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8 Best Natural Gas Backup Generators 2025 in the United States

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Our Top Picks

#1

Winner

Generac 7225 14kW Air Cooled Guardian Series Home Standby Generator with 200-Amp Transfer Switch - Comprehensive Protection - Smart Controls - Versatile Power - Wi-Fi Connectivity - Real-Time Updates

Rating
9.9
Chosen by1,422
Power Output (Wattage)
Noise Level
Automatic Transfer Switch (ATS)

Most important from
434 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.

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.

The aluminum enclosure enhances its durability for outdoor use, while the Wi-Fi connectivity feature allows remote monitoring, adding convenience for users to track performance and maintenance needs remotely. Additionally, it comes with a 5-year limited warranty, offering peace of mind regarding its longevity and performance. The automatic transfer switch ensures a seamless transition during power outages, maintaining continuous power supply without manual intervention.

The generator weighs 385 pounds, making it less portable and more suitable for permanent installation, typically requiring professional installation by a licensed electrician. It operates quietly with features like automatic idle control and a fully enclosed design. As it runs on natural gas or LP gas, fuel consumption and run time can vary based on usage, but its efficient engine design suggests lower fuel use. This generator is ideal for homeowners seeking a reliable, low-maintenance solution for comprehensive home backup power.

Rating
9.9
Chosen by1,422
Power Output (Wattage)
Noise Level
Automatic Transfer Switch (ATS)

Most important from
434 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

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

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

Most important from
434 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.

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.

The generator’s G-Force Engine is designed for durability and reduced maintenance, making it a low-maintenance option over time. Additionally, its aluminum enclosure provides protection against the elements, further ensuring long-term reliability. One standout feature is its Wi-Fi connectivity, which allows you to monitor its performance remotely via the Generac Mobile Link app. This can be particularly useful for staying informed about maintenance needs and generator status when you’re away from home.

Despite its many strengths, there are some considerations to keep in mind. At 338 pounds, this generator is quite heavy, making portability difficult. It’s designed for stationary installation rather than frequent movement. Also, while it is marketed as 'super quiet,' noise levels can still be noticeable, especially at night. Another point to consider is the initial cost and the need for professional installation, which can add to the total expense. The 5-year limited warranty provides additional peace of mind, covering various potential issues. This generator is ideal for homeowners who want a dependable, high-quality backup power solution and are willing to invest in professional setup and occasional maintenance.

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

Most important from
434 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

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

Rating
9.7
Fuel Consumption
Noise Level
Size and Portability

Most important from
363 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.

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.

Additionally, the front-facing interface allows for quick fuel type changes, enhancing user convenience. The CO Alert feature is a significant safety addition, protecting users from harmful fumes. With a noise level of 74 dB, it may be louder than some quieter models, which is a consideration for those in noise-sensitive environments. At 240 pounds, it is relatively heavy, yet the included wheel and handle kit aids mobility. The unit is sizable, so it requires sufficient storage space. Maintenance is manageable with the provided tools, although regular checks are necessary to maintain optimal performance.

One notable absence is the automatic transfer switch (ATS), which would have allowed for seamless switching during power outages. The generator runs for approximately 8 hours, which is decent but may require refueling for longer outages. Overall, the DuroMax XP13000HXT is a robust, versatile generator that excels in power output and fuel flexibility but may be less ideal for those needing a quieter, more compact solution with automatic transfer switching.

Rating
9.7
Fuel Consumption
Noise Level
Size and Portability

Most important from
363 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.

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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