Product Experts Available Now!
Call 1-800-940-8924
WFCO Auto-Detect RV Converter Charger - Deck Mount - 12V - 100 Amp
(87 reviews)
Price: $519.99
In Stock
WFCO
WFCO Auto-Detect RV Converter Charger - Deck Mount - 12V - 100 Amp
Part Number: WF56FR
In Stock
$519.99
Retail:$691.99
You Save: $172.00
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.
Need help with installation?
Locate installers near me- All Info
- Reviews (87)
- Q & A (0)
- Photos
WFCO Power Converter - WF56FR
- 100 Amps
- AGM
- Gel
- Lead Acid
- Lithium
- 12V
- Converter Only
- WFCO
- AC to DC
- RV
- Automatic Switch
- Multi-Stage Charge
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
- 100-Amp Deck-Mounted Converter Charger: High-output solution for restoring reliable DC power without replacing your panel.
- Auto-Detect Lithium & Lead-Acid Charging: Automatically applies the correct charging stages with no switches or guesswork.
- More Efficient Power for High-Demand RVs: Draws incoming power more efficiently to reduce generator strain and wasted energy.
- 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 20-amp power cord makes installation easier and more familiar.
Features to Know About
Reliable Charging Without Replacing Your Power Center
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.
More Efficient Power for High-Demand RVs
When you're running a large RV, toy hauler, or long-stay setup, inefficient power conversion can waste energy, strain generators, and create excess heat. This converter uses Power Factor Correction to draw incoming AC power more efficiently, reducing wasted energy while delivering up to 100 amps of stable 12V DC output. That means less load on shore power or your generator and reliable performance for larger battery banks. It's a practical way to support demanding RV setups without working your electrical system harder than it needs to.
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. Three onboard LED indicators make it easy to check system status at a glance, letting you know when everything is operating normally or if there's an issue that needs attention.
What Makes This Converter a Practical Replacement
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 20-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: 9-3/4" wide x 13-1/2" long x 3-3/4" tall
- Weight: 10.25 lbs
Converter & Charging:
- Battery compatibility: lead-acid (flooded, AGM) and lithium
- Charging control: automatic battery type detection
- Output current: 100 amps
- Output power: 1710 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 20-amp power cord
Safety & Protection:
- Over-current protection
- Over-temperature protection
- Over-voltage protection
- Short circuit protection
- Reverse-polarity protection
- Integrated cooling system
Certifications & Compliance:
- UL and cUL certified
- FCC Class B compliant
Warranty:
- 2-Years from date of purchase
WF-68100AD WFCO Technologies Auto-Detect Battery Converter Charger with Power Factor Correction - Deck Mount - 12 Volts - 100 Amps
Installation Details
Ratings & Reviews
4.9
87 reviews
by:
Efrain
08/20/2026
fans run surprisingly cool. I have a 660ah battery bank and I can run a 12volt AC at max all day and my batteries are at 100%. You can hear the charge kick in every once in a while and top off the batteries. I'm very happy with this purchase.
by:
R Wayne
04/22/2026
I needed to replace the converter on my RV to switch to lithium batteries. I originally tried to save some Pennie’s by purchasing a cheaper brand on Amazon, big mistake. I should have known spending a little more money and getting service and advice from E-Trailer would save me time and money in the long run. The unit worked immediately and flawlessly so far.
by:
Michael
06/10/2026
The converter is working great. I would highly recomend for fast charging. I am using it with 4, 100ah Li batteries.
by:
Brian
06/16/2026
Thank you for getting my order out in a timely manner!
by:
David
09/11/2026
Awesome delivery and response. Great product and good price.
by:
Gordon
04/17/2026
by:
John
09/10/2026
Fair price with free shipping on genuine WFCO 75Amp RV converter. Direct replacement for the WFCO 65Amp originally in RV.
by:
Gene W.
06/02/2026
I recently upgraded to the WFCO 9855AD. It was very easy to swap the old for the new and I have had no issues with it. I know that there are some who have issues with the auto detect function, but there is a very good video on YouTube put out by the National RV Training Academy that explains how it works and how to set it up. There are no switches or jumpers that need to be set, you just need to make sure that the Lithium battery is below 50% charged so that the unit will go thru a complete charging cycle. Highly recommend watching the video.
