300 Watt Inverter (What You Can Run & Top Products)

By:Michael Johns

best 300 watt inverter

Power inverters are an integral part of camping or long travels. You and your friends will always require extra power to charge your modern gadgets. This is not a luxury anymore but a necessity. 

For an on-demand and uninterrupted power supply during travels, camping, and during power outages, a 300 watt power inverter is a great balance between power and portability. They are perfect for laptops, smartphones, tablets, emergency lights, weather stations, and many other small appliances. 

There are a ton of different types and qualities of 300 watt inverters. Some are fabulous for modern gadgets while just the updates of their previous version. The price and features on offer is mind-boggling. It can become a minefield when deciding which product to buy!

To help you out, our research team has come up with the list of the best 300 watt power inverters for you to choose from. These inverters come with the top features and modern technologies. Plus, they’re all tested for safety and durability. So keep reading to find your perfect power buddy.

What Can a 300 Watt Inverter Run?

Wondering what you can power with a 300 watt power inverter? Well, you can charge all your portable devices such as phones, laptops, and tablets. Plus you can even run some small home appliances such as LED TVs, fans, and games consoles. One benefit of these inverters is that you can purchase them with pure sine wave output which allows you to run more sensitive devices.

To give you some idea of what you can run I have created a list of devices and average wattage:

ApplianceAverage Watts
Portable Games Console 5-10
Digital Camera10-20
Small Fan25-40
LED Lighting10-30
PS570 – 200
60 Watt Light Blub60 (duh…)
32 inch TV50-100

Best 300 Watt Power Inverter Reviews

1. BESTEK 300 Watt Pure Sine Wave Inverter

Let’s kick things off with a product that is hard to beat.

BESTEK brings a pure sine wave inverter with a smooth 300 watts of continuous power and 700 watts of peak power. Enjoy plenty of options with 2 AC outlets and 2 USB ports, great for charging equipment like laptops, string lights, speakers, cameras, and portable game consoles. When it comes to quality power inverters BESTEK is a leading name. 

The USB ports have a smart charging capacity to automatically detect the connected device and deliver fast charging up to 2.4 amps per port. These posts are ready to charge mobiles and tablets simultaneously. It even has a smart inbuilt fan and unique vents to effectively dissipate heat, keeping the device cool. Adding to this it’s easily plugged into any standard cigarette lighter socket for a speedy setup.

The unit is protected by an inbuilt 40amps fuse, providing complete protection from short circuits, overcharging, and voltage fluctuations. An outer casing made of aluminum alloy makes for a lightweight product while protecting it from falls and bumps. 

Easily store it in your car and take it on road journeys, camping sites, or use it indoors to power all your devices.


  • Pure Sine Wave
  • Smart Cooling Fan
  • Built-in 40 Amps Fuse
  • Aluminum Alloy Housing


  • Fan can be noisy

2. Maxpart 300W Power Inverter

The Maxpart inverter converts 12V DC power to 110V AC power. The device comes with 2 AC outlets of 110V and 2 USB ports of 2.4A power and a 12V car cigarette lighter port.

With this awesome versatility, you can easily power multiple appliances like laptops, breast pumps, and tablets, while the USB ports can simultaneously charge most tablets and phones. 

With the extra cigarette lighter you can connect other compatible devices like a portable vacuum cleaner and air pump. Its inbuilt cooling fans protect the device from overheating. It also has other protections feature like overload protection, short circuits, and voltage fluctuations.

Connect the inverter to the cigarette lighter socket of your vehicle for power on the go. An exclusive design patent enables Maxpart to deliver a unique product with added durability and performance.


  • Exclusive design patent
  • Extra Cigarette Lighter Plug
  • Built-in Cooling Fan
  • Full Protection


  • Battery cables are not long enough

3. GISIAN 300 Watt Pure Sine Wave Power Inverter

I love the design of this one, something about black and gold draw me in…

The Gisian inverter is a powerful device delivering 12V DC power to 110V AC. You’ll get 300 watts of continuous power and 600 watts of peak power. 

