10 Best Fuel Efficient Generator 2025 in the United States

The Westinghouse 12500 Watt Dual Fuel Home Backup Portable Generator is a powerful and versatile option for home backup power needs. It supports both gasoline and propane, offering flexibility depending on fuel availability. With 9500 running watts and 12500 peak watts on gasoline (8500 running watts and 11200 peak watts on propane), it's capable of handling substantial loads, making it suitable for residential use during power outages or emergencies.

The generator features a remote electric start and a transfer switch ready design, adding convenience for users who want easy operations and seamless power transitions. It also comes with multiple protected outlets, including standard household receptacles and RV-ready outlets, enhancing its usability for various applications. The runtime of up to 12 hours on a 6.6-gallon fuel tank is quite practical, though fuel efficiency might vary depending on the load.

The built-in VFT display provides real-time updates on voltage output, frequency, and lifetime hours, which is helpful for monitoring performance. However, the generator's weight of 210 pounds could be a drawback for those seeking high portability, despite being labeled as portable. Additionally, the noise level is not specified, but generators of this size typically produce a considerable amount of noise, which could be a concern for some users. While it doesn’t include inverter technology, which is essential for sensitive electronics, it’s an excellent choice for general home backup with robust power output and dual fuel capability.

The Generac 8011 GP7500E is a robust dual-fuel generator capable of running on both gasoline and propane, offering flexibility in fuel choice. With a running wattage of 7500 Watts and a starting wattage of 9400 Watts, it is powerful enough to handle heavy electrical loads, making it suitable for both emergency power and recreational use. The PowerRush Advanced Technology enhances its starting capacity, which is a significant advantage for demanding applications.

Additionally, the COsense technology ensures safety by detecting carbon monoxide and alerting users, which is a crucial feature for long operation times or indoor use. The generator boasts an extended runtime with up to 110 hours at 50% load on gasoline, though propane offers only 5 hours at the same load, which may require more frequent refueling when using propane. The unit's portability is somewhat hampered by its substantial weight of 204 pounds, though the built-in wheels and handle do provide some mobility.

The generator includes an electric start, making it user-friendly, and features like the hour meter and low-oil shutdown help to maintain the engine's longevity. While its size and weight could be challenging for some users, the Generac 8011 GP7500E stands out for its power, dual-fuel capability, and extended runtime, making it a reliable option for both residential and commercial use.

The Westinghouse 28000 Peak Watt Tri-Fuel Generator is a powerful option designed mainly for larger homes needing reliable backup power. Its standout feature is the tri-fuel capability, meaning it can run on gasoline, propane, or natural gas, giving you flexibility depending on fuel availability or cost. It delivers substantial power, with 28,000 peak watts on gas and solid running watts across all fuels, which is enough to keep your essential home systems and many appliances running during outages.

In terms of fuel efficiency, it can run up to 13 hours at 25% load on a full gasoline tank, which is decent for its size and power. It also has an automatic idle control that helps save fuel when power demands are low, improving efficiency. The generator includes modern features like remote electric start, a digital display for monitoring, and built-in safety sensors, making it user-friendly and safer to operate. It also produces clean power with low total harmonic distortion, so your sensitive electronics like phones and computers are protected.

Portability is addressed with large never-flat wheels and foldable handles, but the unit is quite heavy at 557 pounds, so it’s best thought of as a semi-portable solution rather than something you’d move frequently or alone. This generator offers excellent power and flexibility, making it more suitable for residential whole-home backup rather than smaller, budget-conscious users looking for a quiet or lightweight model. If you want a robust, flexible, and feature-rich generator that can handle large power needs and multiple fuel types, this Westinghouse model is a solid choice. Just be prepared for the weight and consider noise and fuel cost details based on your priorities.