10 Best Diesel Generators 2025 in the United States

The DuroMax XP15000HX is a powerful portable generator offering 15,000 watts of starting power and 12,000 watts running power, suitable for whole-home backup during power outages or for commercial use. One of its biggest advantages is dual fuel capability, allowing you to run it on gasoline or propane. Propane is cleaner, more fuel-efficient, and easier to store long-term, which can save money and reduce maintenance. It features a robust 670cc engine and durable all-copper windings designed to extend its lifespan. The generator is transfer switch ready, meaning it can easily connect to your home’s electrical system for seamless power backup.

Its control panel is user-friendly, with a digital display showing voltage, frequency, and maintenance reminders, plus a convenient push-button start and remote control. Safety is enhanced by a CO Alert system that shuts the generator off if dangerous carbon monoxide levels are detected. Despite weighing 345 pounds, it includes wheels and a handle to help with moving it around, though it is still better suited for those who need a relatively heavy-duty, stationary backup rather than light portability. Maintenance is supported with included tools and clear indicators for service intervals.

This generator is an excellent option for anyone needing reliable, flexible power backup or a generator capable of handling high loads, especially if you want the option of cleaner propane fuel. However, its weight and size may make it less convenient for frequent transport or casual recreational use.

The DuroMax XP13000EH is a powerful dual fuel portable generator that stands out for its impressive 13,000 watts of starting power, making it suitable for home backup during outages or powering tools on job sites. Its versatility in fuel options—running on either gasoline or propane—is a significant advantage, allowing users to choose based on availability and cost. The generator features a user-friendly electric start and a quick fuel switch, enhancing ease of use. With a robust all-metal construction, it's built for durability and can handle rough weather conditions, which is a plus for those needing reliable outdoor power.

On the portability front, the generator comes with no-flat tires and a foldable handle, making it relatively easy to transport. However, at 234 pounds, it may still be a bit heavy for some users to move around without assistance. The generator offers a solid run time and demonstrates a good balance of performance and satisfaction.

Despite its strengths, there are some drawbacks to consider. The noise level is typical for generators in this power range, which might be a concern for users in quiet neighborhoods. Additionally, while the DuroMax brand is known for its reliability, maintenance is essential for long-term performance, and users should be prepared for periodic upkeep. Lastly, while it comes with a variety of outlets, the absence of an automatic transfer switch (ATS) can be a drawback for those looking for seamless integration with home electrical systems.

The DuroMax XP13000EH is a strong contender for anyone needing portable power for residential use, RV trips, or job sites, especially if you value flexibility in fuel options and durability.

The Generac Guardian 22kW Home Standby Generator is a powerful option for homeowners seeking reliable backup power during outages. It delivers a strong 22,000 watts of clean and stable electricity, enough to cover an entire house comfortably. Its engine is designed to be fuel-efficient and quieter than many comparable generators, which helps reduce noise disturbance during use. The unit runs on natural gas or propane, which are convenient and readily available fuel sources for many users.

One standout feature is the included 200 Amp automatic transfer switch, which seamlessly switches your home’s power to the generator when the main power goes out—meaning you won’t have to lift a finger during an outage. The transfer switch is also built to last with a five-year warranty and is housed in a weatherproof aluminum enclosure for outdoor installation. The generator comes Wi-Fi enabled, allowing you to monitor its status and maintenance alerts remotely via an app, providing extra convenience and peace of mind.

In terms of size and weight, it’s a heavier and less portable unit (466 pounds), so it’s best suited for permanent home installation rather than moving around. Maintenance needs are relatively low thanks to the durable G-Force engine, but professional installation and occasional servicing by a licensed electrician are recommended to keep it running smoothly. Though this generator is on the pricier side and installation can be involved, its combination of power, reliability, and smart features makes it an excellent choice for homeowners wanting a dependable whole-house backup power solution.