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Fuel Efficient Generator

10 Best Fuel Efficient Generator 2025 in the United States

#1

Winner

10.0 score

Westinghouse 28000 Peak Watt Tri-Fuel Home Backup Portable Generator, Remote Electric Start, Transfer Switch Ready, Gas, Propane, and Natural Gas Powered

Westinghouse 28000 Peak Watt Tri-Fuel Home Backup Portable Generator, Remote Electric Start, Transfer Switch Ready, Gas, Propane, and Natural Gas Powered

Westinghouse

10.0 score

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The Westinghouse 28000 Peak Watt Tri-Fuel Generator is a powerful option designed mainly for larger homes needing reliable backup power. Its standout feature is the tri-fuel capability, meaning it can run on gasoline, propane, or natural gas, giving you flexibility depending on fuel availability or cost. It delivers substantial power, with 28,000 peak watts on gas and solid running watts across all fuels, which is enough to keep your essential home systems and many appliances running during outages.

Rating
10.0
Chosen by1,482
Fuel Type
Wattage
Fuel Efficiency

Most important from
246 reviews

Fuel Type
Its tri-fuel capability offers great flexibility, allowing seamless switching between gasoline, propane, and natural gas depending on availability.
Wattage
This generator is a powerhouse that can handle an entire home effortlessly, including heavy loads like a 5-ton AC and 220-volt appliances.
Fuel Efficiency
Fuel efficiency is promising, especially when using propane or natural gas to avoid carbon buildup and extend engine life.
Noise Level
While it’s somewhat loud, the noise level is acceptable given the massive power output it provides.
Portability
Built with a sturdy frame and equipped with solid never-flat wheels, it’s heavy but still manageable with proper preparation or assistance.
#2
9.4 score

Generac 9,400 Starting Watt Dual Fuel Portable Generator - Electric Start - Gas or Propane Powered - Home Backup or Jobsite - Quiet, Long Runtime, Emergency Power - 49-State Compliant

5%OFF

Generac 9,400 Starting Watt Dual Fuel Portable Generator - Electric Start - Gas or Propane Powered - Home Backup or Jobsite - Quiet, Long Runtime, Emergency Power - 49-State Compliant

Generac

9.4 score

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The Generac 8011 GP7500E is a robust dual-fuel generator capable of running on both gasoline and propane, offering flexibility in fuel choice. With a running wattage of 7500 Watts and a starting wattage of 9400 Watts, it is powerful enough to handle heavy electrical loads, making it suitable for both emergency power and recreational use. The PowerRush Advanced Technology enhances its starting capacity, which is a significant advantage for demanding applications.

Rating
9.4
Fuel Type
Portability

Most important from
234 reviews

Fuel Type
Easy to use and maintain with non-ethanol fuel and regular oil changes.
Portability
Starts easily and is simple to move around thanks to large wheels.
#3
9.1 score

Honda 664240 EU2200i 2200 Watt Portable Inverter Generator with Co-Minder

9%OFF

Honda 664240 EU2200i 2200 Watt Portable Inverter Generator with Co-Minder

Honda

9.1 score

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The Honda 664240 EU2200i 2200 Watt Portable Inverter Generator is a highly reliable option for those seeking fuel efficiency and quiet operation. It uses gasoline, which is readily available, and offers a maximum output of 2200 watts, making it suitable for a variety of applications, including camping, home use, and job sites.

Rating
9.1
Wattage
Fuel Efficiency
Noise Level

Most important from
2060 reviews

Wattage
Versatile 2200-watt output, powerful enough for outdoor activities and emergency power needs.
Fuel Efficiency
Fuel efficient, running up to 8 hours on a single gallon of gas, providing reliable power during extended use.
Noise Level
Quiet operation makes it suitable for use in campsites and other noise-sensitive environments.
Portability
Compact and relatively lightweight, making it easy to transport and set up wherever needed.
Inverter Technology
Inverter technology ensures clean and stable power, crucial for sensitive electronics.

Top 10 Best Fuel Efficient Generator 2025 in the United States

#1

Winner

10.0  score
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Westinghouse

Westinghouse 28000 Peak Watt Tri-Fuel Home Backup Portable Generator, Remote Electric Start, Transfer Switch Ready, Gas, Propane, and Natural Gas Powered

Fuel Type: Gasoline, Propane, Natural Gas
Wattage: 28000 watts
Fuel Efficiency: Up to 13 hours at 25% load
Portability: Large wheels, foldable handles, 557 lbs
Runtime: Up to 13 hours at 25% load

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Chosen by 1482 this week

#2
9.4  score
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Generac

Generac 9,400 Starting Watt Dual Fuel Portable Generator - Electric Start - Gas or Propane Powered - Home Backup or Jobsite - Quiet, Long Runtime, Emergency Power - 49-State Compliant

Fuel Type: Gasoline, Propane
Wattage: 7500 Watts
Portability: 204 pounds
Runtime: 110 hours

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5% OFF
#3
9.1  score
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Honda

Honda 664240 EU2200i 2200 Watt Portable Inverter Generator with Co-Minder

Fuel Type: Gasoline
Wattage: 2200 watts
Fuel Efficiency: 4.0 to 9.6 hours per tank
Noise Level: 48 to 57 dBA
Portability: 46.5 lbs, 19"L x 12"W x 21"H
Runtime: 9 hours
Inverter Technology: Yes

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9% OFF
#4
7.9  score
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WEN

WEN 14500-Watt 120V/240V Tri-Fuel Generator, Transfer-Switch Ready with Electric Start and Wheel Kit (TF1450)

