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Progressive Dynamics Replacement Section for AC/DC Power Distribution Panel - 55 Amp
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Progressive Dynamics

Progressive Dynamics Replacement Section for AC/DC Power Distribution Panel - 55 Amp

Part Number: PD4655V
272 Reviews | 136 Questions
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progressive dynamics accessories and parts power converter replacement section for ac/dc distribution panel - 55 amp
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Upgrades or replaces the converter section for 55-amp Parallax/Magnetek, WFCO, or Parallax RV power centers. Works with Parallax/Magnetek model 6355, WFCO model 8955, and Parallax models 7355, 7155, and 8355. 1-800-940-8924 to order Progressive Dynamics accessories and parts part number PD4655V or order online at etrailer.com. Free expert support on all Progressive Dynamics products. Great prices and Fastest Shipping for Progressive Dynamics Replacement Section for AC/DC Power Distribution Panel - 55 Amp. Accessories and Parts reviews from real customers.
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Progressive Dynamics Accessories and Parts - PD4655V

  • Power Converter
  • Converter Section
  • Progressive Dynamics
  • 55 Amp

Upgrades or replaces the converter section for 55-amp Parallax/Magnetek, WFCO, or Parallax RV power centers. Works with Parallax/Magnetek model 6355, WFCO model 8955, and Parallax models 7355, 7155, and 8355.


Features:

  • Upgrades or replaces the converter section for 55-amp Parallax/Magnetek, WFCO, or Parallax RV power centers
    • Works with Parallax/Magnetek model 6355, WFCO 8955, and Parallax models 7355, 7155, and 8355
  • Power converter with smart charger converts AC shore power to DC power to quickly charge your RV batteries
    • Provides continuous power to your DC breaker panel to run 12V loads
    • Works with flooded lead acid, AGM, Lithium, and gel batteries
  • Integrated Charge Wizard monitors your RV's batteries and automatically begins charging when needed
  • Automatic multistage charging switches modes as the battery charges and helps extend battery life
    • Boost mode charges at the full rated load for a quicker recharge time
    • Normal mode provides controlled voltage to ensure a full charge
    • Storage mode maintains a lower voltage to compensate for self-discharge which reduces battery stress
    • Equalization mode activates to prevent stratification and sulfate buildup during extended storage cycles
  • Built-in safety features protect your RV's electrical system
    • Current protection for reverse polarity, overheating, overloading, short circuiting, and over/under voltage
    • Cooling fan controls the temperature of the converter and removes excess heat generated by the unit
    • GFCI protection helps prevent ground fault interruption
  • Made in the USA


Specs:

  • Application: 12V battery systems
  • Rated power output: 740 watts
  • Amperage output: 55 amps
  • Voltage:
    • Input: 105 - 130 VAC
    • Output (no load): 13.6 VDC
    • Output (full load): > 12.6 VDC
  • Temperature ranges:
    • Operating range: 32 F to 122 F
    • Storage range: -4 F to 176 F
  • Dimensions: 13-1/4" long x 8" deep x 5-3/8" wide
  • Weight: 10 lbs
  • 2-Year limited warranty


PD4655V Progressive Dynamics Replacement Section for AC/DC Power Distribution Panel - 55 Amp

Parallax/Magnetek model 6355

Parallax model 7355

Parallax model 7155

WFCO model 8955

Installation Details PD4655V Installation instructionsAlternate Instructions PD4655V Installation instructions





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Ratings & Reviews

4.7

272 reviews
5 Stars
(218)
4 Stars
(36)
3 Stars
(6)
2 Stars
(4)
1 Star
(8)
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by:
PD4655V, easy install. I can now charge my new lifepo4 battery. Etrailer was very helpful when contacted for a question. Highly recommend for updating your charging system for lithium battery. Don't forget to move the jumper on the control board to LI, for Lithium battery.
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Mike L. profile picture
Etrailer Expert

Mike L.

9/10/2026

Thank you, glad to hear your converter is working well for you!

