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10 Best Standby Generators 2026 in the United States

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Our Top Picks

#1

Winner

Generac 24kW Home Standby Generator for home use with 200 amp transfer switch, built-in cellular connectivity, whole house generator for power backup

The Generac 24kW Home Standby Generator provides reliable whole-house backup power during outages with a 24,000-watt output capable of supporting household systems such as refrigeration, heating/cooling, and lighting. It includes a 200 amp automatic transfer switch that detects power loss and switches to generator power automatically, offering convenience for home use. The generator features electronic ignition and fuel control to enhance fuel efficiency and reduce emissions.

A notable feature is built-in cellular connectivity, allowing remote monitoring and control through a mobile app, though it requires a paid subscription. The unit is equipped with sensors for oil level and improved cold start capability, supporting reliable operation in colder climates. Its fully enclosed design helps reduce noise and protect the generator from snow or ice. Due to its weight of over 460 pounds, professional installation is recommended.

The product comes with a 5-year warranty and 24/7 customer support for added peace of mind. This generator is suited for homeowners seeking automated, reliable backup power with remote monitoring capabilities, though it is not compatible with smart home systems beyond the app feature. Potential buyers should confirm specific requirements such as fuel type and noise level to ensure it fits their needs.

#2

Generac 22kW Home Standby Generator for home use, built-in cellular connectivity, whole house generator for power backup

The Generac 22kW Home Standby Generator is designed to provide reliable whole-house backup power, making it a strong choice for homeowners wanting to avoid disruptions during outages. With 22,000 watts of power, it can easily support essential appliances like heating, cooling, refrigeration, and lighting. It runs on fuel efficiently, thanks to electronic fuel and ignition controls that help reduce fuel use and emissions compared to earlier models.

The built-in cellular connectivity lets you monitor and control the generator remotely via an app, which is handy if you’re away from home, though a subscription is required for full features. Its automatic transfer switch detects outages and starts the generator without manual intervention, ensuring your home stays powered without delay. The unit is designed for durability with a fully enclosed aluminum and steel build, and it comes with helpful features like oil level sensors and cold start support for reliability in colder climates.

At about 451 pounds and with a footprint of roughly 4 by 2 feet, it will need professional installation, but its size is typical for a home standby generator. The 5-year warranty and 24/7 support add peace of mind. This generator is a robust, easy-to-manage backup power solution that covers an entire home’s electrical needs.

#3

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
9.7
Power Output (Wattage
Automatic Transfer Switch (ATS)
Noise Level

Most important from
254 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
9.7
Power Output (Wattage
Automatic Transfer Switch (ATS)
Noise Level

Most important from
254 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.

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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