300W Pure Sine Wave Power Inverter for Car Truck RV Adapter DC 12V to AC 110V 120V with USB-C PD30W and QC3.0 USB-A and 2 AC Outlets Compatible with Lithium Battery by VOLTWORKS

I bought this inverter when I changed my system configuration to 24V. My old inverter was a 12V 1500Watt Pure Sine Wave and ran about 115V. It ran most things well, but couldn't handle my large ShopVac, and even with a minor load the fans on the inverter would cycle every couple minutes.This inverter runs everything I plug into it including a ShopVac and Refrigerator simultaneously. Its output is ~120V, the voltage drops little with heavy loads. Running 1,200 watts voltage does not go below 117V and averages around 118V.The fan rarely operates, in-fact it never cycles when the continuous load is less than 150W. So for me it will run my refrigerator and be absolutely silent. Had me worried at first that the fans might not work but the unit stays cool to the touch and the fans do work. Fan only runs when the unit hits 104F, so just keep the inverter in a nominal conditioned space of <80 degrees and you are good.My tests show it meets the claimed 90% efficiency and no load current of .9A (inverter on but no load). Power when turned off was in the milliamp range.I disliked the remote and lack of information on the pin-out as I use a relay to start the inverter. To turn on the inverter you either; push the button on the unit, button on remote, or use a relay to short pins 1+2 at the RJ9 port for ONE SECOND. Shorter duration will likely fail as the unit has to come up to the proper voltage for startup.I disliked the use of an RJ9 port, this is the narrow plug used on telephone handsets. Making it "unusual" to work with. And I had to buy some RJ9 crimp plugs for my bench stock.The information on the RJ9 port pin-4 is some kind of pulse coding, almost looks like garage door coding on my scope and the pulse duration and amplitude seems to follow the load. I am simply processing it as an analog signal (milli-volts) to determine if the inverter is on or off.The handheld remote provided does work, but having that wire is like being tied to a leash. Just seems like something you would have in the 80s. Hoping to get more information from the company.Other than those few issues, I rate this inverter as Excellent.1 Year Update:- Zero issues with this inverter for the past year. Not even an overload restart.- I use it 24/7, my daily peak is about 900Watts but on average I am drawing 280Watts from it 24/7.- Running from the inverter 24/7 are: 1 standard 17+cubic foot Refrigerator, 1 Air Cleaner, 2 PC Computers, 1 Base Station GMRS Radio, 1 Laptop, 2 End-Table Lamps and several USB charging stations.- Unit runs at 92% efficiency which is above the stated 90% efficiency. So for me if I draw 1000Watts of DC from the battery will run 920Watts of AC loads. This is great efficiency for any inverter.- The outlets are NOT GFCI (ground fault) protected. This is now a USA code issue for household inverter power, if you wish to have this feature I recommend you buy a GFCI with a pigtail plug. You plug that into the inverter and connect your loads to it.- GFCI or not make sure you ground the unit case solidly (quality connection). In addition (meaning you still need the case ground), you may want to connect the one of the inverter outlet grounds to a grid ground receptacle. DIY two male plugs and one wire, a 12AWG green wire. Just make sure both ends connect to ground or be ready for sparks and flames.- I stopped using the outlet signal from the RJ9 plug (pin 3/4) to determine on/off status of the inverter. Instead I use the 5Volt signal from the inverters USB port to determine status. (dah on me for not doing this first). And this USB method would likely work well with a small 5Volt relay.- Still using RJ9 port pin 1/2 to operate the inverter. Remember, needs to be shorted for 1 second to turn the unit on.- Picture 1 shows my rather custom and elaborate setup that may help some of you.- Picture 2 I included only for the DIY aspect of the lighted plug. Really some good benefits to using these lighted plugs... its lit so the inverter is on and electricity is at the plug.- I have an external box that my loads connect too. Inside the box I have a dual pole 16Amp supplemental circuit breaker and a contactor. The circuit breaker is as stated, supplemental. The contactor I use with a control system to transfer between inverter and grid.- This is a high frequency inverter so it is best for non-motor (non-inductive) loads, but clearly it handles my refrigerator and occasionally my shopvac without issue. However, if you plan on running something like a sump pump or AC at 1HP or more you may consider a higher rated inverter, or a similarly power rated Low Frequency Inverter. Low Frequency Inverters are bigger and cost more... But nothing beats getting the right stuff for the task you require of it.Bought a Second OneMy systems operates 24/7 as Off-Grid inverters do. Most of the components in my system were redundant. Multiple panels can be reconfigured, 2 charge controllers, 8 batteries etc. But the one single point of failure for me is the Inverter.So after running the first inverter for over a year with zero problems I bought a second one. Bagged up the first one and the second one has now been running flawlessly 24/7 for just over a month. The plugs were exactly the same, and it is performing exactly the same.My inspection of the unit that has been running for a year showed absolutely nothing of concern, and I was happy to see not much dust/dirt buildup on the fan or components. With electronics in general if they run for 90 days they tend to last a long time thereafter, often called a "burn-in" phase.Thinking this was another home run.... will do a third update if it proves untrue.

Update 4-26-2021My system has grown quite a bit and I have lots of new equipment. Although it might not look as clean it is much more powerful and the inverter now runs flawlessly day and night. I basically never turn it off except when the sun doesnt come out for 48 hours or more. My shunt shows I run about 70kwh through the inverter every month. I can confirm that this will power a 700 watt microwave with no issues at all. (700 watt advertised microwave is actually 1100 watt draw, which is 1300 after inverter efficiency losses.) Also have tested a 5000 btu window unit air conditioner and it works just fine. I am very pleased with this item :)Update 6-18-2020Voltworks responded promptly to my email and was very courteous. They asked questions about my unit and took care of the problem right away. I am currently waiting for a replacement to arrive and im happy to see this company honors their warranty!Update 06-12-2020I have been using this inverter everyday since the day I wrote the 2nd review with a new set up (vertical) and it has performed flawlessly until now. This morning I turned it on like I do every morning and it gave a very loud buzzer so I immediately turned it off. waited 10 seconds and tried again and nothing. No sound, no lights, no power at all. I have emailed the company as the photos and the box which I still have both state 18 months warranty. I have not yet received a response but will continue to wait..Update 10-15-2019So far ive used it to charge my macbook, power drill, gopro batteries, a few portable power banks, and a fan. No issues to report! Works great!(oct 3 2019)I was worried this inverter might not be enough just because i have a doubtful nature and i could not find any videos of it supporting a tv that is 55"Took a chance and i am happy so far! Tested it last night and it powered my 55" for 2 hours off a 100ah AGM battery. Worth the money!

This is my second purchase of this inverter and I'm very pleased with its performance. The remote control works well, but I'd like to see the actual battery voltage displayed, not just a bar graph. I really like the soft start feature which has allowed me to run the A/C unit in my shop with it, which other inverters the same size could not do. It also has good overload protection.It works well in my little 2.4kw portable solar unit, combined with 730 watts of solar input and 2-100ah LiFePO batteries.

I added a solar panel to my roof, plugged it into a solar regulator and then a 12v 100ah lifepo4 battery. I plugged this into the battery and then used it to power my wifi, router and modem. I had expected it to run out of power soon after it got dark. By morning, the sun would be up and the wifi would come back.Unfortunately, the first night at like 4am I hear this screeching buzzer. It's the low voltage alarm. You need to turn it off manually. That's it. There's no way to actually disable it with a switch or setting or anything. So, the entire idea kind of failed.Other than that, it works great and is a good deal if you're ok with that buzzer thing.

Compact, quiet, quality inverter. Great for car trips where you need to charge your computer or cell phone fast.