The big benefit is that this is a pure sine wave inverter with 2 AC outlets and 2 USB ports. The AC sockets can easily accommodate two large plugs to simultaneously power your devices. It’s power for the whole family!

The AC outlets are ideal to run devices like small fans, TVs, Christmas lights, and breast pumps while the USB ports are used to charge devices like mobile phones and portable game consoles. 

To monitor your voltage, the device also has an intelligent LCD screen displaying the operating status. Its shows I/O voltage, load capacity, and battery capacity. You can easily know the battery status if it is full, normal, or empty.

For easy installation, you also get a cigarette lighter adapter and car battery clips for connections. 

This unit provides multi-protection features like a cooling fan to reduce device temperature, along with guards against power overloads, short circuits, reverse power, and voltage fluctuations. It is compact and portable and can be carried around easily. The ideal device for camping and vacations or at home during an emergency.


  • Powerful Output
  • Wide range of applications
  • Intelligent LCD
  • Multi-protection features


  • Needs more fastening screws in casing

4. Geloo 300W Power Inverter

For a simple no-fuss option stop here.

Geloo 300W power inverter is a newly upgraded premium inverter. It is a modified sine wave car power inverter with two 110V AC outlets and 2 USB ports. The USB ports automatically detect the connected device to give the optimum charging speed. The inverter is ideal to charge and power devices like iPhones, Tablets, Cameras, Laptops, and MP3 players.

The device comes with an in-built fuse for the protection of your appliances and battery. It has a safe charging design delivering extra protection from overheating, overloads, overcharging, and short circuits. Plus, an in-built smart cooling fan works silently to cool the device and protect it from shortages. The fan is temperature-controlled and works effectively. A durable metal body of the inverter also protects from falls and bumps. 

It’s neat, compact, design is about the size of an iPhone, easy to store in the dashboard or glovebox. You can directly plug it into the cigarette lighter socket. The cigarette lighter plug comes with a long cord of 33 inches so that the inverter easily reaches the backseats of the vehicle. 

An ideal companion for an outing, camping, or powering devices indoors.


  • Fast Charging USB
  • Mufti-Protection features
  • Smart Upgraded Cooling Effect
  • Portable


  • Sockets are too close. Difficult to plug both of them at the same time

5. ALLWEI 300W Car Power Inverter

The ALLWEI car power inverter is an ideal device providing continuous power of 300 watts and peak power of 600 watts. You’ll instantly be converting the 12V DC power of your vehicle to 110V AC power suitable to power devices like a nebulizers, game consoles, TVs, DVD players, and Christmas lights. 2 handy USB ports with 4.8A/dual charge is ready for devices like mobile phones, kindles, and mp3 players.

Stay completely safe with multi-protection features. An inbuilt fuse and guards protect you from overcharging, over and under-voltage, power overloads, and short circuits. Plug directly into the cigarette lighter socket and long cord of 33 inches to reach the backseat of the vehicle. A must-have if you want to keep the whole family happy on long journeys!

Everything is kept cool by a very silent automatic fan that is temperature-controlled. Its outer shell is made of a durable casing protecting it from drops and accidental falls. 

You’ll be powered up on the road, all day, every day!


  • Fast Charging USB ports
  • Multi-Protection features
  • Upgraded Cooling Effect


  • Struggles on max load 

6. KOOSLA 300W Pure Sine Wave Power Inverter

Nest up, KOOSLA brings to you a 300W pure sine wave premium car power inverter. For amazing adaptability, it comes with 2 AC outlets, 1 USB-C port, and 2 USB ports and you can charge 5 devices simultaneously.

As it is a pure sine wave inverter it provides stable current and complete safety of sensitive devices. A 60W PD 3.0 Type-C port provides quick charging for laptops and tablets. The USB ports also automatically detect the connected device and deliver charging speed up to 2.4 amps per port. 

You’ll go crazy for the ultra-compact, small-sized, and lightweight design. In fact, it’s “the smallest” pure sine wave car inverter in the 300 watts category. An ideal device that you can keep in your car to use for your road trips, camping, and vacations. 

