10 Best Whole House Generators 2025 in the United States

The DuroMax XP15000HX 15,000-Watt Dual Fuel Portable Generator is a robust option for ensuring your whole house stays powered during outages. With a significant 15,000-watt output, it can handle extensive power needs, making it ideal for large homes or even commercial use. The dual fuel capability allows you to use either gasoline or propane, giving you flexibility based on availability and cost efficiency. Propane, in particular, is a cleaner and longer-lasting fuel option, which can be beneficial for maintenance and storage.

The generator includes an automatic transfer switch-ready outlet, making it convenient for seamless integration into your home's power system during an outage. The CO Alert feature is a critical safety addition, shutting down the generator if it detects harmful carbon monoxide levels. This adds a layer of safety for your household that can't be overlooked. The multiple outlets and a digital display that shows voltage, frequency, and maintenance schedules make the generator versatile and user-friendly.

There is also a push-button start and remote control for easy operation. However, the generator is quite heavy at 345 pounds, which may be cumbersome for some users despite its portability features like wheels and handles. Additionally, it operates at a noise level that might be noticeable, though this is typical for generators of this capacity. The large size and weight mean installation might require some effort and space planning. With a 5-year warranty, it offers reassurance of longevity and reliability.

The Westinghouse 14500 Peak Watt Tri-Fuel Home Backup Portable Generator is a versatile option for those looking for a reliable backup power source for larger homes. One of its significant strengths is the tri-fuel capability, allowing it to run on gasoline, propane, or natural gas, which provides flexibility based on availability and cost of fuel. With a peak wattage of 14,500 watts on gasoline and a running wattage of 11,500 watts, it can handle substantial power loads.

The run time is also impressive, offering up to 19 hours on a full 9.5-gallon gasoline tank and up to 7 hours on a 20 lb. propane tank, ensuring long-lasting power during outages. The heavy-duty 550cc 4-stroke OHV engine is built for durability, featuring a cast iron sleeve for added longevity. This generator includes a remote electric start for convenience, and it is transfer switch ready, making it easier to connect to your home's electrical system in emergencies.

Additionally, it comes with features like overload protection, automatic voltage regulation, and a muffler for noise reduction. However, at 230 pounds, it is quite heavy and may require significant effort to move. Installation and setup may also be challenging due to its size and weight. Despite these drawbacks, it remains a highly rated product, indicating strong customer satisfaction. This generator is best suited for residential use, particularly for those needing a robust and flexible backup power solution.

The Generac 7210 24kW Air Cooled Guardian Series Home Standby Generator is designed to offer reliable power for residential use during outages. With a noteworthy power output of 24,000 watts, it ensures that even larger homes can stay powered, making it a strong candidate for whole-house protection. One of its standout features is the 200-amp automatic transfer switch, which ensures seamless power switching, allowing for uninterrupted service during outages. Additionally, the Smart Controls and Mobile Link Wi-Fi connectivity enable users to monitor the generator’s performance remotely, which is a big plus for peace of mind.

The generator operates on natural gas or LP gas, offering flexibility based on user preference. With Generac’s True Power Technology, the generator promises clean and stable power, minimizing the risk of damage to sensitive electronics. The 5-year limited warranty adds an extra layer of reassurance regarding the product's reliability and long-term performance.

Potential buyers should consider a few drawbacks. The generator's weight of 455 pounds could pose challenges during installation, which requires a certified electrician. Additionally, its size may not be suitable for all outdoor spaces, requiring ample installation area.