10 Best Backup Generators 2025 in the United States

The EF ECOFLOW Portable Power Station DELTA 2 Max is a solar-powered backup generator with a substantial power output of 2400W, making it suitable for powering nearly all household devices. One standout feature is its rapid charging capability, reaching 80% in just 43 minutes with combined solar and AC input, or in 1.1 hours using AC alone. The built-in LFP battery offers impressive longevity with up to 3000 cycles, translating to a 10-year lifespan, which is significantly higher than the industry average.

Additionally, the capacity can be expanded from 2kWh to 6kWh, providing flexibility based on energy requirements. The generator operates quietly, starting from just 30 dB, which is ideal for overnight use without disturbance. The EcoFlow app adds convenience by allowing users to manage energy use and set automations remotely. The product is relatively heavy at 50 pounds, which may affect portability despite its compact dimensions. It includes multiple charging options and safety features, making it well-suited for home backup, particularly for those looking for a clean, quiet, and efficient power solution.

The DuroMax XP15000EH Dual Fuel Portable Generator offers an impressive power output of up to 15,000 watts, making it suitable for powering an entire home during a power outage. Its dual fuel capability allows it to run on either gasoline or propane, providing flexibility in fuel choice. The generator has a robust build with a heavy-duty all-metal frame and copper windings, ensuring durability and longevity.

Additionally, it features a digital multimeter to display vital information like voltage, frequency, and hours run, and comes with a variety of outlets including a transfer switch-ready 50 amp outlet, enhancing its usability for residential and RV applications. The electric start feature and foldable handle add to its convenience, while the CO sensor and low oil shutdown increase safety during operation. However, its substantial weight of 380 pounds may pose challenges in portability, despite the no-flat tires.

The 10-hour runtime on a full tank is decent, though users might need to refuel more frequently during extended outages. It's designed for residential use and would be particularly beneficial for homeowners needing a reliable backup power source, especially in areas prone to severe weather. Despite its weight, the DuroMax XP15000EH stands out as a powerful and versatile backup generator.

The Generac Guardian 10kW Home Standby Generator is designed for those who need reliable backup power for their entire home. With a power output of 10,000 watts, it ensures sufficient energy to keep essential home appliances running smoothly during an outage. It operates on natural gas or LP gas, offering flexibility depending on your home setup. The generator's G-Force engine is known for its durability and lower maintenance needs, which is a significant advantage for long-term usage.

The included 100 Amp transfer switch facilitates the seamless integration of the generator with your home's electrical system, providing whole-house protection. One standout feature is its Wi-Fi connectivity, allowing users to monitor the generator’s performance remotely, which is very convenient for those frequently away from home. Additionally, the generator is housed in a durable aluminum enclosure, making it suitable for outdoor use under various weather conditions.

However, the generator isn’t very portable due to its weight (338 pounds), so it is best suited for permanent installation. While it is noted to be 'super quiet,' noise levels can still be noticeable compared to smaller, portable units. The generator also includes essential safety features such as automatic shutdown if issues are detected, but it must be installed by a certified electrician to ensure proper setup. This backup generator is ideal for homeowners seeking peace of mind with a reliable, efficient, and easy-to-monitor energy solution during power outages.