8 Best Natural Gas Backup Generators 2025 in the United States

The Generac Guardian 10kW Home Standby Generator is a robust solution for those seeking reliable whole-house power backup. Its 10,000-watt power output is sufficient for most residential needs, providing clean and stable power with less than 5% harmonic distortion. This ensures that sensitive electronics and appliances are safely powered during an outage. The included 100 Amp automatic transfer switch (ATS) allows for seamless switching when power is lost, enhancing convenience and security during blackouts.

The generator’s G-Force Engine is designed for durability and reduced maintenance, making it a low-maintenance option over time. Additionally, its aluminum enclosure provides protection against the elements, further ensuring long-term reliability. One standout feature is its Wi-Fi connectivity, which allows you to monitor its performance remotely via the Generac Mobile Link app. This can be particularly useful for staying informed about maintenance needs and generator status when you’re away from home.

Despite its many strengths, there are some considerations to keep in mind. At 338 pounds, this generator is quite heavy, making portability difficult. It’s designed for stationary installation rather than frequent movement. Also, while it is marketed as 'super quiet,' noise levels can still be noticeable, especially at night. Another point to consider is the initial cost and the need for professional installation, which can add to the total expense. The 5-year limited warranty provides additional peace of mind, covering various potential issues. This generator is ideal for homeowners who want a dependable, high-quality backup power solution and are willing to invest in professional setup and occasional maintenance.

The DuroMax XP13000HXT 13,000-Watt Tri Fuel Generator offers impressive power output at 13,000 watts, making it suitable for both residential and commercial use. This high wattage ensures it can handle the energy demands of an entire home during a power outage. The tri-fuel capability allows the generator to run on gasoline, propane, or natural gas, offering flexibility and convenience based on fuel availability and preference. Equipped with a powerful 500cc engine, it promises reliable performance. The generator's electric start and remote start features add ease of use, eliminating the need for manual pull-starting.

Additionally, the front-facing interface allows for quick fuel type changes, enhancing user convenience. The CO Alert feature is a significant safety addition, protecting users from harmful fumes. With a noise level of 74 dB, it may be louder than some quieter models, which is a consideration for those in noise-sensitive environments. At 240 pounds, it is relatively heavy, yet the included wheel and handle kit aids mobility. The unit is sizable, so it requires sufficient storage space. Maintenance is manageable with the provided tools, although regular checks are necessary to maintain optimal performance.

One notable absence is the automatic transfer switch (ATS), which would have allowed for seamless switching during power outages. The generator runs for approximately 8 hours, which is decent but may require refueling for longer outages. Overall, the DuroMax XP13000HXT is a robust, versatile generator that excels in power output and fuel flexibility but may be less ideal for those needing a quieter, more compact solution with automatic transfer switching.

The 20kW Standby Generator by KOHLER offers robust power backup with a strong power output of 20 kilowatts, making it suitable for residential use. It is convenient for homeowners looking for a reliable power solution, as it features an automatic transfer switch (ATS) that can restore power in just 10 seconds. This is particularly useful in maintaining the operation of essential devices and appliances during outages.

This generator is versatile in its fuel options, capable of running on natural gas or liquid propane, providing flexibility based on available resources. The inclusion of a 200-amp outdoor-rated transfer switch further enhances its utility for home installations. A standout feature is its KOHLER Command PRO engine, known for durability and designed to handle commercial-grade tasks. It also includes PowerBoost technology, which helps in managing large loads such as central air conditioners without affecting other appliances.

However, the generator is hefty, weighing 485 pounds, which may present challenges in portability and installation. It's more suited for a permanent installation rather than a portable one. The noise level, a crucial factor for many users, isn't explicitly mentioned but typically, generators of this size can be quite loud. Maintenance is made easier with hydraulic valve lifters, reducing the need for frequent valve adjustments. Still, regular checks and servicing might be needed to ensure optimal performance. The product is well-reviewed, suggesting reliability and user satisfaction. Yet, potential buyers should consider the space requirements for its installation, as its dimensions are 47" long, 26.2" wide, and 32.2" high, which requires ample outdoor space.

In essence, this KOHLER generator is ideal for those needing a dependable and powerful backup power solution, with the caveat of needing a suitable outdoor setup and handling its considerable weight.