The only concern I had in ordering this was the photo on the web site showed that this came with a different type of plug than the standard residential three prong. After talking with Ashley E. in customer service, I did order it and am happy to say that it does have the standard three prong plug.
The only concern I had in ordering this was the photo on the web site showed that this came with a different type of plug than the standard residential three prong. After talking with Ashley E. in customer service, I did order it and am happy to say that it does have the standard three prong plug.
by:
Michael
07/02/2026
Replacing a deck mount converter charger is extremely straightforward. I replaced our non-lithium converter charger with this one that supports lithium and is also auto detect. Like most RV's, our converter charger is in a location behind the power distribution panel so you have to remove that entire panel to get to it. Makes absolutely no sense but remember, we're talking about RV engineers. This is what makes the auto detect extremely nice to have. Once you have access it's just a matter of removing the old converter charger and wiring up the new one the exact same way. If you're like me and are overly cautious, before removing the old converter charger just whip out the cell phone and take a picture of the wiring. Before you button everything back up I would plug the RV into shorepower and make sure the converter charger is charging. It would suck to put everything back together just to find out it was not charging. Other than those few things, like I said, it's an extremely easy replacement.
by:
Mark
09/07/2026
I ordered this unit to carry in my camper for back up. I replaced the last one about 5 yrs ago. They a have a lifespan it seems, and want to have a reliable replacement on hand for our extended upcoming trip.
by:
Kevin
10/07/2026
Unit was received quickly. I have not installed yet due to finding out that the converter was not my issue. I am going to hang unto it as The One In my RV is 6 years old. And will eventually die out, and my icebox is 12vdc and I live full time in it. I think having a spare on hand is wise.
by:
Richard
08/05/2026
I am going to switch my batteries from lead acid to lithium. This converter should be an updated version to be compatible with lithium battery detection. Looks like an easy switch I can do myself. Easy order process and prompt delivery. Thanks.
by:
Larry
04/28/2026
I purchase the new auto-detect converter charger so that I could upgrade my battery on my rv to a lithium battery. As promised it was a simple disconnect 3 wires remove the old converter and install the new converter and reconnect the 3 wires. I was told that I would receive the converter on Monday, but it showed up on Saturday, two days early. Thanks e-
trailer for the great advice on the converter and getting it to me quickly.
trailer for the great advice on the converter and getting it to me quickly.
by:
JP
09/14/2026
Product was easy to install and all of my 12V load started working properly immediately.
by:
Ricky
05/06/2026
The purchasing process was very easy and easy to track the shipping. Kind of cool how you guys post pics of the staff handling each phase of the process. I purchased this converter as a spare as im guessing mine will fail soon enough since the cooling fan no longer works. In the mean time I have the comfort of knowing I have one on the shelf if mine fails.
by:
John
07/01/2026
Great site selling authentic parts! Bought this unit after being ripped off by A**zon sending me a Chinese knock off after I paid for this exact OEM part and was sent a cheap copy for $333.00 ! Etrailer sent me the correct part fast for the same price. You guys have gained a customer for life.
by:
Zjon
07/09/2026
So far, so good. Quieter than the factory converter and easy to install. I like that it can be used with Lithium batteries too.
by:
Darrell
08/13/2026
Exact same item, exact same fitment.
Emily the rep made sure I got the correct item, shipped quickly. Made for a quick simple replacement.
Emily the rep made sure I got the correct item, shipped quickly. Made for a quick simple replacement.
by:
Carl
08/27/2026
Got it, intalled seems to work just as it should. Thanks for rapid shipping.
by:
Adam
09/16/2026
Installed inverter and works as intended.
by:
Cheryl
10/18/2026
this was a match when I did a Google search. for my converter on my horse trailer. My first order was lost in the mail and did not come till five days late, so I had already placed a second order to be shipped differently and it arrived promptly. Customer service was great working with me to get the new order out and I am in the process of returning the delayed order. This was easy to install since it was a match and is working great!
by:
Rick
07/07/2026
Brielle understood my needs perfectly and helped me look for an upgrade, this is the best one available. She was great, installation was simple, works great.
