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  1. RV Power Converter
  2. WFCO
  3. 55 Amps
  4. AGM
  5. Gel
  6. Lead Acid
  7. Lithium
WFCO Auto-Detect RV Converter Charger - Deck Mount - 12V - 55 Amp
WFCO

WFCO Auto-Detect RV Converter Charger - Deck Mount - 12V - 55 Amp

Part Number: WF38FR
$245.42
Retail:$362.49
You Save: $117.07
RV Power Converter
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If your batteries aren't charging like they should, a new converter charger may be the fix. This deck-mounted unit restores 12V power and automatically adjusts for lead-acid or lithium batteries without major rewiring. Great Prices for the best rv power converter from WFCO. WFCO Auto-Detect RV Converter Charger - Deck Mount - 12V - 55 Amp part number WF38FR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (4)
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WFCO RV Power Converter - WF38FR

  • 55 Amps
  • AGM
  • Gel
  • Lead Acid
  • Lithium
  • 12V
  • WFCO
  • Converter Only
  • Multi-Stage Charge
  • No Battery Mode Switch

If your batteries aren't charging like they should, a new converter charger may be the fix. This deck-mounted unit restores 12V power and automatically adjusts for lead-acid or lithium batteries without major rewiring.


Highlights

  • 55-Amp Deck-Mounted Converter Charger: A straightforward way to restore reliable DC power without replacing your panel.
  • Auto-Detect Lithium & Lead-Acid Charging: Automatically charges your batteries correctly with no switches or guesswork.
  • Multi-Stage Charging Support: Uses battery-specific charging to reduce wear and support longer service life.
  • Stable DC Power Output: Runs lights and 12V systems smoothly, even if a battery isn't connected.
  • Quiet, Thermostatic Cooling Fan: Fan runs only when needed, keeping noise down during everyday use.
  • Simple Deck-Mount Installation: Integrated 15-amp power cord makes installation easier and more familiar.

Features to Know About

Reliable Charging Without Replacing Your Power Center


converter charger with human

When lights start dimming or batteries stop charging like they used to, it's easy to assume the whole power center needs to be replaced. In many cases, it's really just the converter that's worn out. This deck-mounted converter charger lets you restore clean, reliable DC power without tearing into a distribution panel that's still doing its job. It's a straightforward fix that gets your RV's electrical system back on track.

Does This Converter Work With Lead Acid and Lithium Batteries?

Yes. WFCO's Auto-Detect technology automatically recognizes lead-acid or lithium batteries and applies the correct profile. Lead-acid batteries receive 3-stage charging with higher voltage during bulk charging, then step down to normal, and trickle/float stages as they recover. Lithium batteries follow a two-stage process designed for faster, more consistent charging. The result is quicker recharge times and less day-to-day strain on your batteries, helping them last longer and perform more reliably.

Stable DC Power With Built-In Protection

RV electrical systems see a lot of use, and small power issues can turn into bigger headaches when they affect lights, control boards, or entertainment systems. This converter delivers stable DC power whether or not a battery is connected, helping keep sensitive electronics running smoothly. Built-in protections guard against over-current, over-temperature, over-voltage, and reverse polarity conditions, so wiring mistakes or sudden load changes don't cause damage.

What Makes This Converter a Practical Replacement


Converter with cord

Converter replacements don't always happen in wide-open compartments with perfect mounting surfaces. This deck-mounted converter is built to be flexible, so it can be installed horizontally, vertically, or even upside down depending on the space you're working with. The integrated 15-amp AC power cord keeps wiring straightforward, and the vented housing allows proper airflow in multiple mounting orientations. Insulated connections help protect wiring during installation and long-term use. It's a practical fit when your existing distribution panel is still in good shape and you just need a reliable converter charger to keep your RV's 12V systems running. If you'd like help with the install, you can use etrailer's installer locator to find a qualified shop near you.

