A diesel generator is the combination of a diesel engine with an electric generator (often an alternator) to generate electrical energy. This is a specific case of engine-generator. A diesel compression-ignition engine is usually designed to run on diesel fuel, but some types are adapted for other liquid fuels or natural gas.

Diesel generating sets are used in places without connection to a power grid, or as emergency power-supply if the grid fails, as well as for more complex applications such as peak-lopping, grid support, and export to the power grid.

Inverter generators have many advantages over conventional generators. They offer quiet operation, clean power, low fuel consumption, and above all they are very portable and lightweight.

Due to their quiet operation, they can be used in camping, RV, fishing as well as many other outdoor activities. That being said, if you are looking for such a generator then you have come to the right place.

The Best Inverter Generator 2021

  1. Champion 4000-Watt Open Frame Inverter Generator

Champion is in the business of making generators for quite a while now, and I must say I am impressed by their products. We have selected the Champion 4000-Watt generator to be our number one pick for the best inverter generator because of its decent power output and affordable price range.

First of all, this inverter generator is not compact and portable like others because it uses the open frame style design, which is the reason for its high power output.

Speaking of power output, this generator can deliver 4000 starting watts and 3500 running watts, which is enough to run almost all of your home appliances.

Moving on, it has a 2.9-gallon fuel tank, and on a full gas tank, you can expect about 17 hours of runtime on a 25% load, which is pretty decent.

Please note that this generator does not have wheels, and it weighs about 96.8 pounds, so it may become hard for you to move around this generator. Well, there is a solution to this problem too; there is a separate wheel kit on the sale for this particular generator.

What’s more, it has many noteworthy features, such as parallel capability, RV port, and economy mode. This generator is not quiet as other inverter generators, but considering its price range, I would say this is negotiable.

Other than that, the generator boasts 4 output ports, including one 120V 3A RV ready port, two 120V 20A household outlets, and one 12V DC outlet, and let’s not forget the dual USB adapter that comes with the whole package.


  1. Champion 6250-Watt Open Frame Inverter Generator

If you are fond of inverter generators and want to run many appliances in your home simultaneously, then the champion 6250-watt generator is what you need.

As you know, the inverter generators are designed to be portable and lightweight, and that is why their power output is low, but that is not the case with Champion 6250-Watt generator.

This generator can produce massive 5000 watts of running power output and 6250 starting watts, and due to high power output, you can use this generator as a home backup too.

When its 4 gallons fuel tank is full, the generator can run about 12.5 hours at 25% load until you need to refuel the generator. One of the biggest advantage of using the inverter generator is its clean power, and this generator no exception.

Using this generator, you can get as clean as less than 3% THD (Total Harmonic Distortion), which is essential when you want to run sensitive electronic devices.

  1. WEN 56202i 2000-Watt Portable Inverter Generator

According to its power output, the WEN 56202i is one of the lightest and cheapest inverter generators we have seen so far.

Thanks to its EPA III and CARB-Compliant 4-Stroke engine, this generator can produce 2000 surge watts and 1700 running watts. Due to its lightweight and compact design, this generator is perfect for camping and other outdoor activities.

Additionally, it is fitted with various output receptacles such as two three-prong 120V receptacles, one 12V DC receptacle, and two 5V USB ports for the user’s convenience.

There are three different indicator lights on the panel that will notify you about low oil level, overload condition, and output. You will love the eco-mode of this generator that will help you maximize fuel economy and runtime.

If you feel like you need more clean power from this generator, then you can connect another same generator in parallel with this and can get higher power output. Please note that the parallel kit is not included in the whole package, and you have to purchase it separately.

What I find amusing about this generator is its less than 1.2% THD clean power output, which can handle even the most sensitive electronic devices. You may not know this, but clean power reduces the heating in any electronic device, and thus, its life expectancy also increases

  1. Westinghouse iGen4500DF Dual Fuel Inverter Generator

If you want to enjoy the luxury of dual-fuel capability in your inverter generator, then you should check out the Westinghouse iGen4500DF dual fuel inverter generator.

