Powermax 110 Volt to 12 Volt DC Power Supply Converter Charger for Rv Pm3-55 (55 Amp)

Installation was straight forward and product works as intended I’ll try and fallow up before the end of summer Works fine on my keystone raptor 3612 the old converter was not allowing batteries to charge from generator

The PowerMax PM3-55 worked well on the bench and charged my new AGM batteries. I like the fact that the voltage is adjustable. There is a tiny switch that lets you adjust a fixed voltage (set with a small trimpot next to the switch). Important note: The adjustment affects the voltages on either setting of the switch (including the normal setting which affects the voltages during the 3 stages of charging; Bulk, Absorption, and Float), but either way the adjustability is a plus ! The unit did not quite fit (as an exact replacement for the WF-8955 Converter/Charger) in my sons RV (very close though, and probably could have made it work with slight modification). Since this was intended as an upgrade (and the original was still working), we decided to leave well enough alone and leave the original in place. In any case, Im sure I will be able to make use of it as a nice charger for my car batteries when needed.

Took a minute to delete a power change switch. (Deleted switch).

As advertise easy to install packaging was good quickly got here and it’s been running ever since two months no issues

perfect for DIY! easy install, all contact points labeled. works great.

Installed the converter in June of 2021, stopped working in September 2022. Luckily I was on a local camping trip where I could return home and pick up a battery charger and return to the campground and charge my batteries up enough to get the landing gear retracted. When I got home I did some troubleshooting and tried to find warranty information on Amazon and couldn’t find any so the top of the converter came off and I discovered a blown fuse on the circuit board that was soldered in. Bypassing the fuse with some alligator clips resulted in a blown capacitor. So it buying a new converter for me. Not happy with this one only lasting 15 months. Lucky it happened to me on a local trip and not my wife on one of her boon docking horse camp outs. When it worked it was great but reliability is very poor.

Old one wouldnt charge battery below 40. This one does the job, no issues. Happy with product.

It was very easy to install

This was exactly what I needed. Easy to install, I’m not a very “handy” gal and was able to change it out myself.

Installed this Powermax just on 2 years ago and it has run, and still runs great!! Fans kick in every now and then but the best part is my house batteries are charging so much better now. I went through a couple of house batteries when I realized it was the power converter charger (Progressive Dynamics) that was pretty much cooking the batteries. Not so anymore with the 3 stage charging from the Powermax. The unit was a little larger than the original but with a Dremel tool and a few well-placed cuts in the main Parallax/Magnetek power center housing, I was able to get it installed neatly. Installed in a 2007 Winnebago Access 29T.