10 Best Fuel Efficient Generator 2025 in the United States

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.

The Westinghouse 13500 Peak Watt Dual Fuel Portable Generator is a solid choice for a home backup power source, especially if you want flexibility in fuel options. It runs on both gasoline and propane, which can be handy depending on what fuel is more available or economical for you. With 13,500 peak watts and 10,500 running watts on gasoline, it can handle heavy loads like multiple appliances or power tools comfortably. On propane, the peak wattage is a bit lower but still substantial.

One of the standout features is its runtime—up to 19 hours on a full 9.5-gallon tank, which means it can keep your essentials running for a long stretch without needing a refill. It also comes with a remote electric start, making it easier to operate, plus safety features like automatic low oil shutdown and carbon monoxide sensors.

In terms of portability, it weighs about 230 pounds, so it’s not lightweight and will need some effort or wheels to move around, which might be a drawback if you want something more mobile. It has multiple outlets, including ones ready for RV and transfer switches, adding to its versatility. This Westinghouse model fits well if you want a powerful, dual-fuel generator with long runtime and convenient features for home backup use. Keep in mind it’s fairly heavy and lacks inverter technology, so it won’t provide the super clean power that sensitive electronics might require.

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.