10 Best Portable Whole House Generator 2025 in the United States

The Generac 7705 GP15500EFI is a robust portable generator that shines in its power output and safety features, making it a solid choice for both emergency backup and job site applications. With a powerful 15,500-watt output and an impressive starting wattage of 19,300 watts, it can easily handle most household appliances, tools, and other power needs during outages or projects. Its electronic fuel injection engine enhances performance efficiency, ensuring you get the most out of your fuel.

A standout feature is the integrated COsense technology, which actively monitors carbon monoxide levels, providing an added layer of safety during operation. This is especially crucial in residential settings where carbon monoxide can pose a serious risk. The generator also offers a commendable runtime of up to 11 hours, depending on the load, thanks to its 5-gallon fuel tank.

Portability is another strength, as the unit is designed with durable, never-flat wheels that make transportation easier. However, its weight of 450 pounds can present challenges for some users when moving it around, especially in uneven terrains. The noise level, while not specified, tends to be higher in powerful generators like this one, which might be a consideration in quieter neighborhoods. Additionally, the generator's bulkiness may limit its use in smaller spaces.

The Westinghouse 12500 Watt Dual Fuel Home Backup Portable Generator is a solid choice for those needing a reliable power source for their entire home. It offers impressive power output with 9500 running watts and 12500 peak watts on gasoline, and 8500 running watts and 11200 peak watts on propane, making it versatile for different fuel preferences. The dual-fuel capability is a significant advantage, providing flexibility during fuel shortages.

The generator includes a remote start with a key fob, which adds convenience, along with electric and recoil start options. Its 6.6-gallon fuel tank allows for up to 12 hours of run time, which is quite adequate for most residential needs. This model is designed with safety in mind, featuring GFCI outlets with rubber covers, automatic low oil shutdown, and a durable cast iron sleeve engine. The inclusion of a transfer switch-ready outlet simplifies connection to your home’s power system.

However, at 210 pounds, it is quite heavy, which could affect portability despite having wheels. The generator comes with useful accessories and a three-year limited warranty, indicating strong support from the manufacturer. This makes it suitable for homeowners looking for a comprehensive backup solution, though its weight might require consideration.

The Westinghouse 28000 Peak Watt Home Backup Portable Generator is a powerful and reliable option for home backup power needs. With 20,000 running watts and 28,000 peak watts, it delivers substantial power suitable for most household appliances. It's fueled by gas and comes with a large 17-gallon fuel tank, providing up to 17 hours of run time at 25% load, making it highly dependable during extended outages.

The electric start with auto choke simplifies the starting process, and the generator is equipped with multiple safety features, including automatic low oil shutdown and GFCI-protected outlets covered with rubber for added protection. Additionally, it includes a digital readout displaying key metrics like lifetime run hours, volts, and frequency, helping users monitor its performance efficiently.

However, the generator is quite heavy, weighing 583 pounds, which might pose challenges in terms of portability despite the reinforced steel handles. The setup is user-friendly with a plug-and-play design, and it comes with all necessary accessories. This generator is backed by a 3-year limited warranty and nationwide customer service, making it a solid choice for residential use. Those who need a robust and feature-rich generator that can handle significant power demands will find it very useful, though they should be prepared for its considerable size and weight.