BESTEK 300W Pure Sine Wave with 4.2A 2 USB Power Inverter

Very good and stable 120v while at near maximum wattage.*** Idle consumption is 9 watts while turned on.*** Around 89% efficiency while I was testing it.*** Air outlet was around 95 degree F while running in 70 degree F weather.

Keeps my gaming laptop topped up on power when I'm traveling on the road. Now I don't need to drop by libraries or cafes to charge up.Plugs right into the 12v cig lighter and you simply flip a switch. The price is really good too ($40), considering what these sell for elsewhere/locally.The "pure" sine wave spec is also much appreciated (over "modified" sine wave) to give a more consistent flow of power.Couldn't ask for a better mobile power solution. No extra batteries needed.

I build battery backup units for friends using medical equipment such s CPAP machines. The best pure sine waver inverter in the 300 watt range is the Bestek unit. I have purchased 12 of them so far. The picture shows my completed unit with lithium 100 amp hour battery in a modified trolling motor battery box. The inverter easily runs CPAP machines on full heat/moisture.Besides being very reliable, the Bestek pure sine inverters have 2 USB ports that are energized whenever the inverter is plugged in to the 12 volt cigarette lighter outlet. These ports do not require the inverter to be switched on to charge a phone. Bestek also makes a modified sine wave inverter that looks similar. It costs less and I don't have any experience with them. The pure sine wave inverter has the chevrons on the case to easily identify it as the better unit.I attach my Bestek inverters to the top of the battery case with Velcro strips so that it can be used in a car if desired.

This was about 40% less than other brands so I gave it a shot. I also have the non-sine Bestek 300w inverter which you can see in the pictures. I'm using it to charge my wife's car battery with a CTEK 7002 (I like -Tek stuff I guess) battery tender and a 35AH SLA battery. There are no outlets near where she parks so I needed a solution to charge her car and this fits the bill. I'm using a fuse tap rated at 15A and the charger does 7 so I should be good.The non-sine inverter does work for this application but if you're going to leave something plugged into your car for a few hours unattended you probably want to spring for the pure-sine version, just in case.

As described and quiet. I haven't used it other than to charge my phone via USB and it charged petty fast. It's definitely a must have for the vehicle and perhaps a life saver!

Works perfect

Will be buying a few more of these. Perfect for small applications

I've had it about 2 years, and it's working good.But for a while, I thought it wasn't, I like it and it's quiet. In fact , sometimes the fan doesn't even need to be run , which is great. I live on a sailboat at anchor in the caribbean , and it charges most everything to include twenty four inch flat screen t v laptop phone et cetera

good for travel to operate a heating pad for my wife's soar back . did everything i asked it too ,plus it has USB connections for phones and such.that the plugin connection took up the 12 volt outlet.

Super buen producto cumple todo

I had great success powering my Dell laptop and working while my family drove me to vacation! Nothing like working that remotely! Later however, I must admit I had a malfunction with my inverter, and when I reached out for troubleshooting help I received quick replies, compassionate and professional attitude and a quick resolution. I ended up receiving a full replacement just to make sure I would not have the same issue again. I haven't had that kind of a positive experience from other companies in a long while. WAY TO GO BESTEK, and especially the rep, "Lan" -- Thank you!

That it worked on first use. Purchased to run medical equipment in car over a long road trip.

This is a good buy for a pure sine wave inverter. I needed something to power my electric blanket in a semi and the one I had kept faulting. This worked with my unit. I recommend

Excelente producto

Works great! Convenient size for car camping. Used it to keep cooler going. Maintained temperature, easy to use, plug and play!

This inverter works great in my car. It is quite and small enough to fit in the glove box.

Great price

Handles Galaxy S25 plus running 2 programs on the road plus friends phone and laptop on 9 hour trips with no problems.

Great product and very ease of use. I ran into an issue with overheating, but I am using this outside and running a 50w fan continuously. The ambient temps are causing the unit to go into a shutdown mode. The customer service had helped and replaced the unit for me, but the other still had the same issues. No worries I’m sure it’s just my application which is causing the problem.

This is a great little sinewave inverter. I purchased it mainly to power a tv with Travelfi when in the rv, and if I needed to work I didnt have a way to power my laptop without running the big generator on my rig. It’s simple to use, but needs to be monitored with a timer as you want battery voltage around 12v with engine off. Very happy with this…

I had an issue with a unit I purchased from Amazon. I reached out to the company’s customer service who sent me a new unit that had worked great. Saved me the hassle of sending the old unit back for a refund.

This worked excellent for 30+ hour road trip in a Prius using a Starlink mini. It runs quiet. I've had no issues whatsoever so far.

Very good

It performed well enough for a 6-hour drive with the Dell laptop fully in use and plugged in.

Works well so far. Nothing to complain about.

Quiet and efficient. Using this to power a CPAP and the air pump for sleep number bed in RV.

I travel a lot and my existing inverter was only 150. My laptop power supply is more. This does the trick.

For what I plan on doing with this, it will work just fine. It is nice and compact and the fan is quiet. It will not work with my 4000 peak amp jump starters when I plug into the 12 volt 10 amp connector. Evidently, the internal electronics of the jump starters think the inrush current is an overload and shuts down. I ordered a couple of Milwaukee type 12 volt tool batteries with an adapter to connect to and wired it to the cigarettes connector and now it works fine. It would be nice if they could add circuitry to reduce the inrush current. The sine wave is very good. The frequency is right at 60 hertz and very clean and the voltage is at 111 VAC. Turn on the unit before plugging in anything to it. It take a second or two to stabilize.

The first unit didn't work properly for my application but the manufacturer has the best customer service I have had on Amazon. Multiple helpful message exchanges and resolution for the problem. I would buy from them again in a heartbeat! This is amazing service!