10 Best Gen Generators 2025 in the United States

The Generac Guardian 14kW Home Standby Generator is a robust and reliable solution for whole-house power backup. It delivers 14,000 watts of power, making it capable of handling substantial household energy needs. This generator runs on natural gas or LP gas, which offers flexibility depending on what is available to you. Its durable aluminum enclosure ensures it can withstand outdoor conditions, and it comes with a 5-year limited warranty, giving you long-term peace of mind about your investment. Additionally, the G-Force Engine is designed for reliability and reduced maintenance, which can be a huge plus for homeowners who want a set-it-and-forget-it solution.

The inclusion of a 100 Amp transfer switch simplifies the integration with your home’s electrical system, providing seamless backup during outages. One notable feature is the Mobile Link Wi-Fi connectivity, allowing you to monitor the generator's performance remotely, which can be very convenient when you’re away from home. The generator is quite large and heavy, weighing 385 pounds, which might pose challenges during installation, so professional installation by a certified electrician is recommended. It operates relatively quietly compared to some other standby generators, thanks to the low-maintenance engines.

This generator is primarily suited for residential use and might be overkill for smaller homes or less demanding power needs. If you’re looking for a reliable, powerful, and easy-to-use standby generator for whole-house protection, the Generac Guardian 14kW stands out with its impressive features and robust construction.

The GENMAX Portable Generator (GM5500i) is a versatile option for those needing backup power for home use or camping. It provides a robust power output with 5000 running watts and 5500 peak watts, which is sufficient for running high voltage appliances and heavy-duty tools. This generator runs on gas and has a 3.9-gallon fuel tank, offering up to 10 hours of run time, making it reliable for extended use during outages or outdoor trips.

It features both manual and electric start options, simplifying the startup process and adding convenience. The generator is EPA compliant and includes an Eco-Mode for fuel efficiency and reduced emissions, alongside a CO Detect shutdown sensor for safety against carbon monoxide poisoning. One of the standout features is its low noise level, operating at only 60 decibels, which is quieter than many other generators and beneficial for residential areas and campgrounds.

However, at 127.8 pounds, it is quite heavy, though the telescoping handle helps with mobility. The generator includes multiple outlets, including a TT-30R RV outlet, making it suitable for various applications. Despite its weight, the GENMAX GM5500i is an excellent choice for those seeking a powerful and quiet generator with decent fuel efficiency and safety features.

The WEN DF451i is a versatile dual-fuel generator that runs on both gasoline and propane, offering up to 4500 surge watts and 3150-3500 running watts depending on the fuel used. This makes it powerful enough to handle a variety of devices, including RV appliances and sensitive electronics like smartphones and laptops, thanks to its clean power output. Its standout feature is the Auto Fuel Selection Technology, which switches between propane and gasoline to extend runtime, providing up to 9 hours of continuous use.

The generator is designed with quiet operation in mind, running at 58 dBA at quarter load—noticeably quieter than many generators—making it suitable for camping or residential areas. Starting the unit is hassle-free with a keyless electric start plus a backup recoil starter, and a fuel shut-off feature simplifies maintenance. Portability is decent with onboard wheels and a carrying handle, though at 100 pounds it’s somewhat heavy for frequent transport.

Connectivity options are solid, offering two standard 120V outlets, an RV-ready 120V outlet, a 12V DC outlet, and a USB port for charging smaller devices. On the downside, its fuel tank holds 2.2 gallons, which limits runtime when running on gasoline alone, and the weight might be cumbersome for some users. While quiet, it may not be the best fit if you need ultra-lightweight or ultra-compact gear. This generator suits RV owners and anyone needing reliable, quiet power with flexible fuel options and convenient features, balancing power, quietness, and usability well.