Rick
Rick
by:
Tina from Lake Placid FL
02/02/2026
This one started right up and is working as expected. However, this is the third WFCO Auto-Detect 55AMP in a coach that is only 4 years old. Each time it stops recognizing that we have lithium batteries and stays at a charge rate of 13.4 instead of 14.6 volts. We continue to purchase this unit because it is the only unit that will fit in the space that Airstream 30 Classic gave us. Keep your fingers crossed on how long it works. It never died; it stopped charging the lithium batteries correctly. It is easy to install, two wires, a ground wire and plug in behind the electrical panel.
by:
Schapps
07/07/2026
Direct replacement of non auto detect unit with a cooling fan failure. Works as it should. Fast delivery!
by:
Tim
06/07/2026
Product came quickly and packaged well. item was a drop in replacement for original equipment.
25
87
true
Show More Reviews
See what our Experts say about this WFCO Power Converter
- Can I Upgrade 45A Converter Charger To 55A Without Hurting My RV's Electrical System?Hey Taylor! We get questions like this all the time. Moving from 45A to 55A - like stepping from the # WF58FR (45A) to the # WF38FR (55A) - is usually fine, but this is where wire size starts to matter. If you’re upgrading to 55 amps, you’ll want to make sure the battery cables running from the converter to the batteries are 6-gauge or thicker. Eight-gauge wiring is generally considered safe up to about 50 amps, so once you move beyond that, 6-gauge is the safer and more appropriate choice...
view full answer... - Can The WFCO WF56FR 100A Converter Charge A Large Lithium Bank Fast With Generator?Good afternoon Rob. Yes, that’s exactly where the 100A WFCO Converter # WF56FR shines. In lithium mode, it boosts to 14.6V DC and allows maximum current flow during Charge Mode. That means shorter generator runtime - which is ideal with your new generator. Just keep in mind: -It requires a 20A AC circuit from the shore power to the converter/charger -It benefits from short, heavy-gauge DC wiring no smaller than 3 gauge from charger to battery -Solar running simultaneously can compete...
view full answer... - Will the WFCO 100A Converter Plug Into My Camper, Or Do I Need a Special Outlet Or Upgrades?Good question, Matt - and this is where a lot of people mix up AC shore rating with converter rating. The WFCO 100a converter # WF56FR is rated at 100 amps on the 12V DC output side going to your batteries and loads, not on the 120V AC input side. On the AC side, it uses a 20-amp plug, so what matters is whether your RV has a properly protected 20-amp branch circuit available - not whether your camper is 30A or 50A overall. In many 30-amp RVs, the converter is already on its own 15A or...
view full answer... - Will 100 Amp WFCO Converter Charge Be Good For 400AH Lithium Battery Bank In Fifth Wheel Camper?Good morning Rob, that’s actually where the # WF56FR ( WF-68100-AD) 100A RV converter charger makes the most sense. With a 400Ah lithium bank, you can actually utilize the higher output during the lithium charge mode, which boosts to 14.6V for up to 1–4 hours depending on battery state Just make sure: -You have a 20A AC circuit available (some travel trailers use 15A which would need to be upgraded to 20A) -Your DC wiring is 3 gauge or thicker (from charger to battery) -The run from...
view full answer... - Can I Use WFCO Converter Charger In My DIY Cargo Trailer Camper To Charge Batteries And Run DC StuffHey Kyle - yes, you can absolutely use any of these three WFCO standalone converters alongside solar: 45A # WF58FR 55A # WF38FR 100A # WF56FR They all connect directly to the battery bank, just like your solar charge controller does. The two systems can coexist without hurting anything. The only thing you might notice is that if solar is actively charging and keeping the batteries near full, the converter may not enter its high-amperage bulk/charge mode. That’s not a problem - it...
view full answer... - Recommended Deck Mount 100 Amp Hour Auto-Detect Converter ChargerIt sure will Jay. The deck mounted WFCO Auto-Detect RV Converter Charger item # WF56FR will indeed be a good replacement for the one inside of your Progressive Dynamics 4500 Series power center. It is compatible with lead acid and lithium batteries so it will work great with your current setup and when you upgrade to a 300AH lithium battery. The WFCO Auto-Detect RV Converter Charger item # WF56FR has an auto detect feature that switches between 3-stage lead-acid and 2-stage lithium-ion...
