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10 Best Standby Generators 2025 in the United States

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Our technology thoroughly searches through the online shopping world, reviewing hundreds of sites. We then process and analyze this information, updating in real-time to bring you the latest top-rated products. This way, you always get the best and most current options available.

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Our Top Picks

#1

Winner

Generac Guardian 22kW Home Standby Generator with 200 Amp Transfer Switch - Automatic Whole House Backup Power for Storms, Emergencies, and Outages, WiFi Enabled, Runs on Natural Gas or Liquid Propane

Rating
10.0
Chosen by1,390
Power Output (Wattage
Automatic Transfer Switch (ATS)
Noise Level

Most important from
426 reviews

Power Output (Wattage
The generator is quite loud but was able to run both my 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, providing electricity to the entire house and turning off automatically once power was restored. Very happy customer.
Noise Level
The generator is quite loud but was able to run both my 5-ton AC units and all normal house parts during summer testing.
Size and Installation
Solid heavy weight home generator. Easy to install fuel lines, but most buyers will need a 'permitted' electrician for the final panel hookup.

The Generac 7043 22kW Air Cooled Guardian Series Home Standby Generator offers powerful and reliable backup power for residential use. It provides a substantial 22,000 watts of power, which is sufficient to keep an entire household running during an outage. The generator operates on natural gas or LP gas, offering flexibility depending on your fuel source availability. The included 200-amp transfer switch ensures smooth and automatic transition during power failures, which is a crucial feature for uninterrupted home protection.

The Mobile Link Wi-Fi connectivity allows remote monitoring so you can keep track of its performance and maintenance needs from anywhere, adding convenience and peace of mind. Additionally, the generator features a robust G-Force engine, designed for durability and reduced maintenance, supported by a 5-year limited warranty. This highlights Generac's confidence in their product's longevity and reliability.

There are a few considerations to keep in mind. The generator is quite heavy, weighing 466 pounds, which could make installation challenging and will likely require professional assistance, as recommended by Generac. Although the generator is equipped with various safety features like overload protection and automatic shut down, it might be more expensive compared to smaller units due to its high power output and advanced features. This generator is a solid choice for homeowners looking for a high-capacity, reliable, and easy-to-monitor standby power solution.

Rating
10.0
Chosen by1,390
Power Output (Wattage
Automatic Transfer Switch (ATS)
Noise Level

Most important from
426 reviews

Power Output (Wattage
The generator is quite loud but was able to run both my 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, providing electricity to the entire house and turning off automatically once power was restored. Very happy customer.
Noise Level
The generator is quite loud but was able to run both my 5-ton AC units and all normal house parts during summer testing.
Size and Installation
Solid heavy weight home generator. Easy to install fuel lines, but most buyers will need a 'permitted' electrician for the final panel hookup.
#2

Generac Guardian 10kW Home Standby Generator with 100 Amp Transfer Switch - Automatic Whole House Backup Power for Storms, Emergencies, and Outages, WiFi Enabled, Runs on Natural Gas or Liquid Propane

Rating
9.1
Power Output (Wattage)
Automatic Transfer Switch (ATS)
Noise Level

Most important from
426 reviews

Power Output (Wattage)
Works as described! The generator handled both my 5 ton AC units during double start-up and all normal house loads during summer testing.
Automatic Transfer Switch (ATS)
Very happy customer. The generator kicked off and ran just fine during unexpected power outages, providing electricity to the entire house and turning off automatically after utility power came back on.
Noise Level
The generator is too loud to converse next to when running, but it operates smoothly and efficiently.
Size and Installation
Solid heavy-weight home generator. Installation requires a certified electrician for the final panel hookup, but instructions are easy to follow if you have some background.

The Generac 7172 10kW Air Cooled Guardian Series Home Standby Generator is designed to provide reliable backup power for residential use. With a power output of 10,000 watts, it offers ample capacity to keep essential household appliances running during an outage. This generator operates on natural gas or LP gas, giving homeowners flexibility in fuel choice. The included 100-amp automatic transfer switch ensures a seamless transition when the power goes out, maintaining convenience and safety without manual intervention.

The generator boasts a low noise level, making it a quieter option suitable for residential areas. The True Power Technology ensures less than 5 percent total harmonic distortion, providing stable and clean power which is crucial for sensitive electronics. The unit also features Wi-Fi connectivity for remote monitoring, allowing users to keep tabs on performance and receive maintenance alerts from anywhere.

The size and installation require professional setup by a certified electrician, but once installed, it promises long-term reliability with minimal maintenance due to its G-Force Engine. The 5-year limited warranty further adds to the peace of mind. At 338 pounds and dimensions of 48” L x 25” W x 29” H, the generator is quite bulky and may require significant space for installation. The generator’s robust build and high-quality construction, proudly made in the USA, make it a solid choice for homeowners seeking dependable whole-house protection during power outages.

