10 Best Home Backup Generators 2026 in the United States

The Generac 18kW Home Standby Generator is designed to provide reliable, whole-house backup power during outages, making it a strong choice for homeowners wanting to keep essential systems like heating, cooling, and refrigeration running smoothly. With an 18,000-watt output, it can comfortably handle most residential power needs. It runs on fuel such as natural gas or propane, and its smart fuel and ignition controls help optimize usage, which can save money and reduce emissions over time.

A standout feature is the built-in cellular connectivity, allowing you to monitor and control the generator remotely through a smartphone app, adding convenience and peace of mind. The generator automatically detects power outages and switches on quickly via its automatic transfer switch, ensuring minimal disruption. Noise levels are described as 'super quiet,' making it well suited for residential areas. Due to its weight of 426 pounds and size, portability is limited, positioning it as a more permanent installation rather than a moveable option. Additional features like oil level sensors and cold-start support enhance reliability, especially in colder climates. Compatibility with other home energy products from Generac offers benefits for those seeking a connected energy system.

The main considerations include its large size and installation requirements, which may necessitate professional setup and make it less suitable if a portable or easily moved generator is desired. Additionally, some advanced features require a paid subscription. For anyone seeking a dependable, automated backup power solution that covers the whole house and provides remote management, this generator is an excellent match, especially for users prioritizing convenience and reliability over portability.

The Generac Guardian 22kW Home Standby Generator is a robust choice for homeowners seeking reliable whole-house backup power during storms or outages. With a strong 22,000-watt output, it can comfortably handle the power needs of most homes, keeping essential systems running smoothly. It runs on either natural gas or liquid propane, offering flexible fuel options depending on availability. A big plus is the automatic transfer switch rated at 200 amps, which seamlessly switches your home’s power source to the generator during an outage without any manual effort. It also features Wi-Fi connectivity, allowing you to monitor the generator remotely for peace of mind.

The unit includes quiet operation technologies and fuel-efficient engines, meaning it won’t be too noisy or wasteful while running. However, this generator is quite heavy at 466 pounds, making it a permanent, stationary installation rather than portable. Professional installation by a licensed electrician is recommended, which adds to setup complexity and cost.

This generator is well suited for homeowners looking for a powerful, dependable backup with smart features and long-term support, but it’s not ideal if you need a lightweight or easily movable generator.

The EF ECOFLOW Portable Power Station DELTA 2 boasts an impressive power output of 1800 watts, with a starting wattage of 2700 watts, making it capable of powering 90% of home appliances. It's exceptionally flexible with its expandable capacity from 1kWh to 3kWh, ideal for various uses such as home backup power, camping, or RV trips. The unit uses a lithium iron phosphate (LiFePO4) battery, which is known for its safety and long lifespan of over 3000 charge cycles, ensuring durability and reliability over several years.

One of its standout features is the rapid charging capability, allowing it to charge from 0-80% in 50 minutes and 0-100% in 80 minutes with an AC input, which is highly convenient for emergency power needs. The DELTA 2 is also designed to be environmentally friendly, with the option to incorporate solar panels for clean, green charging. Weighing just 27 pounds, it is portable, although not the lightest option on the market. It includes a variety of charging cables and a comprehensive user manual, making setup straightforward.

One limitation is the absence of an automatic transfer switch (ATS), meaning it won't switch on automatically during a power outage, which could be a dealbreaker for some users looking for seamless power backup solutions. The EF ECOFLOW DELTA 2 is a robust and versatile power station suitable for those who need a reliable and portable power source for various applications, particularly if solar compatibility and rapid charging are priorities.