Cheap, but not reliable source of AC power
598418
Did not work correctly when it arrived. When you plugged it in, the red indicator LED would go on, the go off. When I plugged my 12-volt device into the adapter, it powered up, then shut down immediately. I knew I had some kind of intermittent connection somewhere. I took a gamble and opened up the case (I wasn't going to send it back - so I thought what have I got to lose?). It turned out the wires had fallen off the spade connectors to the external AC prongs. I merely soldered them back on, put the case back on, and voila - a working unit! Now that it is working, however, it gets quite hot when you leave it plugged in the wall. It doesn't seem to be UL rated, so I would strongly recommend that you disconnect it from the wall when not in use. Or, shell out the $20 or so and get a robust 12-volt adapter that is UL-rated.
623210
I bought this power pack to run a wireless router in a remote location.  However, after a few seconds the power pack turns its output off. Unfortunately this power pack has an undercurrent "feature".  If your device draws less current than the power pack undercurrent threshold the power pack will go into standby mode and disable the outputs.  While I can see the utility of this feature for battery charging of unattended devices, it makes it useless for powering low current equipment. To make the power pack stay on to power my router I had to plug in a laptop into the other power port.  Thus I had to waste battery power just to make the power pack stay on. If the description had warned about the undercurrent "feature" I would have bought a different power pack.
586284
I purchased this item to provide in-house operation of my Dometic CDF-11 12V compressor fridge, which is rated as a 30 watt power draw.  At the rated 13.8 volt output of this power supply, that translates into 2.17 amps.  While the ratings claim 5 amps as a constant output capability for this power supply, when I attempted to operate the fridge from ambient to a set 35 degrees, the power supply overheated and went into protective shutdown in about 30 minutes.  Suspecting that the fridge maker had provided a lowball number, I  wound up rigging up a multimeter to a short 12 volt extension cable I had lying around and monitored draw as the compressor operated.  Though there was a slight transient startup draw of a tad over 3 amps, that was as high as i saw in 30 minutes of monitoring. Constant draw hovered around 2.2 amps while the fridge ran.  And the thing obviously overheated again and went into overload protection, this time after about 33 minutes.  SO - It's rated  for a constant 5 amps, but in an air conditioned house with ambient temps in the mid 70s, it overheats at less than half its rated output!  I  took too long (over 20 days) to get around to applying for a return, and now I get to own an ugly paperweight that purports to be a power supply.  Dear Amazon, please heed customer feedback and stop carrying deceptively labelled JUNK!
2603486
Works, then fails when you need it.  The unit stopped sensing AC power and the unit would continue to beep.  I contacted CyberPower and they sent another unit.  I attached my PC to the new UPS.  The breaker tripped.  The UPS kept the PC up and running, no problem.  When the power was restored it again did not sense AC power and continued to run on the battery.  I have many other UPS's that work without any problems.
1082816
This worked fine for a couple of years on an older power inverter less than 100 watts of output (probably 75 watts).  I tried it on a 150 watt inverter (ironically another RoadPro product (PD150)) and the plug melted within a few hours of use.  Based on the other reviews, I'm surprised the fuse didn't blow first.  I'm disappointed that there doesn't seem to be another trusted brand to use as a replacement.
4524637
After a couple of months the power connection broke...cheap product!
2771668
These low priced AC adapters tend to have overheating problems and shorter lives than original equipment versions, but if you balance the frequency they have to be replaced against the price diffenence you come out ahead buying the cheap ones.  Just be sure you have more than one so when one dies ou can keep working until the new one is delivered.
311349
It works but you cannot move the unit while in use.  It loses
power due to the flaky and poor power supply connection.
709554
Blew the fuse of my cars electrical system the moment it was plugged in.. I was better off using an AC converter which doesnt blow out like this
4964466
one of the ac adapters was DOA.  trying to get a replacement....
4565355
I ordered two of these, but I ended up having return one of them. For the price these are good power supplies, however they are only rated at 75% efficiency, which is not so good. Both of these were running at close to 100% for two weeks, so honestly I'm not surprised one of them ended up failing. For a budget gaming build these would be a good fit, but for a high end computer, go with a higher quality power supply.
186306
Convenient, but constantly turns off. Part of why I have this is to charge my devices, but when  it shuts off after 5 minutes, no matter the cable used, it's not very useful
3113060
I got this to use with a power inverter. The action of the breaker and the feel of it is very cheap. Almost feels empty. The terminals are much too small for cables capable of handling a load anywhere near 300 amps. I don't have much faith in it and will replace with a better unit or fuses and keep this for backup.
455650
Pretty good 2000W pure sine wave inverter for the price.  Some observations and unscientific testing results follow.
Pretty sturdy terminal connections.  I don't think that 4 are necessary (supposedly used to split the load). Construction is just ok.  The bottom panel is kind of flimsy. I don't like that the terminal connections aren't protected.  I didn't use the USB port, seems useless.  I thought about plugging in an extra fan with a USB connection to keep this cool (which you will most likely need).  But you can use the D/C load from the MPPT charge controller just as easily.
Upon start up @ 55W  with a small load all was well.  Fan came on at 300W and stayed on continuously after 400W.  Seems problematic given this is a 2000W inverter. Continued testing to 1800W and then to 2200W and it didn't shut down.  In fact, I could't put enough load on it to make it shut down.  I ran an air conditioner, heater, blender, and an iron.  My concern is that the fan never shut off.  And after all the testing (about 30 minutes), the unit was hot.  With no warranty available, I just didn't want to risk it so I returned it.  The 6 AWG cables are useless.  Replace with 2/0 cables.  No GFCI protection.  The inverter should have one.
4840707
I can get this unit to charge my laptop if I place it so that just the right amount of directional pressure is applied, and then not touch the cord or move the comp until it's charged.  Don't even think about picking it up and placing it on your lap while plugged in.  You get what you pay for.
439515
Tiny wires couldn't carry any meaningful amount of current.
4717024
Not as powerful as I had hoped for. Lost power intermittently when using with a plug adapter. Costs too much to return, so might just bring it to work to have for backup if A/C fails.