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

Got this last May for my camper. Worked great until last week when the voltage regulator went out. I called the company and they shipped me a new one in 3 days.

Works 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.

You loosen 3 screws on the old one and unplug it. Put the wires back just like you took them out and plug it in. DONE 10 mins. I was a bit surprised that the exact brand and part number that I replaced 2+ years ago had already died. Im giving the same brand another chance. Its says RV so open your wallet.

I recommend 200% this little one works so good, like a big monster..

Was very easy to install and works great, have had on my rv for a couple of months and still working great.

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

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

My original was narrow vertical mount and a defunct company. I was able to have enough space to floor mount this near original area. It seems to be doing the intended job of keeping the coach batteries charged and the rest of the 12 volt system up proper level. The noise level of the cooling fan is quite minimal and actually an assurance that it is working. The 55 amp unit was considerably less expensive than other makes of same amp range. So time will tell if it is less expensive or cheap junk. Ive had it only a couple months; so far, so good. Id give it 5 stars if it would create its own power !!

So far - Very quite and works perfectly for powering up the 5th wheel 12volt system. This unit is rated 10 amps higher than the one I removed that had burned up. My 5th Wheel has a battery disconnect switch and I am using this with the batteries completely disconnected. The only power is it having to supply at this point is the solenoid that connects the power distribution station to the rest of the trailer. This is because I am sure the batteries are old and have internal shorts. I cannot get them to take a charge at all. I dont want to spend 200.00 on another set of batteries that will just be sitting for the next 8 months. That is why I have the switch set to full disconnect from batteries. Considering the local camping supply outlet wanted 100 bucks more than this one (for a 55amp unit), I decided to test this unit out. I read the review about the actual output compared to the rated power output being only half of what the sticker states - but when I took out my old 45 amp unit, the sticker on the bottom that had the Quality Control testing specs hand written on it were approximately half of what the sticker said its max rated output was too. So I thought Ill give it a shot. My needs are not any where close to 45/55 amps for the purpose Im using it for. Hope this helps