The 10 Most Efficient Generators Of 2023, Tested By Us

Sara Ryan By, Sara Ryan
Most Efficient Generators
Most Efficient Generators

Our Top Picks

1. Best Overall: Westinghouse 12500 Watt Dual Fuel Home Backup Portable Generator

You will like this product cause it has VFT Data Center that displays voltage output, frequency, and operating hours, keeping you updated with real-time information and scheduled maintenance. Read Review

2. Best For Price: DuroMax XP5500EH Electric Start-Portable Generator

With 5,500 watts starting and 4,500 watts running, this unit can handle heavy loads, from lights and refrigerators to home air conditioners and high-amperage power tools Read Review

3. Best Technology: DuroMax XP13000EH Dual Fuel Portable Generator

The unique thing about this device is it offers performance typically in stationary home standbys but in a portable package. The Dual Fuel Technology gives the ability to run on propane or gasoline, allowing freedom and flexibility in fuel choice. Read Review

4. Best Powerful: Westinghouse 4500 Watt Super Quiet Portable Inverter Generator

This generator features a reliable push-button electric start system that makes starting and stopping the generator a breeze. Moreover, the engine's choke valve works automatically, making it easy to start by pushing a button. Read Review

When choosing a generator that saves fuel and delivers performance, it's worth paying attention to the inverter. Not only are they lightweight and portable, but they're also quiet and use newer technology, allowing them to power sensitive electronics like cell phones or laptop chargers, making them ideal for backup and camping or recreational applications.

The combination of digital conversion and new technology makes variable frequency generators more economical. Their engines tune themselves to produce the power they need, and that's it. So since they're not running at full speed all the time, you can expect to save fuel in the long run.

Our staff had to concentrate on studying over 12 hours to acquire such outcomes for readers. Such research depends on both customer star ratings and interviews with customers about their experience of the product. As a result, We think the Most Efficient Generators are the -top-product. For your convenience, We've included an in-depth buyer's guide and other excellent alternatives to choose the final option.

Our Top Picks

TOP Choice #1 Westinghouse 12500 Watt Dual Fuel Home Backup Portable Generator
Our Score:
Westinghouse Outdoor Power Equipment

This product features two GFCI 120V 5-20R standard household outlets, one transfer switch-ready 120V L14-30R and one RV ready 120/240V 14-50R; all outlets have rubber covers for extra safety

Moreover, it is powered by a solid 457cc Westinghouse 4-stroke OHV engine with durable cast iron sleeves, automatic low oil shut off, and a digital timer. The VFT display gives you real-time voltage output, frequency, and service life updates. Propane provides a cleaner-burning, lower-cost fuel source that can be stored indefinitely while reducing overall engine maintenance. Includes propane hose and regulator.


TOP Choice #2 DuroMax XP5500EH Electric Start-Portable Generator
Our Score:

The generator runs on gasoline or propane, giving you the freedom and flexibility to choose your fuel—low oil shutdown. The DuroMax 224cc OHV engine is a workhorse, providing plenty of power to handle multiple tasks, from powering high-voltage equipment to heavy-duty power tools.

In addition, the DuroMax XP5500EH is designed to be an easy-to-use unit that delivers 5,500 watts of power. The dual-fuel technology allows you to run your generator on gas or liquid propane, giving you the freedom and flexibility to choose your fuel. 

TOP Choice #3 DuroMax XP13000EH Dual Fuel Portable Generator
Our Score:

The XP13000EH is a dual-fuel workhorse powered by a 500cc OHV engine. With 13,000 starting and 10,500 operating watts to meet the most demanding needs.

Furthermore, dual-fuel technology allows the generator to run on propane or gasoline. Its fully featured power panel includes a push-button start and a variety of outlets for maximum compatibility with your application. With 10,500 watts of operating power and up to 13,000 watts of bypass capability, this generator can power essential household items like lights, large appliances, and central air conditioning. 

4 Westinghouse 4500 Watt Super Quiet Portable Inverter Generator
Our Score:
Westinghouse Outdoor Power Equipment

The Westinghouse iGen4500 Inverter Generator is a premium power solution for your portable power needs, whether camping or on the go. Perfect for entertaining or as emergency backup power, this generator features a TT-30R RV Ready outlet, two 20A household outlets, and a built-in USB port.

Furthermore, it's designed for maximum fuel efficiency with variable engine speed, producing only the power you need at any given time and running for up to 18 hours on its 3.4-gallon fuel tank to save you repeated trips to the gas station. 


Champion Power Equipment's 4500 Watt Inverter Generator is ultra-quiet and perfect for camping, tailgates, powering things around your RV, or as backup power for essentials. Champion is all about comfort. With the wireless key fob, you can start and stop the generator quickly from up to 80 feet away.

Besides, the dependable 212cc Champion engine with cold start technology, extended run time, and easy-to-read fuel gauge produces 4500 watts starting and 3500 watts running and runs at 25% load with a whole 2.3 gallon tank14 Hours.




The 4250 Watt Open Frame Inverter Generator from Champion Power Equipment is among the most innovative on the market. Our advanced technology and innovative designs improve the way you move forward. 

Furthermore, this hybrid digital generator is an excellent addition to your RV and a cost-effective power solution. It's smaller, quieter, lighter, and better! The Champion's recoil starter features cold start technology, and the reliable 224cc Champion engine will run for 22 hours at 25% load when the 4-gallon fuel tank is full.

This product is 40% quieter than a Honda* Advanced inverter technology and enclosure design ensure optimal noise performance. It has durable steel housing, clean inverter performance, and portability, making this generator the ideal generator for work or leisure.

Additionally, the intuitive Power Dial integrates start, run and stop functions into one easy-to-use dial and electric start, all conveniently located for faster starts. Depending on your needs, you can choose from two engine speeds to dramatically reduce noise and fuel consumption or maximize dynamic response.

