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

I work for Mercedes Benz and their equivalent cost 1,000$ from midtronics. This does the same thing for under 200$!!!

I ordered this converter to replace the giant OEM converter that was sucking our house batteries dry in our 1986 Foretravel Grand Villa Barn Find restoration project. The install was straightforward and simple. I have watched the converter for about a week now and it is keeping the batteries very stable and functional. I have attached a picture to show the compartment that will be an Auxiliary electronics bay. Eventually this will mounted on an aluminum slide out tray for servicing or additional wiring. Although the old converter was a 75 Amp converter, I seriously doubt that the old converter would push the 75 amps, so in this instance, I opted for the 55 Amp model. Under full load, the Powermax is more that adequate. Also the fan noise is about 80 decibels less that the original. Its fan is temperature controlled and is not much more than a whisper when on. the old converter sounded like a box fan from the minute it went on shore power and ran constantly. My thought is: If you are looking to replace your old battery burning converter, look no farther. The Powermax converters are dependable, quiet and will do the job you need quite admirably.

Easy to install. Replaced old converter because no longer charged coach batteries. Has adjustable charging capability. Great price.

The converter arrived on time and worked perfect right out of the box! My motorhome batteries were low so it ramped right up to 14.6 volts, stayed there for about 2 hours, then dropped to 13.8 volts for about 4 hours then went to 13.2 volts and has maintained there ever since. The next day I turned on the furnace all of the lights and both tvs and it held steady at 13.3 volts. It has only been a few days, but at this point I couldnt be happier with this Power Max Converter! Here is the link to a pdf that shows how to install it, that was easy to follow and worked perfectly. Ive had it now for a couple of months and it is still performing great! [...]

I am using the inverter to charge 2 deep cycle batteries for use in a small cabin in the woods. The cabin utilities rv 12vdc appliances, water heater, water pump, refrigerator, furnace, exhaust fan, usb outlets and lighting. The 2 batteries deplete to about 40% in 24hrs and using generator 110vac power, the inverter will fully recharge the batteries in about 2-3hrs. The inverter puts out very little heat and the fan only runs periodically for a minute and then shuts off. The inverter makes no sounds except while the fan is running. The only downside is the green green light which indicates the inverter is powered by AC voltage. Its fairly bright.

After I had a professional come out & fix my wiring problem, the unit works fine.

Easy install and no noise at all, works great in our 5th wheel

Easy to install and simply works great. Can have all 12v lights in my travel trailer on and they never run down when the unit is on - which was not the case with the original unit i had. This Powermax is really a great repalcement unit

760 watts at 60 amp is what im seeing out of this and it sure beats the 55 amp battery charger i was using all to HILL. This thing took no time to charge to absorption mode from 853 amp/hr battery bank that was 80% and the 10-15 amps coming in from solar didnt hurt it one bit infact that made it use less electric. I was concerned that the solar charge would blow it but nope it helped it be more efficient instead by not having to carry all the load of charging the batteries. ordered it 7-20-14 got it at my door 7-23-14 NICE! About the fan its temp controled was not on at idle and did not turn on till like 5 minutes after i hooked it up. and the air was not super warm but was warm and LOUD. While this thing is on Idle not doing anything at all it uses a whole 15 watts of electric thats one super bright CFL light bulb at about 900 lumens rated. I realized this kind of power is acutally low for a solar system but for me topping off my battery bank and the use ill have for it its enough. My normal solar useage is at 15-20 amps drain on the batteries from inverter around 200 -250 watts with this charger/power supply ive still got enough left over to charge the batteries at a slower charge rate plus what ever im getting on cloudy days from solar. Final thought- as long as this thing holds out and last Ill be happy with it Ill know more later i just got it and hooked it up today. 7-23-14 7-25-14 left it plugged up with out the dc cables connected to the battery overnight and through the work day got home checked it out and discovered warm air floating out of the top hooked the dc cables up to the battery cables to boost the batteries a bit and it had hardly any output at all. Unplugged it and unhooked the DC cables for a couple of minutes connected the dc cables plugged it up and it started working. HMMMM suppose my suspicion was correct about the leaving it plugged in and not connected to anything. DONT DO THAT for charging mode 8-24-15 Update: Still working great ive had to use it alot during cloudy days output is 53 DC amps useing 750 ac watts. About 2 months ago started hearing the fan after it gets turned on but it gets quite again after a few minutes. My guess its a cheap fan and ill have to replace it soon. 2-15-16 Update ok replaced the fan with Artic F8 TC fan doing great but ive had one part not survive. Turns out (without the help of Power Max i got no return call back) that this part is a NTC thermistor ive changed the part 2 times already and havent had the rite value to keep it going this last time lasted a little over 2 months im thinking they over compensated on the cheap fan and high speed to make up for the 10 dollar part i have coming in now this part gets REALLY hot it provided a buffer level and dampens when the unit is first turned on so that the main component are NOT getting full power when the unit is turned on during the charge state. The last part i put in was rated at 15 amps this next one coming in is rated at 35mm disc 2 ohm resistance 35 amps and can handle 235 degrees before failing. I think this might do it the trick but then again the unit is rated at 55 amps Im an electronic tech so i know not to over due it to much heat and the board will burn and not enough rating it will blow again. I may be willing to give it one more go with a 50 amp rate NTC Thermister but that cost is gonna be about 20 bucks plus shipping. Hopefully this 35 amp rated one does the trick. Ide hate to have to go back to a high speed SUPER LOUD fan the Artic fan has really good air flow and quiet but the delay time for it to turn on from factory settings is just a bit long. update 6-16-16 unit fixed no more problems with it at all its held up just fine with the last part that i got. Shame on power max for putting a weak component in this unit but if they built them to last they would be out of business i suppose

Finally got this Converter installed. It is working perfectly in my camper. Has three phases of power generation, from quick charge to steady system 12 volt to trickle charge. Used original converter chassis so the Power max slipped right back in the panel. Did have to drill some cooling holes. The original unit is no longer made, so, any converter would have required work. The PowerMax is the easiest to convert to my rig! Working Fantastic so far!