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9 Best Generac Portable Generators 2025 in the United States

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#1

Winner

Generac 15,500-Watt Gas-Powered Portable Generator - Powerful Electronic Fuel Injection Engine - COsense Technology - Emergency Backup Power and Job Sites - 49 State Compliant - Home Use, Orange/Black

The Generac 15,500-Watt Gas-Powered Portable Generator stands out with its powerful 816cc Electronic Fuel Injection engine, delivering a robust 15,500 running watts and 19,300 starting watts. This ensures ample power for heavy-duty needs, making it ideal for emergency backup power and job sites. The generator uses gasoline, which is easily accessible, and features a substantial 5-gallon fuel tank that offers up to 11 hours of runtime. This extended runtime is beneficial during prolonged power outages or extended work sessions.

Portability is enhanced by its heavy-duty, never-flat wheels and a sturdy 1.25-inch steel-tube cradle, though the 450-pound weight may still pose a challenge for some users when moving it without assistance. Starting the generator is convenient with its electric start mechanism, simplifying the process compared to pull-start models. The COsense technology is a significant safety feature, alerting users to hazardous carbon monoxide levels, which is crucial for indoor use or in enclosed areas.

Maintenance is user-friendly with an hour meter for tracking service intervals and a low-oil shutdown feature to protect the engine. This generator might be overkill for users with minimal power needs and could be better suited for those requiring substantial, reliable power in both residential and commercial settings.

Customer Highlights

A summary of real customer reviews to highlight what shoppers are saying!
Power Output (Wattage)
Runs daily for business use with no issues even after almost 500 hours; quality is solid, and it's safe for electronics.
Portability
Built sturdy and easy to start, with large wheels making it convenient to move around.
Starting Mechanism
Built sturdy and easy to start, with large wheels making it convenient to move around.
#2

Generac 18,000-Watt Gas-Powered Portable Generator - COsense Technology - TruePowerTechnology - Reliable Power for Emergencies, Recreation, Home - 49 State Compliant - Orange/Black

The Generac 18,000-Watt Gas-Powered Portable Generator is a robust choice for those needing reliable power in various scenarios such as emergencies, recreational activities, or home use. Its powerful 816cc EFI engine ensures high performance and efficiency, delivering a substantial 18,000-watt output which is suitable for powering large appliances or multiple devices simultaneously. This generator runs on gasoline, which is widely accessible, making refueling convenient. The large fuel tank extends its run time, allowing for prolonged use without frequent refueling stops. Additionally, the integrated fuel gauge helps monitor fuel levels easily.

COsense Technology is a standout safety feature that protects against carbon monoxide hazards, ensuring safe operation. Plus, the TruePower Technology provides clean power with less than 5% Total Harmonic Distortion (THD), making it safe for sensitive electronics. Portability, while mentioned, is somewhat compromised due to the heavy weight of 442.8 pounds, which may require multiple people or additional equipment to move it around. The generator also features a low-oil pressure shutdown to prevent engine damage, enhancing its longevity. This generator is 49 state compliant, making it a versatile option for most regions.

Customer Highlights

A summary of real customer reviews to highlight what shoppers are saying!
Fuel Type
It is loud but easy to use, especially with non-ethanol fuel and regular oil changes.
Portability
Despite its heavy weight, the large wheels make it easy to move around.
Noise Level
It is loud but easy to use, especially with non-ethanol fuel and regular oil changes.
Starting Mechanism
It is well-built and easy to start, offering good value for the price.

Buying Guide for the Best Generac Portable Generators

Choosing the right Generac portable generator involves understanding your power needs and the features that will best suit your usage. Portable generators are versatile tools that can provide electricity during power outages, for outdoor events, or on job sites. To make an informed decision, you need to consider several key specifications that will determine the generator's performance and suitability for your specific requirements.
Power Output (Wattage)Power output, measured in watts, indicates how much electricity the generator can produce. This is crucial because it determines what and how many devices you can power simultaneously. Generators typically range from 1,000 to 10,000 watts. For light use, such as camping or running small appliances, a generator with 1,000 to 3,000 watts is sufficient. For home backup during outages, you might need 3,000 to 6,000 watts. For heavy-duty use, like powering multiple large appliances or tools, look for 6,000 watts or more. Assess your power needs by listing the devices you plan to run and their wattage requirements.
Fuel TypePortable generators can run on various fuels, including gasoline, propane, and diesel. Gasoline is the most common and widely available, but it has a shorter shelf life and can be less efficient. Propane is cleaner and has a longer shelf life, but it requires a separate tank. Diesel is more efficient and has a longer engine life, but diesel generators are typically more expensive and heavier. Choose the fuel type based on availability, storage, and your specific needs. For occasional use, gasoline might be convenient, while for frequent or long-term use, propane or diesel could be more practical.
Run TimeRun time refers to how long the generator can operate on a full tank of fuel. This is important for planning how often you will need to refuel, especially during extended power outages or long events. Generators with larger fuel tanks generally have longer run times. For example, a generator with a 5-gallon tank might run for 8-12 hours at 50% load. If you need continuous power for long periods, look for a generator with a longer run time to minimize refueling interruptions. Consider your typical usage duration and choose a generator that can meet those needs without frequent refueling.
PortabilityPortability is determined by the generator's weight, size, and design features like wheels and handles. This is important if you need to move the generator frequently or transport it to different locations. Lightweight generators (under 50 pounds) are easy to carry and ideal for camping or tailgating. Medium-weight generators (50-100 pounds) often come with wheels and handles, making them suitable for home use or job sites. Heavy-duty generators (over 100 pounds) are more powerful but require more effort to move. Consider how and where you will use the generator and choose one that you can easily transport and maneuver.
Noise LevelNoise level, measured in decibels (dB), indicates how loud the generator will be during operation. This is important for comfort and compliance with noise regulations, especially in residential areas or campsites. Generators typically range from 50 dB (quiet) to 90 dB (loud). For quiet environments, such as camping or home use, look for generators with noise levels under 60 dB. For construction sites or areas where noise is less of a concern, higher noise levels might be acceptable. Consider where you will use the generator and choose one with a noise level that won't be disruptive.
Starting MechanismGenerators can have different starting mechanisms, including manual recoil start, electric start, and remote start. Manual recoil start requires pulling a cord, which can be physically demanding. Electric start uses a battery to start the generator with the push of a button, offering convenience and ease of use. Remote start allows you to start the generator from a distance using a remote control. Choose the starting mechanism based on your preference for convenience and ease of use. If you prefer simplicity and don't mind a bit of physical effort, a recoil start might be sufficient. For maximum convenience, especially for frequent use, consider an electric or remote start.

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