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

Priced right. Good quality unit. I removed the World Products power supply and easily slid this in its place making no mods . Received it the day before leaving on my vacation. Charges my agm batteries well. Fan comes on as needed for cooling and does not run excessively, or as noisy like the World unit. There is a green led light next to the fuse that is handy for quickly check that it is functioning. I did not want to cut the ac plug off to wire it in so I used the end of an extension cord for the connection. this way I did not cut into the products original wiring. I am very happy with the performance of this converter/charger.

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

Update Jan 29 2015, Sent back,. Told it was a mislabeled 15 amp unit. I would recommend others use a good clamp-on ammeter and see what they really got. I ended up buying an Arterra WF-9865 65 Amp DC Deck Mount Converter. Puts out 74 Amps, Fused for 80 Amps, linear reduction in charge until final trickle charge @ 2mA @ 13.25V. Just perfect. Matt Update Jan 8 2015, My 55 Amp unit still performs as if it is a unit rated for 19 amps. After talking with a very polite Service Engineer about this issue and given all the good ratings, I figured I owed an extra round of tests to verify my initial findings. This time using a different set of conditions. Instead of discharging the battery set @ 120 Amps down to 10.5V I reduced the discharge rate to 27 Amp/hrs until the battery source reached the same 10.5V. At this point the load was removed and this charger connected and recharge was started same as in the first tests. Of course, at that point the 230 Amp/Hr battery was in need for the 55 Amp charge rate. Unfortunately the charge rate was again, just 19.3 Amps. Bottom line is.... at this point I am very suspicious. The documentation shows operational mode curves without numbers which makes them curious but useless to me. The units 3 stage charge control intelligence logically transitions as expected but the units maximum output is still just 1/3 its claimed rating. Working with seller to resolve the issue. Matt Submitted Jan 2 2015 (by the guy that bench tests stuff before installing) * Unit is rated for 55 Amps but its maximum output will never exceed 19.3 Amps even while loaded down to 10.5 Vdc. No explanation can justify this as normal. Otherwise it controls excellent as the 3 stage chart indicates. I imagine this unit is mislabeled or defective. * I wish I understood why it came with a 30 Amp fuse. Documentation says its for Reverse Polarity Protection. Sounds like a good feature given this units output connectors are not labeled at all. Meter it and label it immediately if you get one. * If the unit is just defective and not just a overrated output claim I will very likely bump it up a notch and get a 75 Amp replacement but waiting to hear from the seller first. Judging by other readers I hope for a 5 star update soon. Matt

Bought this for a 2010 Keystone Hideout 23 ft camper. I just cut the cord and wired it directly like the original converter. Had to fold the rear tabs under due to depth limitations. 30 minute install and now I dont have to waste vehicle gas to charge battery and my replacement LED bulbs are super bright.

De que dejo de funcionar y no me responden para mi garantia

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

It has a three stage charging system.

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

Install was easy. Mounting holes were same spacing but 1/2” wider then old one. No biggie. You do hear the fan kick on and off if all is quiet in motor home. (But how often is that). The fan should allow for longevity. I like the constant even voltage, and keeping my batteries charged. It does still work if battery is removed.

It did its job but with weird nuances. 2.5 years in it started acting sporadically. Its almost like it was ignoring the potentiameter for setting the charging voltage. Brand new, it had no problem bulk charging at 14.1V for my batteries. During our last trip, it cut out and tripped a GFCI outlet(We didnt know thats what tripped it at the time). Checked all of the equipment and everything else in the RV was running fine. No odd voltages. Got home from the trip and noticed the bulk charge was stuck below 13.5 volts instead of 14.1 where we had it set. I was fed up with the unit and vowed to repalce it before our next trip. The next day, I checked on my rig and found that one of my AGM batteries exploded and the the charger was running at 14.8 volts?!!!! WTF!! I was livid. That was a very expensive battery. I immediately disconnected it and I am grateful it didnt burn down my RV. I will never again purchase a product from this company.