Bigfoot profile picture

Bigfoot

9/10/2026

Please, disregard the pic on the left, as it is the old dc fuse board that got replaced . Thanks
by:
Hoping that the Progressive Dynamics converter will be a quality unit as the original WFCO was shortlived and the Powermax made it 4 years. The PD has dual fans compared to the others 1 fan for cooling. Installation in a wfco box is a bit challenging. 90 degree bends on the heavy gauge wires, had to run wire over the switch for battery type,and the cheap plastic wfco tabs that hold the fuse board break off easily. I originally rewired the new PD fuse panel from the bottom starting at #1 fuse but fuse #1,2 are offset to the left and low thus partially blocked by the cover making fuse changes near impossible. I only needed 10 circuits so I should have started wiring at #12 down to #2. Or maybe trim the plastic cover. There are 2 mounting holes in the PD fuse panel but they don't align with anything in my wfco box. The converter assembly fit perfectly. So far my 12v fuse panel is secured by the cover until I can configure a more secure mount. I turned on every light in the RV and barely heard some fan noise from the PD converter. Lead battery is charged at 13.16 volts and holding. I'd consider this easy but I've worked maintenance before.
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Kate F. profile picture
Etrailer Expert

Kate F.

4/23/2026

Sounds like you really put that install through its paces Randy! We’re hoping the Progressive Dynamics unit treats you better than the last two, and it’s great to hear it’s already running quiet and holding a steady charge. That dual fan setup seems to be doing its job. You also called out some very real challenges with fitting it into the WFCO box. Tight wire bends, fragile tabs, and misaligned mounting points can definitely turn a simple swap into a bit of a puzzle. Your notes about fuse positioning and wiring order are especially helpful for anyone tackling the same setup. Glad to hear you got it up and running, even if it took a little creativity along the way. Appreciate you sharing all the details.

by:
Received and Installed about a year ago and is working well. Appears to be well designed and easy to install. Took me about a hour and half to complete the installation and double check the wiring connection. The replacement has kept the battery in good shape and not overcharged. The service by E-Trailer staff helped make the installation easier while traveling on the road in my trailer. Found the Controller a good buy.
by:
So happy with etrailer!! We were in a bind and Lillian helped us from start to finish. We shorted our inverter and we had no electricity, no hot water, no fans, no refrigerator/freezer in our Airstream. . Not only did etrailer have the replacement part but they were open on Sunday. Lillian expedited our order and we had it in our hands. - in Hawaii - in five days. Part was installed works perfectly, and we are continued fans of etrailer.
by:
Order arrived on time, installation was straightforward, and best of all…it worked!

I appreciate the flashing status light, which shows that the unit is powered on and indicates the current battery charging mode. The unit also has a red blown-fuse indicator for each circuit, providing a quick visual indication if there is a problem.

Overall, I’m very pleased with the unit and the ease of installation.
by:
Looks fantastic and think this is a great upgrade to the original system that came in my trailer.
Only 4 stars because though it’s listed as a direct replacement the included circuit board is not 100% compatible to my trailer leaving off one significant wire for the battery disconnect.
by:
The converter unit arrived promptly and installation took about an hour following the online directions carefully. The tabs that held the other circuit board broke when I removed it, but was able to use a screw to attach new circuit board to a standoff where old board was. The new board had a hole in it that lined up perfectly with standoff. I’m now able to use 12v compressor fridge in camper while driving using Lifpo battery and battery charges quickly when plugged into 120v.
by:
I swapped out a Parallax 7155 unit from a 2017 Casita Spirit Deluxe and replaced it with this Progressive Dynamics PD4655V. The swap required removing two screws from the base of the old unit and I was able to slide it out of its plastic retainer tray. I removed the new Power Converter from its enclosure and was able to slide the new unit into the tray of the old unit. I was only able to use 1 of the 2 locking screws during reassembly. The unit is still very secure in the rack.

I used the new fuse board and replaced my old one. I had some trouble with a few wires reaching but managed to make it work.

After about 3 hours of work, I fired it up and saw it was charging my battery. After another 2 hours, I saw the voltage step down to a float charge and can see the 4 stage charger in action. Looks to be a solid product and I look forward to better battery life.