There are barely 3-4 inverter generators are on the market that comes with dual fuel capabilities. As you know, there is no generator that comes with only propane fuel setup, but instead, it comes with a gasoline setup too, so that is why it is called the dual fuel generator.

It’s true that the initial cost of this generator is very high, but as you know, propane is very cheap and fuel-efficient compared to gasoline. So by using the propane in your generator, you will save a great deal of money on fuel costs.

  1. Honda EU2200i 2200-Watt Portable Inverter Generator

Honda is an undisputed king of the generator industry and despite its high price range, most people prefer Honda’s generator for greater reliability and clean power output. Depending on your load demand, the generator will give you about 4 to 9.6 hours of runtime on a full gas tank.

This inverter generator also happens to be the quietest generator, and the credit goes to its internal engine and sound dampening materials. And the noise operating range is 48 to 57 dBA which is equal to the average conversation.

Need more power? Connect the other EU2200i generator with this and double the power output. Thanks to Honda’s exclusive Eco-throttle system, it offers excellent fuel-efficiency.

That’s not all, this improved generator gives you better performance and also the maintenance is easy too. In addition to that, the fuel shut off valve allows you to run the generator with fuel supply off, which helps in preventing the issues related to fuel stale, large spout, and oil drain.


The inverter generators have made life a whole lot easier. It is a handy machine for those who like clean and stable power output (which contains less THD) and using this generator; you can easily run sensitive electronic devices such as modern TVs, smartphones, laptops, tablets, gimbal and much more. This generator is also useful for people who don’t like noise, such as when they host a party, or camping, or living in a neighborhood where noise is restricted. Other than that, RVers also love the inverter generator because of its convenience and high-end features.

Features that make the inverter generator superior to a conventional generator

Not sure why you should choose the inverter generator over a conventional generator; read this and know what is best for you.

  1. Compact size:

As you know, almost all the inverter generators are compact and portable because they are designed to be that way; however, there are some exceptions. As the wattage rating increases, be it a conventional generator or inverter generator, the size of the generator is definitely going to increase. But still, the inverter generators are substantially portable and lightweight than any normal generator on the market.

  1. Less Weight

Any typical inverter generator rated below 4000 watts will max out at 80 pounds and but most of them are still lighter. In all of them, the open frame style inverter generators are heavy, but on the other hand, they deliver great power output, so it is a great trade-off.

  1. Higher fuel efficiency

The inverter generator uses a combination of an advanced load monitoring system and inverter technology that adjusts the power output according to your power requirement, which makes it very fuel-efficient. You will not get these features in a conventional or non-inverter generator.

  1. Less Noise

Noise output is the biggest difference between the inverter generator and a conventional generator. Any inverter generator will produce about 50 to 60 decibels of noise at max, whereas the conventional generator will produce 62-70 decibels of noise, which is considered to be loud. If you are not familiar with levels of noise, then first you need to know how many decibels can be loud for you.

  1. Clean Power

As the load increases, the rotor tries to keep up with the load, and in the process, the speed of the rotor fluctuates, which results in lots of dips and surges in power output. Thus the power produced by any non-inverter generator consists of modified sine waves. But in the case of an inverter generator, it produces clean and stable power, and the reason is its inner workings.

  1. Parallel capability

Parallel capability is a pretty common feature in all the inverter generators. Suppose you want a portable generator for outdoor activities, but sometimes if you need more power, then buying a big generator is not an option. At that time, you can connect another same generator in parallel with this inverter generator and double the power output. So it is a very convenient feature which you will ever see in other generators.


Most of the inverter generators come with only one fuel option, which is gasoline, and to use the propane in your generator, you may require additional parts, not all the inverter generator uses propane. If you want an inverter generator that uses propane, propane is cheaper and has high fuel efficiency and above all, it produces less harmful gases.