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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

Rating
10.0
Chosen by1,286
Size and Installation

Most important from
1 reviews

Size and Installation
Prompt and effective support is critical when dealing with expensive equipment requiring professional installation.

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.

Rating
10.0
Chosen by1,286
Size and Installation

Most important from
1 reviews

Size and Installation
Prompt and effective support is critical when dealing with expensive equipment requiring professional installation.
#2

Generac 22kW Whole Home Generator, Transfer Switch & Cellular Capability

The Generac 22kW Home Standby Generator is a powerful option designed to keep your entire home running smoothly during power outages. With a strong 22,000-watt output, it can handle essential appliances like heating, cooling, refrigeration, and lighting without missing a beat. It runs on fuel and includes a 200-amp automatic transfer switch, meaning it automatically kicks in when the power goes out, so you don’t have to do anything manually. A big plus is its built-in cellular connectivity, allowing you to monitor and control the generator remotely via a smartphone app, which adds convenience and peace of mind.

The generator is designed to be fuel-efficient and includes features like electronic ignition and oil sensors to help with reliable starts, even in cold weather. It’s fairly large and heavy (weighing around 451 pounds and measuring roughly 46 x 26 x 31 inches), so professional installation is recommended to ensure it fits well on your property and connects properly. Generac units typically operate quieter than portable generators, making this more neighborhood-friendly. Its fully enclosed design helps protect it from weather and debris, improving durability and reducing maintenance needs.

It comes with a 5-year warranty and 24/7 customer support, which adds confidence for long-term use. One potential downside is that monitoring via the app requires a paid subscription after a trial period, adding ongoing cost. Being a whole-house generator, it may be more than what smaller homes or those with fewer power needs require. This unit offers solid reliability and convenience as a robust, automatic backup power solution with smart features for a typical family home, though installation and ongoing app costs should be considered.

#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
255 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
255 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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