Rating
9.1
Power Output (Wattage)
Automatic Transfer Switch (ATS)
Noise Level

Most important from
426 reviews

Power Output (Wattage)
Works as described! The generator handled both my 5 ton AC units during double start-up and all normal house loads during summer testing.
Automatic Transfer Switch (ATS)
Very happy customer. The generator kicked off and ran just fine during unexpected power outages, providing electricity to the entire house and turning off automatically after utility power came back on.
Noise Level
The generator is too loud to converse next to when running, but it operates smoothly and efficiently.
Size and Installation
Solid heavy-weight home generator. Installation requires a certified electrician for the final panel hookup, but instructions are easy to follow if you have some background.
#3

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

Rating
8.2
Power Output (Wattage)
Fuel Type
Automatic Transfer Switch (ATS)

Most important from
2284 reviews

Power Output (Wattage)
The generator reliably handles significant loads and starts effortlessly even after storage or break-in.
Fuel Type
Tri-fuel capability offers excellent flexibility, letting you switch between gasoline, propane, and natural gas with ease.
Automatic Transfer Switch (ATS)
Integration with a home transfer switch is seamless, though some adjustments like removing bonded ground may be needed.
Noise Level
The generator runs quietly for its size but remains noticeably loud, typical for home standby units of this power.
Size and Installation
The unit’s weight is substantial but manageable with the included wheels and handle, making relocation feasible though not effortless.

The Westinghouse 13500 Peak Watt Tri-Fuel Generator is a versatile home backup option, offering strong power with up to 13,500 peak watts and 10,500 running watts on gasoline. It’s especially handy because it runs on three fuel types—gasoline, propane, and natural gas—giving you flexibility depending on what’s available or preferred. The generator includes a remote electric start, which makes it easy to turn on without fuss, plus a key fob for convenience. With a 9.5-gallon tank, it can run up to 19 hours on gasoline, which is solid for extended outages.

It also comes ready for a transfer switch, meaning it can connect safely to your home’s electrical system for smooth power transition during outages. The noise level is typical for a generator this size—noticeable but not overly loud for a home setup. The unit is fairly heavy at 230 pounds and measures about 22 by 29.5 by 24 inches, so while portable with effort, it’s best suited for a fixed or semi-permanent spot. Safety features include automatic low oil shutdown and a carbon monoxide sensor, adding peace of mind during operation.

The generator supports multiple household and RV outlets, protected by rubber covers for durability. Installation is relatively straightforward with included tools and manuals, but you might want professional help for wiring the transfer switch. One downside is its weight, making it less easy to move regularly. Also, while it’s EPA compliant, fuel consumption varies by type, so running costs can differ. This generator represents a strong choice for homeowners wanting reliable, flexible fuel options and sufficient power for most household needs during outages.

Rating
8.2
Power Output (Wattage)
Fuel Type
Automatic Transfer Switch (ATS)

Most important from
2284 reviews

Power Output (Wattage)
The generator reliably handles significant loads and starts effortlessly even after storage or break-in.
Fuel Type
Tri-fuel capability offers excellent flexibility, letting you switch between gasoline, propane, and natural gas with ease.
Automatic Transfer Switch (ATS)
Integration with a home transfer switch is seamless, though some adjustments like removing bonded ground may be needed.
Noise Level
The generator runs quietly for its size but remains noticeably loud, typical for home standby units of this power.
Size and Installation
The unit’s weight is substantial but manageable with the included wheels and handle, making relocation feasible though not effortless.

Buying Guide for the Best Standby Generators

Choosing the right standby generator is crucial to ensure you have a reliable power source during outages. Standby generators are permanently installed and automatically provide power to your home or business when the main power supply fails. To make an informed decision, you need to consider several key specifications that will determine the generator's suitability for your needs. Understanding these specifications will help you select a generator that provides adequate power, operates efficiently, and fits your specific requirements.
Power Output (Wattage)Power output, measured in watts (W), indicates the amount of electricity the generator can produce. This is important because it determines how many and what type of appliances and systems you can run simultaneously during a power outage. Generators are typically categorized into three segments: small (up to 7,500 watts), medium (7,500 to 15,000 watts), and large (over 15,000 watts). To pick the right one, list the essential appliances and their wattage requirements, then choose a generator that can handle the total load with some extra capacity for safety.
Fuel TypeStandby generators can run on various fuel types, including natural gas, propane, diesel, and gasoline. The fuel type is important because it affects the generator's efficiency, cost of operation, and availability of fuel during emergencies. Natural gas and propane are popular for their clean-burning properties and continuous supply through utility lines, while diesel and gasoline are known for their high energy density. Choose a fuel type based on availability in your area, storage capabilities, and personal preference.
Automatic Transfer Switch (ATS)An Automatic Transfer Switch (ATS) is a device that automatically switches the power source from the main supply to the generator during an outage. This is important for convenience and safety, as it ensures a seamless transition without manual intervention. ATS systems come in different sizes and capabilities, so it's essential to choose one that matches your generator's power output and your electrical system's requirements. Consider your need for automatic operation and the complexity of your electrical setup when selecting an ATS.
Noise LevelThe noise level of a generator, measured in decibels (dB), indicates how loud the generator will be during operation. This is important for maintaining a comfortable environment, especially if the generator is located near living or working spaces. Generators can range from very quiet (below 60 dB) to quite loud (above 80 dB). If noise is a concern, look for models with lower decibel ratings or additional noise-reducing features. Consider the placement of the generator and local noise regulations when making your choice.
Run TimeRun time refers to how long a generator can operate on a full tank of fuel or continuous fuel supply. This is important for ensuring that you have power for the duration of an outage without frequent refueling. Run times can vary widely, from a few hours to several days, depending on the generator's fuel efficiency and tank size. Assess your typical power outage duration and choose a generator with a run time that meets your needs, keeping in mind the availability of fuel for extended outages.
Size and InstallationThe physical size and installation requirements of a standby generator are important considerations for ensuring it fits in the designated space and complies with local codes. Generators come in various sizes, and larger units may require more space and specific installation procedures. Evaluate the available space for installation, including clearance requirements, and consult with a professional to ensure proper setup. Consider the ease of maintenance and access to the generator when choosing the size and installation type.

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