Specs:

Dimensions & Weight:

  • Overall dimensions: 4-3/4" wide x 8-3/4" long x 4" tall
  • Weight: 5.5 lbs

Converter & Charging:

  • Battery compatibility: lead-acid (flooded, AGM) and lithium
  • Charging control: automatic battery type detection
  • Output current:
    • Lead-acid: 55 amps
    • Lithium: 50 amps
  • Output power: 940 watts
  • DC voltage range:
    • Lead-acid: 13.2V to 14.4V DC
    • Lithium: 13.6V to 14.6V DC
  • Charging stages:
    • Lead-acid: 3-stage charging
    • Lithium: 2-stage charging

AC Input:

  • Input voltage: 105V to 130V AC, 60 Hz
  • AC connection: integrated 15-amp power cord

Safety & Protection:

  • Over-current protection
  • Over-temperature protection
  • Over-voltage protection
  • Reverse-polarity protection
  • Short circuit protection
  • Integrated cooling system

Certifications & Compliance:

  • UL and cUL certified
  • FCC Class B compliant

Warranty:

  • 2-Years from date of purchase


WF-9855-AD-CB WFCO Technologies Auto-Detect Battery Converter Charger - Deck Mount - 12 Volts - 55 Amps

Installation Details WF38FR Installation instructions


California residents: click here


Video of WFCO Auto-Detect RV Converter Charger - Deck Mount - 12V - 55 Amp

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of WFCO RV Power Converter - Converter Only - WF38FR

Hello, everybody, this is Jeff at etrailer. Today we're gonna take a look at this WFCO 12-volt Deck Mount Auto-Detect RV Converter Charger. Now this converter is gonna keep your RV power smooth and steady, and it even adjusts itself to whatever battery you're using. It'll stay quiet, protects your system from electrical hiccups, and it won't interfere with your electronics. It does offer an auto-detect technology, which will recognize your battery's chemistry and it will automatically adjust the charging profile to match. So if you have a lead-acid battery, it uses a three-stage converter, which will handle every charging need for the RV.

And if it has a lithium battery, it uses a multi-stage process to ensure safe operating voltage replaces the battery energy and balances your battery cells. This converter charger provides nice, clean, reliable DC power that powers electronics and appliances, delivers clean power with or without a battery. Now on this unit here, the maximum power input is 940 watts, continuous power output of 750 watts, and the output DC current is 55 amps. This is a deck mount installation. As you can see, it comes with this integrated three-foot long 15-amp AC power cord.

Now vertical mounting on this will provide nice, unobstructed ventilation for the fan right back here and the vent holes right up here. They use fully insulated connections for protection and it is an open-top design for ease of use and effortless installation. Now this will protect against over current, over temperature, over voltage and reverse polarity. The cooling fan, which we mentioned, right back here, this cooling fan will run only when needed for quiet operation. It'll be controlled by the current load attached to the converter, not by the temperature.

Now we do also sell a distribution center, which is sold separate on our website, which is ideal to pair with this converter. Now this unit does meet the FCC Class B compliance, which means the converter won't cause interference with TVs, radios, or other signals. Just to give you a few dimensions on this, the overall length, one end to the other, is 8 3/4-inches. Width is 4 3/4-inches wide. And the height, four-inches tall.

Now if you do have any other additional questions regarding this part or any other item that we carry, please feel free to reach out to us so we can help get all your questions answered for you. But that's gonna do it for our look at this WFCO 12-volt Deck Mount Auto-Detect RV Converter Charger.

Customer Satisfaction Score:

Ratings & Reviews

5.0

4 reviews
If your batteries aren't charging like they should, a new converter charger may be the fix. This deck-mounted unit restores 12V power and automatically adjusts for lead-acid or lithium batteries without major rewiring.

by:

Works great



by:

Very quick delivery and easy install and works perfectly. Happy



by:

Exactly as ordered. Works perfectly and fast shipping.



by:

installing on 2 Jan 2026 for a lifepo


4
4

See what our Experts say about this WFCO RV Power Converter

  • Looking To Replace My Current WFCO Converter, What Do You Recommend?
    Hey Jim, It is hard to say which is better since both options are great. The WFCO # WF38FR is fairly newer to us so our experience is not as full like it is with the Progressive Dynamics # PD79RR. The Progressive Dynamics Converter is something I have seen more popular and experienced more. In my opinion I would recommend the Progressive Dynamics for your setup. Although both would work well, I will have to recommend what I know works well. What kind of camper are you wanting to install...
    view full answer...

Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Mary K
Written by:
Mary K
Employee Alexander C
Updated by:
Alexander C
Employee Daron K
Updated by:
Daron K
Employee Dawn Z
Updated by:
Dawn Z
Employee Amanda M
Edited by:
Amanda M

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