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 DuroMax XP13000EH Dual Fuel Portable Generator is a powerful option with a peak wattage of 13,000 watts, which makes it suitable for home backup during power outages or for use at job sites. It runs on either gasoline or propane, giving you flexibility in fuel choice. The electric start and user-friendly interface make it easy to operate, and it includes a 50-amp outlet for high-power needs.

Its copper windings and robust build ensure durability and longevity, even under heavy use and harsh weather conditions. The generator is portable with no-flat tires, but at 234 pounds, it is quite heavy, which might make moving it around challenging for some users.

Despite some drawbacks, the dual fuel capability, sturdy construction, and high power output make this generator a reliable choice for those needing a versatile and powerful backup power source.

The WEN 14,500-Watt Tri-Fuel Generator offers impressive versatility with the ability to run on gasoline, propane, and natural gas. This flexibility is a significant advantage for users who want options depending on fuel availability. It provides substantial power output, with 14,500 surge watts and 11,500 running watts on gasoline, making it suitable for heavy-duty tasks and emergency backups.

The electric start feature makes it user-friendly, and its compatibility with transfer switches enhances its utility during power outages. The 8.2-gallon fuel tank allows for up to 12 hours of runtime at half-load, which is adequate for most needs. However, its weight of 249 pounds might pose some challenges in terms of portability, even though it comes with a wheel kit.

This generator does not feature inverter technology, which means it may not provide the cleanest power for sensitive electronics. For those needing a robust, versatile power solution and who can manage its size and weight, the WEN 14,500-Watt Tri-Fuel Generator is a strong contender.