10 Best Generac Generators 2026 in the United States
#1
Winner
Generac 26kW Whole Home Generator, Transfer Switch & Cellular Capability
The Generac 26kW Home Standby Generator is designed to keep your entire home powered during outages, with a strong 26,000-watt output capable of handling household essentials like heating, cooling, and refrigeration simultaneously. It runs on fuel such as natural gas or propane and features electronic fuel and ignition controls to use fuel efficiently and reduce emissions. This model is not portable—it weighs over 500 pounds and is intended for permanent outdoor installation.
Rating
10.0
Chosen by1,428
Power Output (Wattage)
Start Type
Maintenance and Service
Most important from
2 reviews
#2
Generac 22kW Whole Home Generator, Transfer Switch & Cellular Capability
The Generac 22kW Home Standby Generator is designed to keep your whole house powered during outages, making it a solid choice for homeowners needing reliable backup electricity. Its 22,000-watt output is strong enough to run essential appliances like refrigerators, heating or cooling systems, and lights all at once. It runs on fuel and features electronic controls that optimize fuel use, helping save money and reduce emissions. This generator starts automatically when the power goes out, so you don’t have to worry about turning it on manually.
#3
Generac Guardian 26kW 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
The Generac Guardian 26kW Home Standby Generator is a solid choice for homeowners needing reliable whole-house backup power during outages. It delivers a strong 26,000 watts, enough to keep most household systems running smoothly. The generator runs on natural gas or propane, which are convenient and commonly available fuel options. It features a durable all-aluminum housing designed to withstand outdoor conditions and operates quietly, making it less disruptive in residential areas. Starting is electronic and automatic, so it powers up quickly and without manual effort during power failures.
Rating
9.7
Power Output (Wattage)
Fuel Type
Runtime
Most important from
57 reviews
Top 10 Best Generac Generators 2026 in the United States
#1
Winner
Generac 26kW Whole Home Generator, Transfer Switch & Cellular Capability
Generac 26kW Whole Home Generator, Transfer Switch & Cellular Capability
Power Output (Wattage): 26000 watts
Fuel Type: natural gas or propane
Portability: not portable
Start Type: fully automatic
Maintenance and Service: sensors, remote app, 5-year warranty
Chosen by 1428 this week
Generac 22kW Whole Home Generator, Transfer Switch & Cellular Capability
Generac 22kW Whole Home Generator, Transfer Switch & Cellular Capability
Power Output (Wattage): 22000 watts
Fuel Type: Fuel Powered
Portability: Not portable
Start Type: Automatic
Maintenance and Service: Oil sensors, auto shutdown low oil
Generac Guardian 26kW 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
Generac Guardian 26kW 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
Power Output (Wattage): 26000 watts
Fuel Type: Natural or LP Gas
Runtime: 12 minutes
Portability: Not portable
Start Type: Electronic, automatic
Maintenance and Service: G-Force engine, low oil shutdown
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
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
Power Output (Wattage): 22000 watts
Fuel Type: Natural Gas or LP Gas
Portability: 466 Pounds
Start Type: Electric start
Maintenance and Service: G-Force Engine, 5-year warranty
Generac 22kW Home Standby Generator for home use, built-in cellular connectivity, whole house generator for power backup
Generac 22kW Home Standby Generator for home use, built-in cellular connectivity, whole house generator for power backup
Power Output (Wattage): 22000 watts
Fuel Type: Fuel Powered
Portability: Not portable
Start Type: Automatic start
Maintenance and Service: Alerts, 5yr warranty, 24/7 support
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Generac 26kW Whole Home Generator, Cellular Capability
Generac 26kW Whole Home Generator, Cellular Capability
Power Output (Wattage): 26000 watts
Portability: not portable
Noise Level: moderate
Start Type: electronic, automatic
Maintenance and Service: 5-year warranty, 24/7 support
Generac 18kW Home Standby Generator for home use, built-in cellular connectivity, whole house generator for power backup
Generac 18kW Home Standby Generator for home use, built-in cellular connectivity, whole house generator for power backup
Power Output (Wattage): 18000 watts
Fuel Type: Fuel Powered
Portability: Not portable
Noise Level: Super quiet
Start Type: Automatic start
Maintenance and Service: Periodic servicing; app alerts
Generac 22,500 Starting Watt Portable Gas Generator
Generac 22,500 Starting Watt Portable Gas Generator
Power Output (Wattage): 18000 watts
Fuel Type: Gasoline
Runtime: 9 hours
Portability: Portable
Start Type: Electric start
Maintenance and Service: Regular oil checks and changes
Generac Guardian 14kW 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