Instantly connect to a cigarette lighter socket or you can separately buy clip wires for connection to your battery. The device is built with UL94-V0 level fire-retardant material for complete safety. It even has a 40amps built-in fuse to protect against electrical and fire mishappenings. Other safety protections include safety from power overload, short circuits, high voltage, and low voltage. The casing also has an automatic temperature-controlled fan to reduce heat after prolonged use.

It’s the pocket rocket to keep you online 24/7.


  • Pure sine wave inverter
  • Super small
  • Quick charging
  • Patented safety guarantee


  • Voltage sometimes drops randomly

7. VOLTWORKS Power Inverter 300W Car Inverter

A modified sine wave power from VOLTWORKS that comes with 2 AC outlets and 2 USB ports of 2.4A for fast charging. The inverter is fitted with a super silent and intelligent fan that starts when the device temperature touches 104℉ or if the power load exceeds 100 watts. 

We love that the inbuilt fan is very silent so it doesn’t interrupt your peace and quiet. The inverter has dual 110V-120V AC to power devices like laptops and tablets and under 300 watts household appliances. It is an ideal device for camping or other outdoor activities where you need power off-grid.

An advanced isolated input and output technology protects the unit from short circuits, overheating, and power overloads.

All the key ingredients in a neat package from Voltworks.

Product Specifications

Item Dimensions: 4.92 x 3.1 x 1.8 inches

Weight: 1.08 Pounds


  • Powerful charging
  • Advanced protection features
  • Super silent and intelligent fan


  • Power cables a little flimsy

8. E-POALR 300W Pure Sine Wave Inverter

This is another is a

pure sine wave inverter converting 12V DC power to 110V AC power. It gives 300 watts of continuous rated power and 600 watts of peak power. 

As it is a pure sine wave inverter it is ideal for current sensitive devices like laptops, curling iron, and LED TVs. Another great advantage of pure sine wave output is that they produce less electrical noise and ensure lesser damage to your devices.

Enjoy the whopping 60W PD USB Type C port to quick charge devices like iPhones, iPads, and MacBooks in a heartbeat. We found it can charge your MacBook Air from 30 to 80% in just 45 minutes!

The dual smart USB ports detect the connected devices and give fast charging speed up to 2.4 amps per port. A very compact and lightweight unit that you can easily carry anywhere and store in the car. Plus, it comes with a detachable power cable for convenient storage. 

Clever design helps in quick heat dissipation while it generates less heat and higher efficiency than competitors. To stay quiet, the cooling fan does not get activated below 100 watts of power output. 

For your safety, it has all the inbuilt protection features against short circuits, power overloads, voltage fluctuations, and overheating. The device is made up of fire-proof UL94 V-0 material and an isolation safety chip for utmost protection and security of your devices. 

Undoubtedly, this is one of the best in class with a full suite of features and design.


  • Pure sine wave inverter
  • Fast and smart charging capability
  • Compact and convenient
  • Smart and silent cooling fan


  • Large size as compared to others

9. FOVAL 300 Watt Inverter

Finally, FOVAL sells a premium inverter that comes with 2 AC outlets and 2 USB ports. The AC outlets is ideal for charging devices like laptops, portable game consoles, TVs, DVD player, and other electronic devices. The dual USB ports can efficiently charge compatible mobile devices simultaneously. 

The inverter comes with 40 amps fuse with complete FCC authentication to provide complete safety from overheating, short circuits, and voltage fluctuations. 

The fabulous design makes it lightweight and compact, just the size of an iPhone. It is space-saving and convenient!

A 30-inch cigarette lighter cable enables easy use for the back seat passengers in your car. Made of a durable metal case, the device is safe from falls and accidental bumps. Adding to this, an integrated cooling fan protects the inverter from overheating and power shortages. An LED light on the inverter shows the working status for simple monitoring.


  • Safe with FCC authentication
  • Ultra compact
  • Lightweight
  • Integrated smart cooling fan


  • Gets hot quickly

Education: Choosing a 300 Watt Inverter

What can 300 watts power?

There’s is a never end list of appliances you could run with 300 watts of power. Generally speaking, these will be portable devices or small home appliances including phones, portable games consoles, wireless headphones, laptops, LED lights, DVD players, mini-fridges, fans, and TVs. 

