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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
Purchased this unit and it was a lifesaver. My camper was fuses and was overcharging the battery which killed two batteries. Figured the unit in my camper was bad so ordered one from here. Delivery was fast and came with detailed instructions. Took less than an hour to replace the whole unit. Plug camper in turned everything on and all is well. Will definitely come here again for any of my RV needs
The PD product replaced the original Airstream (20 yrs old) Converter/charger. Install was fairly easy except the old 12 wires sizes did not fit into the new PCB clamps without a lot of force. Also, delivery was a day late even though I paid for rapid service (I live in downeast Maine - nothing comes on time). Powered up and it worked first try. Happy with PD's product!
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
Perfect replacement. Now my batteries c harge!
Jim 
8/26/2025
excellent. I dont even think about it, so that must mean it is working flawless. We were on our winter 5 month trip using it every day.
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?
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.
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 ;)
Product worked great, no issues. Fast and easy installation.
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.
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.
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.
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!
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.
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.
Fast and free delivery and good price
Randall
8/23/2025
this power center works very well after a year. It is very quiet in all phases of operation and since I installed it, and know a bit about electronics, it is a well built product
Retailer got my AC > DC converter out for next day shipping at the very end of the day and saved my trip
This is a very good product much better than the original converter
Jerramy
2/15/2025
It works fantastic
Kate F.
2/17/2025
Best truck and RV store on the Internet
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.
Greetings,
I would like to thank Joshua B, George J, Noah P, and the USPS for prompt processing and arriving a day earlier than the ETA.
The product ordered, listed above, was a perfect retro fit.
Once installed and powered up, all systems are back in function.
My only suggestion: in product description would be product dimensions.
Thank you for your help!
worked out great easy to install
RV tech was here today, installed the unit, everything working perfect again. Thanks
I would like to thank etrailer.com for my RV converter. It was very easy to find on their web page had all the information I needed to order it and install it.The directions were easy to figure out and had it in and running in about an hour
Thank you
Etrailer had the recommended replacement power inverter for my RV which fit exactly as stated. Directions were easy to follow and installed in an hour and a half.
Gregory
7/11/2024
Worked exactly as it should once installed. No problems to date. Would recommend this to anyone.
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Condition: Missing Parts
Notes: Top tab is a little flexed or bent, also missing 4 screws, otherwise like new
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.