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9 Best Natural Gas Backup Generators 2025 in the United States

#1

Winner

9.9 score

Generac Guardian 14kW Home Standby Generator with 200 Amp Transfer Switch, Durable All Aluminum, WiFi Enabled with G-Force Engine, Easy to Use, Whole House Power Backup, Smart Outage Solution - Bisque

10%OFF

Generac Guardian 14kW Home Standby Generator with 200 Amp Transfer Switch, Durable All Aluminum, WiFi Enabled with G-Force Engine, Easy to Use, Whole House Power Backup, Smart Outage Solution - Bisque

Generac

9.9 score

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The Generac Guardian 14kW Home Standby Generator with a 200 Amp Transfer Switch is a robust solution for whole-house power backup. This generator provides a high-quality power output of 14,000 watts, delivering clean and stable energy with less than 5% harmonic distortion, making it reliable for sensitive electronics. The G-Force engine is designed for durability and reduced maintenance, ensuring long-term reliable performance.

Rating
9.9
Chosen by1,361
Power Output (Wattage)
Noise Level
Automatic Transfer Switch (ATS)

Most important from
431 reviews

Power Output (Wattage)
It's a bit noisy, especially when standing nearby, but it effectively powers large appliances like two 5-ton AC units simultaneously.
Noise Level
It's a bit noisy, especially when standing nearby, but it effectively powers large appliances like two 5-ton AC units simultaneously.
Automatic Transfer Switch (ATS)
The generator kicks in within seconds during power outages, providing seamless electricity to the entire house.
Size and Portability
Despite its weight, installation is straightforward, but you'll likely need a permitted electrician for the final hookup.
#2
9.8 score

Generac Guardian 10kW Home Standby Generator with 100 Amp Transfer Switch, Durable All Aluminum, WiFi Enabled with G-Force Engine, Easy to Use, Whole House Power Backup, Smart Outage Solution - Bisque

10%OFF

Generac Guardian 10kW Home Standby Generator with 100 Amp Transfer Switch, Durable All Aluminum, WiFi Enabled with G-Force Engine, Easy to Use, Whole House Power Backup, Smart Outage Solution - Bisque

Generac

9.8 score

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The Generac Guardian 10kW Home Standby Generator is a robust solution for those seeking reliable whole-house power backup. Its 10,000-watt power output is sufficient for most residential needs, providing clean and stable power with less than 5% harmonic distortion. This ensures that sensitive electronics and appliances are safely powered during an outage. The included 100 Amp automatic transfer switch (ATS) allows for seamless switching when power is lost, enhancing convenience and security during blackouts.

Rating
9.8
Power Output (Wattage)
Noise Level
Automatic Transfer Switch (ATS)

Most important from
431 reviews

Power Output (Wattage)
The generator is too loud to converse next to it while running, but it managed to run both 5-ton AC units and all normal house parts during summer testing.
Noise Level
The generator is too loud to converse next to it while running, but it managed to run both 5-ton AC units and all normal house parts during summer testing.
Automatic Transfer Switch (ATS)
The generator kicked off and ran just fine during unexpected power outages, automatically turning off once power was restored. A very happy customer.
Size and Portability
Solid, heavy-weight home generator that works as described. Installation is straightforward for those with some background, but most buyers will need a permitted electrician for the final hookup.
#3
9.6 score

DuroMax XP13000HXT 13,000-Watt 500cc Tri Fuel Gas Propane Natural Gas Portable Generator with CO Alert, Black/Blue

20%OFF

DuroMax XP13000HXT 13,000-Watt 500cc Tri Fuel Gas Propane Natural Gas Portable Generator with CO Alert, Black/Blue

DuroMax

9.6 score

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The DuroMax XP13000HXT 13,000-Watt Tri Fuel Generator offers impressive power output at 13,000 watts, making it suitable for both residential and commercial use. This high wattage ensures it can handle the energy demands of an entire home during a power outage. The tri-fuel capability allows the generator to run on gasoline, propane, or natural gas, offering flexibility and convenience based on fuel availability and preference. Equipped with a powerful 500cc engine, it promises reliable performance. The generator's electric start and remote start features add ease of use, eliminating the need for manual pull-starting.

Rating
9.6
Fuel Consumption
Noise Level
Size and Portability

Most important from
374 reviews

Fuel Consumption
Running on natural gas is convenient, eliminating the need to store gasoline or propane.
Noise Level
Noise levels are manageable considering the powerful 500cc engine.
Size and Portability
Despite its weight, the handles and wheels make it easy to move.

Top 9 Best Natural Gas Backup Generators 2025 in the United States

Sponsored

Slide 1

Jackery

Jackery Explorer 3000 Pro Solar Generator + Manual Transfer Switch, 3024Wh 3000W Portable Power Station with 2 * 200W Solar Panels, up to 3kW Plug & Play Home Backup Power

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45% OFF
#1

Winner

9.9 score

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Generac

Generac Guardian 14kW Home Standby Generator with 200 Amp Transfer Switch, Durable All Aluminum, WiFi Enabled with G-Force Engine, Easy to Use, Whole House Power Backup, Smart Outage Solution - Bisque

Power Output (Wattage): 14000
Automatic Transfer Switch (ATS): Yes
Size and Portability: 48"L x 25"W x 29"H, 385 lbs
Maintenance Requirements: Reduced maintenance

