GoWISE Power 1000W Pure Sine Wave Inverter 12V DC to 120V AC with 2 AC Outlets + 1 5V USB Port, 2 Battery Cables, and Remote Switch (2000W Peak) PS1002, Updated Model, Grey, Standard

going on 4 years non stop 24/7 aside from batteries loosing power, works great , wish it would turn back on automatically after no power, not good using on fridge or freezer if not there to turn it back on , for this reason i using an upgraded inverter that turn on after power failure for freezer, using this one for tv computers and stuff thats only in use when there, am planing on making a momentary switch that will work when power returns for this inverter, i like this inverter a lot, works great, very good power regulation, 120v, just like the grid and reliable lasts and efficient, uses about an amp+- no load, just need to make it to automatically turn back on after power loss when batteries regain power.4 years after review ;So i been using this inverter to power wifi and 24/7 because at live at end of power loosing power weekly just st from rain let alone snow . I perchased 2 of these the first one failed after about 2 years , the second one I took apart and reassembled with best heat sink past and so on , now to now , this inverter I rebuilt with better thermal past now has been in service 24/7 for 3 years and is pumping out 1500watts continuesly, why I updated house heat and what not smart everything so I run it off the inverter for I loose everything from tvs to washers from bad power , so now I have maxed it out running at 19.99 to 120 at 60htz , I know I maxing it for it never went below 120v before .its sine wave it also starting to give out at the 1500watts , just let me say that it can run it all at the 1500watts is amazing , I just perchased there 3000 watt model hope it works as good and better .i have had many inverters , this one is a keeper on the mark with its pure sine wave spot on and it's 120v spot on . This one does not flicker the led lights either better then my grid power . Thank you

The posts on the rear of the unit are cheap and are too close together to each other to be safe, without the terminal cable connectors moving and touching when you rotate it to access the front. The plastic tighteners can't be tightened enough to keep the cables from turning/rotating on the posts and shorting out when the unit is turned around to plug in an extension cord. This is a huge problem that needs to be addressed at the manufacturing level. I can't believe this hasn't been brought up before, it's a huge problem. The inverter may be OK but getting past the initial hook-up portion of the installation is very challenging. The fact that there is no rear view online tells me I should have asked for one before buying. If the terminals would have been spread apart enough and the posts had been thicker with standard nuts and washers I would have given this an initial rating of 4 until I had used it for a while, to see if it performs as advertised...... I will review this again after it's been used for some months.....I am hoping the inside is manufactured better than the outside.....May review- this inverter is currently delivering excellent power and appears to be less of a strain on my AGM battery than the Xantrex 1000W that burned out after 8 months..... the rear terminals are still the same of course but it appears to be working well as long as the unit isn't moved once it's setup to be used..... I still maintain it needs to be redesigned to beef up the back side terminals....4/22/17- I raised the stars to 4 because so far this inverter has performed great, irrespective of the posts on the back being too close.... they haven't been a problem since the first problem...... if they were farther apart and stouter I'd give this inverter a 5 star rating... I would definitely buy this inverter over the first one I bought9/4/17- I raised the stars to 5 because so far the performance has been perfect.... the rear terminals are obviously still the same but I haven't had a problem since the first time so it isn't a problem evidently.... the proofs in the pudding- a year and a half almost and no problem with performance.... compared to my first inverter this one is a gem.......

TL:DR: Not pure sine wave. USB output doesn't work. Fan very loud and pulses. Remote causes the unit to turn itself off at random times. Spend your money elsewhere.Updated review after some more use. I hooked up my laptop's power supply to the AC from the inverter and my touchpad immediately quit working correctly. Tried several times unhooking from power, checking the touchpad, then hooking back up. Clearly my computer doesn't like the power coming from this unit. The claim of "Pure Sine Wave Power" is clearly untrue.Also, after more use even if it was pure sine wave I would probably ditch it because of the fan. Not only is the fan loud when it comes on (which is way too often, by the way, even with only about 15 watts of load on the unit), but after about 2 or 3 days of off-and-on use, the fan began pulsing when it would come on. That made the sound very annoying as it was just this constant louder and softer "thrumming" noise.When combined with the other issues (faulty remote, USB power not working), this inverter rates as only barely even functional (it does put out AC current sufficient for basic tasks, but don't use it for your electronic devices!). Junk.Original Review below (rated 3 stars at the time):I got this inverter to power my off-grid cabin. It is hooked up to a 200 amp-hour 12V LiFePO4 battery and the batteries are being charged by 200W of solar panels and a 30A MPPT charge controller.First, the good. AC power seems good so far. I haven't run any sensitive electronics yet. I did check the output voltage and it's pretty consistent around 116 V on my unit. Not quite up tp the claimed 120 V, but close enough that it should power most things just fine.The bad. The fan seems to kick on at fairly low loads (but only when it's been running them a while) of around 15-20 watts. It will run for about 10 minutes, maybe a bit less, then kick back off. The fan is certainly louder than it should be and is rather distracting in an otherwise quiet indoor space. If I have the radio going I have to turn it up due to the loudness of the fan.Second, the USB port in my unit appears to be completely dead. Tried hooking up my phone to it today to charge and it never registered on my phone. Checked the cable with a small lithium battery bank charger and the cable was good, so it appears that my unit has no USB power.Third, the "remote" on my unit is worse than worthless. It does switch the unit on and off, but when the remote is hooked up (or even just the cord for it plugged in but not the switch), the inverter likes to randomly turn itself off. I have read at least one other review where this happened to another buyer. This renders the remote useless.Fourth, the power button is a soft button, meaning that it is controlled electronically and thus the inverter is always drawing power, even when the inverter is "off." I would much rather prefer a hard toggle that physically disconnects the inverter from the battery. When it is off, I want it truly and completely off and drawing no power. This is really important for off-grid situations, which is exactly what this style of inverter should be designed for. This is my biggest gripe for this unit. I'm ticked off that the USB doesn't work at all, and the noisy fan shouldn't be a thing (at least not a low loads). The remote is a gimmick I can do without, but the constant power draw might cause me to return this unit and look for something else.In summary, it works fine as an inverter, but needs design work to fix some significant flaws.