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

Directions left a little to be desired but works great in my RV

Worked great!

Im rather pleased with this unit. I bought the 55amp version to replace the Magnetek 6345 (45 amp) converter in my 1996 Fleetwood. I pulled out the charger/converter version and added an outlet under the fridge to the side of where the original was. I could have cut the cord off but this was easier for me. Im planning to use it to charge a pair of 105 amp hour AMGs and I think it will do fine for that. With my clamp meter I was getting 20 plus amps into the battery I currently have which is about what I would expect. When its going Im getting 13.7 volts in the motorhome which is again what I would expect. I havent attempted to turn other items in the coach on and use the clamp meter to see what the most it puts out is but I see nothing to suggest less than the rated limits. I will update this if something changes as Im about to go on a 2 month trip. The one thing I will say as it wasnt easy to find online. If youre replacing the Magnetek as I did you will want to run the blue wire hooked up to the 12v fuse panel into the 12v lug the red wire is connected to.

This converter is a replacement for one that failed in my RV. It arrived on time and I promptly removed the old one and installed this one. It was a little effort to install it since the base was not quite the same size as the previous one and the space it sits in is small and difficult to work in. But after testing it and installing it, it is doing a great job keeping my 12 volt system fully charged and functional.

I use this professionally as an automotive technician. It allows me to supply a clean DC power supply to the vehicle while I perform sensitive tasks like control unit programming. Modern day system control units sometimes allow a programming operation only one time to a module. If communication is corrupted at any point, youve essentially bricked it. What I love best about this product is the battery charging feature. It was able to bring back old dead batteries that other chargers could not. It has very literally saved me money! Also, the 55 amp (for this model) crank assist feature is STRONG. Remember youll need to make up some leads for yourself if you intend to use it like I am. I cut up an old set of jumper cables.

Easy to install. Solved my dimming issues with the 12 volt system and undercharging of the battery. Was a replacement to the OEM WFCO unit that didn’t last a full year of usage.

So far so good I bought this to replace my old RV converter that was boiling my batteries pretty badly and this things worked like a charm for the last month. This thing is QUIET! No more incessant humming from the old piece of crap I had. Will update if anything changes.

Works great!!

Upgraded my RV house battery to a 100Ah solar-type SLA / AGM deep cycle battery and learned they need 3 stage charging. The converter in my RV is a very old 2 stage charger. Talked to the battery maker support team and they said my converter would not hurt the battery but that it would never charge the battery over 80 to 85% of full since it didnt have the 14.6VDC mode. So I removed and replaced my old RV converter with this unit and it works great! I bought a battery monitor so I can watch the rate of discharge in detail so I know when to fire up the generator or plug into shore power.