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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.
Features:
Specs:
Alternate Instructions
California residents: click here
It was an easy install. Replacing a 7155. Took pictures of where the wires go before to help with install. I had to remove it from its metal case to install it, just 4 screws in the bottom to remove it. I took a pic of the old unit to show
The controller arrived two days after the order was placed. Packaging was excellent. Had it installed the day after it arrived. Directions were clear making the install very doable. Took about an hour and a half. The previous controller failed while we were travelling. The new one works perfectly. We can now use our small travel trailer with no worries. Progressive Dynamics produces quality products. Etrailer is very professional and effective. Highly recommend both of them.
When the charger on the original converter failed I wanted to replace it with a USA made converter. I am glad I did. The Progressive converter fit perfectly and is built much more solid. It has performed perfectly in the year we have been using it.
Brooke M.
2/13/2025
Im glad to hear you are so happy with this panel! Are you fixing up the RV for an upcoming trip?
Lasted about 10 months. Now the fans don't come on and the thermal switch shuts down the power. Mainly use shore power to keep batteries charged, trailer has been out once.
Had to replace my power converter on my 06 rage’n toy hauler. It was making noise and causing interference with the stereo system so I knew it was on its way out. This converter bolted right up and fit in place. Very little had to be modified or changed to make it work. Noises are now gone and converter works flawless!
Ansley J, did an outstanding job finding the proper converter I needed and placing my order. It arrived on time and it was very easy to install. I plugged in my RV and the converter started charging my lithium batteries. I highly recommend this converter and etrailer for outstanding customer service.
Warning! On recent (2021 and later) models of trailers this is not a drop-in replacement. The newer WFCO 8955s are no longer installed in a metal box, they are using molded plastic boxes now. The PD4655's box does not fit where the old converter electronics go. Since I do not want to replace the entire electrical panel I'm having to remove the PD4655's electronics from the metal box and figure out some way to safely mount it inside the plastic cavity.
Heather A.
10/10/2024
You are correct, the WFCO 8955 is in a molded plastic box. You will need to remove the new converter core assembly from provided enclosure, by removing (4) screws securing converter to enclosure and slide converter out. Discard the metal enclosure and screws as they are not used when replacing this model converter. Then you can replace the unit inside your original box.
Replaced 12 year old converter section of Parallax 7355 Power Center. Positive lead wire from PD converter to existing DC circuit board barely long enough. Had intended to use the PD DC circuit board that came with the converter, but didn't because the wiring of the Parallax board was quite different (i.e., PD board had screw-down attachment of positive circuit leads, whereas the Parallax had pigtails soldered to the board that came from a compartment in the rear of the power center (which I would have had to completely remove in order to see what was really going on)). PD's installation instructions were barely adequate (for example, installation of the new DC board was barely mentioned - and its installation instructions were included in the de-installation instructions for the Parallax converter!). The Phillip's heads on the 4 machine screws that came with the unit stripped out with just manual screwdriver effort.
Overall, though, it worked the first time I plugged in shore power, and also when I ran my generator. I will need to use it for a season to tell if it charges my new house batteries better than the old Parallax.
On the positive side, etrailer's web site was easy to use and the product came in its original, un-opened packaging in a timely fashion during the busy pre-Christmas season. I also like the amount of information etrailer provides on the products it distributes.
This is a very good product much better than the original converter
Jerramy 
2/15/2025
It works fantastic
Kate F.
2/17/2025
Retailer got my AC > DC converter out for next day shipping at the very end of the day and saved my trip
Best truck and RV store on the Internet
The converter matched up perfectly
Slipped right in and was very easy to install... definitely can't beat the price....way better than any other quote that I received
Brooke M.
5/9/2025
We mean business, that's for sure ;)
So far so good- installed in a 27 foot airstream. Screw holes on unit do not line up- nothing a sheet metal screw can’t fix.
e-trailer and the team is awesome! I highly recommend them! The product is exactly what I needed and I am impressed with the quality and ease (instructions included) to replace the old system.
Like usual, etrailer.com did an awesome job. My items always come quicker than what they say it will. That's why I always come back.
I love it. It absolutely fixed the problem. Seemed to be a fairly easy install for my friend. Delivery was fast. Thank you so much
Corinne
2/4/2025
Excellent. Still working just fine and I thank you so much!
Kate F.
2/4/2025
Super easy and fast to install, very good quality!
All happened just as we were told it would including, shipping, installation, function, and resolution. This truly helped us out while in the early stages of a two month trip. Hey have proven to be a great resource that I’ll make use of should we need to resolve a new issue.
Easy installation to replace our old blown converter! Awesome customer service! Delivery time as promised! Will definitely be using etrailer for all our rv needs!
Debbie
5/15/2024
Still working perfectly!
I have yet to install the unit but I must say Amy J is awesome. I had ordered the wrong item and Amy processed the return and the replacement purchase and instant shipping.
If only there were more folks like her.
Nice product easy to install
Overall, the unit works well. The included DC fuse board had fewer slots than the original board with the trailer and did not appear to be as robust. As a result, I left the original fuse board in place. The charger works very well to charge my lithium batteries. The fans are considerably quieter on this charge converter than the originally unit. I am pleased with how it has performed so far.
Even though the directions included with the Power Distribution Panel were for earlier versions of the one I was replacing, the directions were adequate to guide the installation. The Power Distribution Panel is working. I especially like the fact that there is a system test capability unlike the one being replaced.
Thanks, great service.
I'm mot installing this myself, I'm having it done. Mechanic was thrilled with the part. Confirmed it's the best one on the market, and has never had an issue with the ones he's installed.
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Condition: Like New
Notes: May have damaged packaging or minor cosmetic blemishes.
Info for this part was:
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Victoria H.
3/14/2025
That's a clever and convenient idea, Sean! Thanks for sharing your insight, I know it will be a helpful tip to someone installing this in the future.