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10% OFF

Chosen by 1361 this week

Sponsored

Slide 1

Jackery

Jackery Explorer 3000 Pro Solar Generator + Manual Transfer Switch, 3024Wh 3000W Portable Power Station with 2 * 200W Solar Panels, up to 3kW Plug & Play Home Backup Power

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45% OFF
#2

9.8 score

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Generac

Generac Guardian 10kW Home Standby Generator with 100 Amp Transfer Switch, Durable All Aluminum, WiFi Enabled with G-Force Engine, Easy to Use, Whole House Power Backup, Smart Outage Solution - Bisque

Power Output (Wattage): 10000 watts
Automatic Transfer Switch (ATS): 100 Amp
Size and Portability: 338 Pounds
Maintenance Requirements: low-maintenance

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10% OFF
#3

9.6 score

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DuroMax

DuroMax XP13000HXT 13,000-Watt 500cc Tri Fuel Gas Propane Natural Gas Portable Generator with CO Alert, Black/Blue

Power Output (Wattage): 13000 watts
Run Time: 8 hours
Noise Level: 74 dB
Size and Portability: 30"L x 30"W x 26"H, 240 lbs
Maintenance Requirements: Regular checks necessary

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20% OFF
#4

9.4 score

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Champion Power Equipment

Champion Power Equipment 9000-Watt Electric Start Tri Fuel Home Backup Portable Open Frame Inverter Generator with Quiet Technology and CO Shield

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27% OFF
#5

9.1 score

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Westinghouse

Westinghouse 12500 Peak Watt Tri-Fuel Home Backup Portable Generator, Remote Electric Start, Transfer Switch Ready, Gas, Propane, and Natural Gas Powered

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8% OFF

Related Products

Up to 45% off

#6

8.8 score

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KOHLER

20kW Standby Generator with 200amp TS

Power Output (Wattage): 20 Kilowatts
Automatic Transfer Switch (ATS): 200 Amp
Size and Portability: 47"L x 26.2"W x 32.2"H
Maintenance Requirements: Hydraulic valve lifters

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#7

8.5 score

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Champion Power Equipment

Champion Power Equipment 201222 22 kW aXis Home Standby Generator with 200A Whole House Switch

Power Output (Wattage): 22000 watts
Noise Level: 67 dBA
Automatic Transfer Switch (ATS): 200A Whole House Switch
Size and Portability: 711 pounds, not portable
Maintenance Requirements: self-diagnostic, routine checks necessary

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#8

8.2 score

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Champion Power Equipment

Champion Power Equipment 10,000-Watt Electric Start Tri-Fuel Home Backup Portable Generator with CO Shield

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#9

7.9 score

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KOHLER

10kW Standby Generator with 12 circuit TS

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Buying Guide for the Best Natural Gas Backup Generators

Choosing the right natural gas backup generator is crucial to ensure you have a reliable power source during outages. The right generator will depend on your specific needs, including the size of your home, the essential appliances you need to power, and how long you expect to be without electricity. Here are some key specifications to consider when selecting a natural gas backup generator, along with explanations to help you make an informed decision.
Power Output (Wattage)Power output, measured in watts (W), indicates how much electricity the generator can produce. This is important because it determines how many and what types of appliances you can run simultaneously. Generators typically range from 5,000 to 20,000 watts. For small homes or essential appliances, a generator with 5,000 to 7,500 watts may suffice. For larger homes or to power more appliances, consider a generator with 10,000 to 20,000 watts. Assess your power needs by listing the wattage of essential appliances and adding them up to find the right generator size for you.
Fuel ConsumptionFuel consumption refers to how much natural gas the generator uses per hour of operation. This is important for understanding the operational cost and ensuring you have a sufficient gas supply. Fuel consumption is usually measured in cubic feet per hour (cfh). Lower consumption rates are more efficient and cost-effective. To choose the right one, consider how long you expect to run the generator during an outage and ensure your natural gas supply can meet this demand.
Run TimeRun time indicates how long the generator can operate continuously before needing maintenance or refueling. This is crucial for planning during extended power outages. Generators with longer run times are more convenient and require less frequent attention. Run times can vary from a few hours to several days. Choose a generator with a run time that matches the typical duration of power outages in your area and your ability to perform maintenance.
Noise LevelNoise level, measured in decibels (dB), indicates how loud the generator is during operation. This is important for comfort and compliance with local noise regulations. Generators can range from 50 dB (quiet) to over 80 dB (loud). If you live in a densely populated area or have close neighbors, a quieter generator (50-60 dB) is preferable. For more isolated locations, noise may be less of a concern, allowing for a louder generator if it meets other needs.
Automatic Transfer Switch (ATS)An Automatic Transfer Switch (ATS) automatically switches the power supply from the grid to the generator during an outage. This is important for convenience and ensuring a seamless transition without manual intervention. Some generators come with an ATS, while others require a separate purchase. If you want hassle-free operation and immediate power restoration, choose a generator with an ATS or ensure compatibility with one.
Size and PortabilitySize and portability refer to the physical dimensions and ease of moving the generator. This is important for installation and storage. Larger generators typically offer more power but require more space and may be harder to move. Smaller, portable generators are easier to store and transport but may offer less power. Consider the available space for installation and whether you need to move the generator frequently when choosing the right size.
Maintenance RequirementsMaintenance requirements include the frequency and type of upkeep needed to keep the generator running smoothly. This is important for ensuring long-term reliability and performance. Some generators require regular oil changes, filter replacements, and inspections. Choose a generator with maintenance requirements that you can manage, or consider a model with lower maintenance needs if you prefer less frequent upkeep.

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