Fuel Type: Gasoline, Propane, Natural Gas
Wattage: 14500
Portability: 249 pounds, Wheel Kit
Runtime: 12 hours at half-load
Inverter Technology: No

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15% OFF
#5
7.9  score
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DuroMax

DuroMax XP13000EH 13,000-Watt Dual Fuel Portable Generator - Gas & Propane, Electric Start, Whole Home Backup Power, Transfer Switch Ready, RV & Emergency Ready

Fuel Type: GASOLINE / PROPANE
Wattage: 13000 watts
Portability: Portable

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33% OFF
#6
7.9  score
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Westinghouse

Westinghouse 13500 Peak Watt Tri-Fuel Home Backup Portable Generator, Remote Electric Start, Transfer Switch Ready, Gas, Propane, and Natural Gas Powered

Fuel Type: Gasoline, Propane, Natural Gas
Wattage: 13500 watts
Portability: 230 pounds
Runtime: 19 hours

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#7
7.6  score
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Westinghouse

Westinghouse 14500 Peak Watt Tri-Fuel Home Backup Portable Generator, Remote Electric Start, Transfer Switch Ready, Gas, Propane, and Natural Gas Powered

Fuel Type: Gasoline, Natural Gas, LPG
Wattage: 14500 watts
Runtime: 19 hours

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#8
7.6  score
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Westinghouse

Westinghouse 12500 Watt Dual Fuel Home Backup Portable Generator, Remote Electric Start, Transfer Switch Ready, Gas and Propane Powered

Fuel Type: electric
Wattage: 12500 watts
Runtime: up to 12 hours

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#9
7.3  score
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Westinghouse

Westinghouse 13500 Peak Watt Dual Fuel Home Backup Portable Generator, Remote Electric Start, Transfer Switch Ready, Gas and Propane Powered

Fuel Type: Gasoline, LPG
Wattage: 13500 watts
Portability: 230 pounds
Runtime: 19 hours

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9% OFF
#10
7.0  score
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WEN

WEN Quiet 6800-Watt Dual Fuel RV-Ready Electric Start Portable Inverter Generator with Fuel Shut Off and CO Watchdog for Electric Vehicle Backup (DF680iX)

Fuel Type: Gasoline, Liquefied Petroleum Gas
Wattage: 5100 watts
Portability: onboard wheels, telescoping handle
Runtime: 6 hours
Inverter Technology: yes

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Buying Guide for the Best Fuel Efficient Generator

Choosing a fuel-efficient generator can be a great investment, especially if you need a reliable power source for emergencies, outdoor activities, or even for your home or business. The key to selecting the right generator is understanding the various specifications and how they align with your specific needs. Here are some important specs to consider when choosing a fuel-efficient generator.
Fuel TypeGenerators can run on different types of fuel such as gasoline, diesel, propane, or natural gas. The type of fuel affects the generator's efficiency, cost of operation, and availability. Gasoline is widely available but less efficient and has a shorter shelf life. Diesel is more efficient and has a longer shelf life but can be more expensive. Propane is clean-burning and has an indefinite shelf life but requires a storage tank. Natural gas is convenient if you have a gas line but is less portable. Choose the fuel type based on availability, cost, and your specific needs.
WattageWattage indicates the amount of power a generator can produce. It's important to determine your power needs by adding up the wattage of all the devices you plan to run simultaneously. Generators are rated by starting (surge) watts and running (continuous) watts. Starting watts are higher and account for the initial power surge needed to start appliances. Running watts are the continuous power the generator can supply. Choose a generator with a wattage rating that exceeds your total power needs to ensure reliable performance.
Fuel EfficiencyFuel efficiency measures how long a generator can run on a specific amount of fuel. This is usually expressed in terms of run time at a certain load (e.g., half load). A more fuel-efficient generator will run longer on the same amount of fuel, saving you money and reducing the frequency of refueling. Look for generators with features like eco-mode or variable engine speed, which adjust the power output based on the load to improve fuel efficiency. Choose a generator with good fuel efficiency to minimize operational costs and maximize convenience.
Noise LevelThe noise level of a generator is measured in decibels (dB) and indicates how loud the generator will be during operation. Lower noise levels are important for comfort, especially if you plan to use the generator in residential areas or during outdoor activities. Generators with noise levels below 60 dB are considered quiet and are suitable for most applications. Choose a generator with a noise level that won't disturb you or your neighbors, especially if you plan to use it in noise-sensitive environments.
PortabilityPortability refers to how easy it is to move the generator. This is influenced by the generator's weight, size, and design features like wheels and handles. If you need a generator for camping, tailgating, or other outdoor activities, a lightweight and compact model with wheels and handles will be easier to transport. For home or business use, portability may be less critical, but consider how you will move the generator for maintenance or storage. Choose a generator with the right balance of portability and power for your intended use.
RuntimeRuntime indicates how long a generator can operate on a full tank of fuel. This is usually given for a specific load, such as half load. Longer runtimes mean fewer interruptions for refueling, which is especially important during extended power outages or when using the generator for long periods. Consider your typical usage scenarios and choose a generator with a runtime that meets your needs. For example, if you need a generator for overnight use, look for one with a runtime of at least 8-10 hours at half load.
Inverter TechnologyInverter generators produce clean and stable power, making them suitable for sensitive electronics like laptops, smartphones, and medical devices. They are also typically more fuel-efficient and quieter than conventional generators. Inverter technology adjusts the engine speed to match the power demand, improving efficiency and reducing noise. If you need to power sensitive electronics or value quiet operation and fuel efficiency, consider choosing an inverter generator.

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