Thank you,
Mario
by:
The converter works great! Exactly what I needed to get the Airstream electrical back to working properly!! A big thanks to Matt and the team!
by:
Very solid unit. Converter installation was straightforward. I couldn’t find anything on wiring for curcuit smart board after the battery and converter wires. Nothing on the 12 bottom lugs. There are 12 lugs and I had 9 wires. I went off the one pic in manual. It worked. I probably missed in the install instructions
by:
Easy install and charging AGM no problem. Installation took 40mins and that’s with with going meticulously slow when swapping wires over one at a time so I didn’t have to relabel everything. Have needed to replace the old converter for awhile now, wish I knew how uncomplicated the swap was sooner.
Communication from e-trailer was a series of stays updates and a check in after it was delivered. I really appreciated this. Last note, not necessarily all due to e-trailer, the package arrived two days earlier than expected. So good on USPS but also for e-trailer getting my package sent off within a day of clicking buy.
by:
This unit does not replace WFCO 8955 AD. The unit is too large. If you want to convert WFCO to lithium, Progressive Dynamics does not have an option despite what their description says. You will need WFCO 8955 AD MBA.
by:
Charges my lithium battery fast. Bms shuts off charge when it gets too 100 percent.
by:
I installed in my 2021 Winnebago Hike 171DB as part of Li battery conversion. Was able to complete in under an hour. Read directions and locate the wires first is my advice. Must take off outer metal case, then fits perfectly. Plugged in to shore power and trailer did not blow up. So far so good.
by:
It was an easy replacement for my other converter and performs exactly as advertised.
by:
Paid extra for fast shipping, and there was a problem on the shipping end. They did immediately ship again, once I brought it to their attention; however I was not offered the additional $10 back. The part itself works and was easy enough to install. Time will tell if it lasts.
by:
I watched all videos I could find before attempting this job. After finishing I plug into 110 volt outlet my lithium battery was at 25% charge ( I had relocated the white cap over the lithium indicator as directed in video) my battery is blue tooth the green indicator light on the distribution panel was on no blinking. Battery showed 13.5 volts charging amps at 6.The battery is a 300ah showed that rate the 55 amp charger would take 94 hrs does this sound right?
Lazer S. profile picture
Etrailer Expert

Lazer S.

11/18/2025

Hi John! It sounds like you may need to switch the converter to Lithium mode. You should be seeing around 14.2 to 14.6 volts to actually charge the battery. The 13.5 would really only maintain the battery. Check out the link I have included as it will show the switch. What brand and model did you replace?

Helpful Links

question-792343.html

by:
Does what it says. Instructions didn't include a few details but overall a great product.
by:
Install was straight forward, with good instructions. Charged batteries properly, e-trailer was great to deal with as they have been for all my purchase's.
by:
Quick changeout, instructions took a bit to figure out the swap out but was a good fit once I figured it out.
by:
Charged my 300 aH LiPO4 battery like a champ and then appropriately dropped to trickle charge levels. Very satisfied.
by:
I bought this so that I could charge a lithium battery instead of lead acid. Several years ago, I bought a PD4655 as an upgrade from a WFCO-8955PEC and it worked well, so I am hoping for the same result this time (although I wish there was just a simple upgrade fix as the parts are very similar between PD4655 and PD4655V, or at least a recycle option). The metal case has to be removed (4 small screws; likewise would be cool if there was a recycle option as I don't have a use for the case). You also have to move the jumper to the lithium side instead of the wizard side on the motherboard, but that's a simple lift and move of the jumper to one pin over. Just received today and look forward to a relatively straightforward install this weekend. Received a day earlier than expected, so happy with that too.
by:
Easy to install and configure for lithium batteries. Only drawback is that the fuse board is difficult to snap into place and doesn't hold well.
by:
This was a direct replacement for the panel which came with the airstream but had the added feature of allowing me to charge Lithium Battery.
by:
good product, poor installation manual on line
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Employee Mike L
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Mike L
Employee Jameson C
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Employee Adam R
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Employee Cole B
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Employee Andy C
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