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PowerMax

PowerMax PM4-100A 100A Deck Mount RV Converter Charger Lithium

Based on 718 reviews
Condition: New
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$189.00

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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Oct 31
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At a glance

Condition
New
Size
100 Amp
Style
Converter - PM4 12V
Model
PM4 100A
Dimensions
12 x 9 x 5 in
Weight
7 lb
Color
Metallic
Warranty
2 Years

Features 5

  • REGULATED 12V POWER: Delivers up to 100 amp DC output for RV electrical loads and battery charging.
  • SMART MULTI-STAGE CHARGING: Helps charge and maintain compatible lead-acid battery banks.
  • LITHIUM COMPATIBLE: Adjustable output supports properly configured lithium charging requirements.
  • DECK-MOUNT DESIGN: Standalone converter format installs near the battery bank or electrical system.

Description

It caters to all your power needs, whether on the road in your RV or using your car's audio system. Connect your car to the charger and enjoy your favorite tunes hassle-free. It reduces output to safe levels if temperatures exceed preset limits. PowerMax is designed for easy installation and can be set up in 10 minutes.

Specs 21

Brand PowerMax
Color Metallic
Item Weight 7 pounds
Input Voltage 110 volts
Item dimensions L x W x H 12 x 9 x 5 inches
Model Number PM4 100A
Global Trade Identification Number 28
UPC 685867998228

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Oct 31

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

Great performance for a reasonable price.
Size: 100 Amp Style: Converter - PM4 12V
Review Image by Donald Parker
Review Image by Donald Parker
Review Image by Donald Parker
I purchased this converter to replace a WFCO 55 converter in my 2019 Venture SportTrek 333VFL. The new converter charges my 2 deep cycle 200Ah batteries with no trouble. My only complaint is the loud fan. But, I can appreciate the need for a high performance fan to keep the converter cool. I took care of the fan noise by installing a fan in the cabinet that the converter is installed in. That fan keeps the cabinet cool and the loud fan no longer turns on. ... show more
Reviewed in the United States on May 13, 2026 by Donald Parker
Thumbs up
Size: 100 Amp Style: Converter - PM4 12V
Easy setup. Easy to change settings. Steady and reliable.
Reviewed in the United States on June 5, 2026 by Disappointed
This is my 3rd one
Size: 100 Amp Style: Converter - PM4 12V
I bought 2 of these a few years back. I misused them by charging lead acid batteries too rapidly with them, and burnt them both out. I had issues with the fuses blowing at first, and went through a lot of fuses. I contacted the manufacturer about buying a replacement board for the first one that burned out, but that didn't pan out. They were very friendly, and very responsive. Great customer support. Fast forward to now...I bought another, this time with proper use as my intent. I installed this to charge a 300AH lithium ion battery. It works as expected, delivers consistent 90 amps(rated at 100 amps) and fully charges a completely dead battery in about 3 hours. I highly recommend this converter. ... show more
Reviewed in the United States on January 11, 2024 by david cole
SWEET DEALS!
Size: 100 Amp Style: Converter - PM4 12V
SWEET DEALS! Works great, EZ installation and better power distribution for 1999 FLEETWOOD BOUNDER 28T. Although you must installation the wire harness bundle from the box roof, pull down some extra wire and mount it on the box floor, maybe on a wood plank.
Reviewed in the United States on November 28, 2025 by SMOKEYtheANIMAL
Powerful and stable
Size: 100 Amp Style: Converter - PM4 12V
I put a power meter on it and charged a power hungry bank of 32 batteries. I have the 100 amp unit. It puts out a steady 80 amps. Sometimes I'll see it go up a bit higher. Brother hooked it up backwards and blew the fuses. Replace the fuses and still works great. Cooling fan is quiet and seems to be variable speed and is rarely on if under 20 amps. The voltage is very stable and the unit puts out higher voltage during the first bulk charge but then when the battery starts accepting less current the unit backs off the voltage to charge slower. Sometimes during this transition the output drops to zero briefly which could be a problem if you're running it as a power supply with no battery when your powered device reduces its current demand, only testing would tell and since I'm not running it that way I'm not sure if your devices would actually lose power or not. I compared it to a 100 amp automotive battery charger from Napa. The Napa charger put out one third of its rated setting no matter what setting I put it on and often refused to charge batteries claiming they were defective. This charger had no such problems and I am very happy so far. I've used it heavily for one month ... show more
Reviewed in the United States on April 13, 2017 by Kimberly Sanders
Beast Mode! 100 Actual Amps of Charge!
Size: 100 Amp Style: Converter - PM4 12V
This is a solid charger! Its a bit heavy, but its not something you'd probably take on a hike anyway! You mount it, wire it, and let it do its thing. Anyway, I am running 4x 100 Amp Hour lithium LiFePO4 batteries off grid, and charging on bad solar day used to take forever. If you have 400 amp hours worth of batteries, your 15 amp charger will have you burning way to much fuel on your generator. But at 100 amps, an hour of charge will sometimes be enough to run the day. Way better! Anyway, I tried to post a link to my YouTube video but Amazon didn't allow that, but you you want, go look for my name on YouTube and you'll find it. Otherwise, I did see an honest 100 amps of charge, measured with my clamp on amp meter multimeter. I'm totally stoked to finally have this online and working! ... show more
Reviewed in the United States on January 18, 2024 by Carlin Comm
Lousy quality. So dissapointing.
Size: 100 Amp Style: Converter - PM4 12V
First of all, the instructions were very poorly written. It talked about dialing in the unit to your specific settings desired. The default it came at attempted to charge my batteries at 13.6 volts and that won't fully charge them. So I followed the instructions and turned the screw it indicated while watching the output voltage on my meter. I wanted charging voltage of 14.4 and maintenance voltage of 13.4. So I began turning the Philips adjustment screw and instantly the voltage jumped to 16.6 and would not dial back down no matter how much I tried. Within 10 minutes my batteries started to boil and vigorously gas. A 100 amps at 16.6 will permanently kill your batteries within a couple of hours. I switched it back to default and off of custom settings, but still it only had one voltage output, 16.6. Now the unit was no good for me. So I returned it and bought a IOTA DLS-90 Converter and Charger instead. The IOTA DLS-90 Converter and Charger with the IQ3, have been working flawlessly now for 4 months. It charges at 14.4 and maintains at 13.5. That's the default settings of the IQ4 and it didn't need any adjusting. Perfect. ... show more
Reviewed in the United States on September 3, 2020 by The Mad Inventor
Programming maintainer
Size: 100 Amp Style: Converter - PM4 12V
Programming battery maintainer , for the money this thing puts out crazy output ! , Solid with no ripple .
Reviewed in the United States on September 27, 2026 by kyle
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