloads. And this does have a cooling fan to keep everything running smoothly.
And people typically like this because it's reliable, it's relatively compact, it's easy to install. And talking about the measurements here, beginning with the overall length from end to end, and I'm including our terminals here, we're sitting about 9 1/8 inches long, so almost 10 inches. The overall width, and I'm including the brackets here, about 8 1/8 inches wide. The overall height, about 4 3/16 inches tall. So this is going to turn your household power into clean 12-volt power.
It's gonna keep your battery properly charged at the same time. And it's gonna be a solid all-in-one option if you're looking for dependable power management in an RV, a boat, or other 12 volts set up. If you happen to have any other questions, whether it's about this or anything else that we have here at etrailer, don't hesitate to reach out. We wanna make sure that you're getting exactly what you need. Well, again, my name is Andy.
Thank you for joining me.
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