view full answer... - Why Won't WFCO Converter Charger Go Into Bulk Mode For Lithium Batteries?Hey there Josh, sorry about the issue you're having. WFCO Auto-Detect converters like 45A # WF58FR or 100A # WF56FR monitor charge cycles and battery behavior before selecting a profile. The lithium charge mode boosts to 14.6V in Charge Mode and can stay there 1–4 hours depending on load and battery state. But things that can prevent bulk mode from triggering include: -High DC loads during charging -Solar charging is active -Voltage drop from long or undersized battery wiring If you're...
view full answer... - Upgrading Progressive Dynamics PD9260 Converter Charger To WFCO Auto-Detect For LithiumGood question, Alan. The Progressive Dynamics PD9260 is a 60-amp standalone converter, and you’re in that mid-to-upper output range. If you want something similar but with WFCO’s Auto-Detect lithium feature, the closest match would be the # WF38FR 55A. It’s slightly lower output than 60A, but in most 30-amp travel trailers that difference isn’t noticeable. If you're also expanded your battery bank or want even more charging capacity for generator runs, the # WF56FR 100A becomes an...
view full answer... - Will a 100-Amp Converter Keep My Lithium Battery Charged While Running a 12V AC?Hey Lauren, thanks for reaching out. Yes, the WFCO Auto-Detect RV Converter Charger # WF56FR makes a lot more sense for what you are trying to do. Your existing 30-amp converter simply cannot keep up with a 12V air conditioner plus the refrigerator and other DC loads, so the battery makes up the difference even while you are plugged into shore power. The # WF56FR can supply up to 100 amps of 12V DC output and automatically switches to the proper lithium charging profile, including up to...
view full answer... - Can I Use WFCO 100A Converter On A Small Camper With 30A Shore Power Hookup?Hey Melissa - great question. The WFCO # WF56FR (WF-68100-AD) is rated at 100 amps on the 12V DC output side, not on the 120V AC shore power side. So it won’t “turn your RV into 100 amps.” On the AC side, this model uses a 20-amp plug and should be on a properly protected 20-amp branch circuit. Many 30-amp RVs have a 15-amp circuit feeding the electrical outlets, so the important thing is to check the breaker that currently powers your converter - not the main 30-amp shore cord. If your...
view full answer... - Which Converter Will Charge Batteries And Power Electronics In DIY Off-Grid Camper Build Hey there Ryan, since these are standalone deck-mount converters, they’re actually perfect for a cargo trailer build where you’re using a simple DC fuse block instead of a full power center which usually has a built-in converter. - # WF58FR 45A is great for light-duty builds - LED lights, fan, small fridge. - # WF38FR 55A works well if you’ve got two batteries or expect moderate loads. - # WF56FR 100A is more for large lithium banks or heavier off-grid use. The choice really comes down...
view full answer... - Upgrading Camper's Standalone Converter From 45A To 55A Or 100A - Keystone Travel Trailer W/Lithium Hello Eric, in a single-axle Keystone with 30-amp shore power, jumping from 45A to the # WF38FR 55A converter is usually a nice ugprade. It gives you stronger charging without introducing the wiring and AC circuit considerations that come with a 100-amp converter (100-amp requires 20A instead of 15A electrical outlets, breakers, wiring etc.). The # WF56FR 100A is excellent - especially for big lithium banks - but it really shines in larger RVs where you’re trying to push a lot of current...
view full answer...
Do you have a question about this Power Converter?
Info for this part was:
Installed by:
Jeff D
Written by:
Mary K
Updated by:
Alexander C
Updated by:
Daron K
Updated by:
Dawn Z
Edited by:
Amanda M
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Gwendolyn Y.
4/23/2026
Thanks for sharing your experience! Glad to hear everything is working smoothly with your new setup. Making the switch to lithium is a big upgrade, and it’s great that the converter performed right out of the box. We appreciate you giving us a shot and are always here if you need anything down the road!