If you want to know what devices you can power simply check the wattage rating of your device. To run multiple appliances simultaneously, add up the total wattage of all your devices to make sure it is less than 300 watts.

For example, a mini-fridge may draw 40 watts, a phone 6 watts, and LED lights 10 watts. That’s a total of 56 watts, so they would all be able to draw power at the same time.


All inverters come with a number of different outlets, everything we’ve reviewed on the list above comes with a decent choice including AC 3 pin plugs and USB ports. Decide on how many and which electronics you need to run in order to decide on the outlets you need. 

For example, if the whole family will want to charge phones then something with 3 or 4 USB ports will be ideal. If you want to run 2 AC appliances then you’ll need 2 AC outlets. Simple, but important!


Durability is always a factor I consider in any product I buy. The last thing you want is the item to break forcing you to buy another one. It’s even more important if you are going to be relying on your unit regularly. Look for design features like aluminum casing to protect your inverter in the long run.

Adding to this, you should check the manufacturer warranty, 1 year is the minimum to expect to protect you from faults or failures. The top brand often go further with 2 or 3 year warranties which are signs of a high quality product.


As with all electronics, safety is vital. Using poorly built, unreputable brands could result in damage to your devices plus present a fire risk! All the products reviewed above include important protections including guards against short circuits, power overloads, voltage fluctuations, and overheating. Adding to this, the best 300 watt power inverters have smart and silent cooling fans for optimal performance.


One final factor to consider is the ease of installation. Does your chosen product arrive with everything you need to get started? For example, a handy feature is the ability to plug straight into your cigarette lighter or quick alligator clips to connect to your battery. 


So how much does a 300W inverter cost?

Well, prices are pretty reasonable and you can buy a decent unit for between $30 and $60. To be honest, you should think twice about purchasing anything cheaper than this as it is likely to be low quality and not up to the task. For around $40 you can get a high quality device that even offers pure sine wave power to use in your car. There’s also not much point is spending more than $60, this is overkill and you can get a higher-powered inverter for this cost.

Pros and Cons of a 300 Watt Inverter

Still not sure if a 300 watt power inverter is right for you? Let’s go through all the advantages and disadvantages.

Small and portableNot massive capacity for large appliances
Perfect to use in carsToo small for solar panel systems
Enough power to run lots of devicesOften restricted to car use
Pure sine wave options availableRequire a battery to use
Can run home appliances like fans and TVs

FAQ About 300 Watt Power Inverter

How many amps do a 300 watt power inverter use?

Usually, in a normal car, the output is 15 amps maximum. A 300 watt inverter might pull more. Therefore, please check the specification and instructions regarding the amps before plugging in the inverter. This can damage your fuse.

Can I charge multiple devices simultaneously?

Yes, you can. But, the total watt requirement should not be more than 300 watts. Also, check the amp specification before using all the ports simultaneously.

What are smart fans in a 300 watt power inverter?

Inverters can heat up quickly. Therefore, to keep them cool fans are used. Smart fans are the fans that turn on automatically depending upon the temperature of the inverter. They start only if the temperature rises above a set limit and shut off automatically when the temperature is brought down.

Can I charge a car battery with a 300 watt power inverter?

No, inverters are designed to draw power from a battery not charge them. You will need a battery charger to charge your car battery.

Can a 300W inverter run a small fan?

Yes you should easily be able to run a small fan. A device like a 9 inch fan only requires about 30-50 watts.

Will a 300W inverter run a fridge?

You will struggle to run a large home fridge with 300 watts. The inverter will not be able to cope with spikes in power and continuous heavy loads. You could run a mini-fridge that requires much less power.

Final Words On 300 Watt Power Inverters

Well, that was quite a journey, hopefully, made better by your ideal 300 watt inverter!

If you’ve read this far you can consider yourself an expert on the subject after researching the best 300 watt power inverter and the features to consider.

When making your final decision you can’t go far wrong with the list of product reviews above to find a product to fit your needs.

Not satisfied? Then have a read of the 400 watt and 200 watt inverter guides to find some other options.

Thanks for reading.