Generac Guardian 14kW 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
Power Output (Wattage): 14000 watts
Fuel Type: Natural Gas or LP Gas
Portability: Permanent home installation
Start Type: Automatic electronic start
Maintenance and Service: 5 Year Limited Warranty
#10
20kW Standby Generator with 200amp TS
20kW Standby Generator with 200amp TS
Power Output (Wattage): 20 kW
Fuel Type: Natural Gas or Propane
Portability: Limited
Noise Level: Moderately loud
Start Type: Automatic
Maintenance and Service: Minimal maintenance
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Buying Guide for the Best Generac Generators
When it comes to picking a Generac generator, it's important to understand your power needs and the different features that can make a generator more suitable for your specific situation. Generac offers a variety of generators, each designed to meet different requirements, from home backup power to portable power solutions. By understanding the key specifications and how they relate to your needs, you can make an informed decision and choose the best generator for you.Power Output (Wattage)Power output, measured in watts, indicates how much electrical power the generator can produce. This is crucial because it determines what and how many devices or appliances you can run simultaneously. Generators come in different wattage ranges: low (up to 3,000 watts), medium (3,000 to 7,000 watts), and high (over 7,000 watts). For basic needs like running a few lights and small appliances, a low-wattage generator may suffice. For running multiple large appliances or whole-house backup, a medium to high-wattage generator is necessary. Assess your power needs by listing the essential devices you want to power and their wattage requirements.
Fuel TypeGenerators can run on various types of fuel, including gasoline, propane, natural gas, and diesel. The fuel type affects the generator's runtime, efficiency, and convenience. Gasoline is widely available but has a shorter shelf life. Propane and natural gas are cleaner and have longer shelf lives, with natural gas offering the convenience of a continuous supply if you have a gas line. Diesel is efficient and has a longer shelf life but is less common for residential use. Choose a fuel type based on availability, storage, and your preference for convenience and maintenance.
RuntimeRuntime refers to how long a generator can operate on a full tank of fuel. This is important for ensuring continuous power during outages. Generators with longer runtimes are more convenient as they require less frequent refueling. Runtime can vary based on the load and fuel type. For occasional use or short outages, a generator with a shorter runtime may be sufficient. For extended outages or continuous use, look for a generator with a longer runtime to minimize interruptions.
PortabilityPortability is a key factor if you need a generator that can be easily moved or transported. Portable generators are typically smaller, lighter, and equipped with wheels and handles. They are ideal for outdoor activities, job sites, or temporary power needs. Stationary or standby generators are larger and permanently installed, providing automatic backup power for homes or businesses. Consider how and where you will use the generator to determine if portability is a priority.
Noise LevelNoise level, measured in decibels (dB), indicates how loud the generator will be during operation. This is important for comfort and compliance with local noise regulations. Generators can range from very quiet (below 60 dB) to quite loud (above 80 dB). For residential areas or camping, a quieter generator is preferable to avoid disturbing neighbors or wildlife. For construction sites or remote locations, noise may be less of a concern. Consider where you will use the generator and choose a noise level that suits your environment.
Start TypeGenerators can have different start types, including manual recoil start, electric start, and automatic start. Manual recoil start requires pulling a cord, which can be physically demanding. Electric start uses a push-button or key, making it easier to operate. Automatic start is typically found in standby generators and activates automatically during a power outage. Choose a start type based on your preference for ease of use and the generator's intended application. For frequent or emergency use, electric or automatic start is more convenient.
Maintenance and ServiceRegular maintenance is essential to keep your generator running smoothly and extend its lifespan. Some generators come with features that make maintenance easier, such as low-oil shutoff, maintenance reminders, and easy-access panels. Consider the availability of service centers and replacement parts for the brand you choose. If you prefer minimal maintenance, look for generators with user-friendly features and good manufacturer support. Regularly check and follow the maintenance schedule to ensure reliable performance.