More To Consider

What to Look For in a most efficient generators?

Actually, when you decide to invest in most efficient generators for yourself, lots of things to consider! It's harder to choose since the product comes with many types, functions, and features from different manufacturers. That’s why you should find a reliable space to acquire knowledge related to the item. 

We’ve highlighted the essential features of the most efficient generators below. Along with checking out the list of best models in the list, you should also carefully read the buying guide here:

Automatic Start

Whole home generators can automatically start when power goes out. This allows the generator to automatically start supplying power when there is no electricity from the utility. This feature is usually only available on standby generators, and not portables. These systems can provide peace of mind and may be more expensive than the security that your generator will automatically turn on without interrupting vital systems like heating and cooling.

Fuel Source

Generators are generally powered by either gasoline, natural gas or propane.
The majority of portable generators run on gasoline and can generally keep fridges and lights running for several hours. These generators can't be relied upon for long-term power backups, such as when there is no electricity for several days.
Propane and natural gas are used more often for large home-standby generators. These fuels can be used for larger home standby generators as they are cleaner-burning and offer on-demand power.
Solar or battery-powered power sources are an alternative to traditional fuel-powered generators. These machines have different capabilities, and their run time can vary widely. However, they might be the best match for you if your power requirements are less than minimal. They are typically used for camping only, not home.


A warranty is usually included with the purchase of a generator. The warranty covers both labor and parts for most residential inverter and portable generators. For standby generators which can be larger investments, you will usually get a 3- to 52023 warranty period.
Certain warranties may also include travel expenses for technicians to visit the generator and fix it. However, this depends on which manufacturer you are using.


A generator's wattage is the measure of its ability to provide power for whatever it plugs into. This information is crucial to understand about any generator that you are considering.
However, this number does not represent the entire picture. Wattage is made up of three parts: power needed to turn on an appliance and power required to maintain it running. It also includes power necessary to sustain a power surge, which is when regular juice returns to normal and all appliances start to work again. Many appliances use more power for startup than their run energy consumption. You could overload your generator when you turn on appliances and other devices. If the generator can't provide enough power, it could overload. You need to know how many watts your generator can generate, depending on whether it is powering just one item or the whole house.
An increase in generator costs is generally associated with a higher wattage. Most people agree that it's better to have enough power than not to be able to run your fridge or keep cool by a fan.


You need to decide which generator type is best for you: a portable or standby generator. This will help you decide if you just want the lights to stay on or if you need to power other electrical components such as the refrigerator, window, central air conditioner, and the fridge.


Installing home generators requires space. So make sure that you consider the dimensions of all models. You can find generators in a variety of sizes, from smaller units measuring less than 3ft to more large units measuring 5ft or more. A general rule of thumb is that the generator with the highest power rating will be larger.
Be aware that the clearance between your home and generator may be determined by local codes or model specifications. A small generator may require only 18 inches of clearance.


Where Is The Best Place To Put Your Home Generator?

Natural gas generators do not produce as much fumes than natural gas ranges. Gasoline-powered generators can produce carbon monoxide exhaust fumes, which is why it's important to select the ideal location. These are the reasons why utility companies and local codes often have specific requirements for placement.
A generator should generally be located at least 5ft from any windows or doors. While some generators are able to be mounted as close as 18inches from the house, it is still important that the generator is at least 5ft away from any air intake areas on the property.
It is not advisable to use portable generators in an indoor environment, such as a garage. This type of generator is best placed outdoors, away from windows and doors.

Can I Use The Generator During Inclement Weather?

Although you can use your generator in any weather or temperature, protect it from the elements whenever it is not being used to stop it from shorting out and rusting. It is not recommended to run the generator indoors.

Does The Portable Generator Need To Be Grounded?

Yes. It is important that the generator be correctly grounded in order to protect your safety. The generator must be grounded properly to avoid electrocution. Grounding is a subject matter that must be adhered to by all authorities, federal and state.

What Regular Maintenance Should Be Performed On A Home Generator?

You should get basic maintenance information from the manufacturer of any generator that you buy. However, most generator models will work fine if you follow these guidelines.
Run the generator at least 30 minutes per month or perform a weekly self test
When storing a gasoline-powered generator, add fuel stabilizer.
Regular oil changes are a must for your generator.

Can I Vent The Exhaust Out Of An Enclosed Area?

No. The generator should not be used in enclosed areas or homes. The portable generators can only be run outdoors where there is adequate ventilation. As with all gasoline engines exhaust, generators contain poisonous carbon monoxide.

How Do You Safely Run A Home Generator?

A whole-home generator or standby generator must be connected to a switch. This disconnects your circuit panel and the electrical grid, allowing power to flow through the circuits from the generator.
You must manually start the power transfer for portable generators. These products have different safety requirements.

After knowing the suitable kinds of most efficient generators and the features you wish, it’s high time for you to start your shopping. Note that you shouldn’t run out to a particular store or start scrolling through online sales just yet. With the development of technology, especially the expansion of sale sites, you can easily find your buddy. 

Remember to check out our site weekly round-up to ensure that the current sales on most efficient generators perform well in our tests. So you can catch up with them as soon as possible. Would you please give us your feedback for better service? Many thanks!

0 ratings

About Sara Ryan

Sara Ryan

Sara Ryan is a freelance writer for CampFireHQ and avid diver. She first discovered her love for diving while on vacation in the Caribbean and has been hooked ever since. Sara loves exploring new dive sites and observing the fascinating creatures that live beneath the waves. As a native of Colorado, Sara enjoys spending her free time hiking and camping in the beautiful Rocky Mountains. She also enjoys writing about her adventures in diving and wildlife conservation.

Read Sara's full bio