5 Best Backup Power Generators for Home in 2025
As new homes and businesses are built, more people than ever are reliant on the electrical grid. At the same time, the weather has become more extreme and unpredictable. Both of these factors, when combined, have created more opportunities for outages.
Home backup generators are essential for outages to maintain comfort, ensure safety, preserve food, and keep crucial medical devices operational. The options range from portable units to whole-home systems, catering to every need and budget. Here are EcoFlow’s best solutions to backup your home’s power.
EcoFlow’s Top Backup Power Generators for Homes
Best for Whole-Home Backup: EcoFlow DELTA Pro Ultra
Best for Essential Appliances: EcoFlow DELTA 3 Ultra Plus
Best for Budget-Conscious Homeowners: EcoFlow DELTA 2 Max
Best for Apartments and Small Homes: EcoFlow RIVER 3
Best for Solar Integration: EcoFlow DELTA Pro + Solar Panels
EcoFlow’s wide range of backup power options can cater to any scenario, whether it’s a brief power interruption or an extended outage. Find your perfect fit below:
Best for Whole-Home Backup: EcoFlow DELTA Pro Ultra
The EcoFlow DELTA Pro Ultra is an industry-leading, expandable system. Its base capacity of 61kWh can be expanded up to 90kWh with extra batteries, allowing it to grow and scale as your needs change. It supports both 120V and 240V split-phase output and can integrate directly with your home’s electrical panel using the EcoFlow Smart Home Panel 2.
One of the biggest benefits of an integrated, whole-home backup system is the automatic 20ms switchover time. You’ll hardly notice the power goes out, because your home will immediately switch to your reserved power. It’s the ideal solution for complete home coverage, especially if your area experiences frequent or extended outages.
To ensure continuous power, consider pairing it with solar input so you can recharge the battery whenever the sun comes out.
Best for Essential Appliances: EcoFlow DELTA 3 Ultra Plus
A good option for those looking for a powerful mid-range solution is the EcoFlow DELTA 3 Ultra Plus. With a 3072Wh capacity and a 3600W rated output (and a 7200W surge capacity), it can keep all your most essential appliances running while saving you money. It’s also scalable, like the EcoFlow DELTA Pro Ultra, with a capacity of up to 11kWh with extra batteries.
The Smart Output Priority technology can even simplify some of the work involved in choosing which circuits to run, allowing you to prioritize specific outputs and make adjustments directly from the app.
Between outages, you’ll appreciate the fast recharge from 0% to 80% in just 89 minutes with AC power. However, if AC’s not available, you can also recharge with your car’s alternator or solar panels.
Best for Budget-Conscious Homeowners: EcoFlow DELTA 2 Max
If budget is top of mind for you, consider the EcoFlow DELTA 2 Max, which offers excellent value for your money. You’ll get 2048Wh capacity (expandable to 6144Wh with extra batteries), 2400W output (and 4800W surge power), fast charging, 13 total outlets, and proven long-term reliability with a 3000+ cycle LiFep04 battery. It’s also lightweight at 50 lbs (23kg), so you can take it with you if needed.
Best for Apartments and Small Homes: EcoFlow RIVER 3
The compact and portable design of the EcoFlow RIVER 3 makes it ideal for space-constrained apartments and small homes. It can run your lights, phones, laptops, and even a small refrigerator with its 245Wh capacity when an outage strikes. Just because you’re budget-conscious and short on space doesn’t mean you can’t enjoy the benefits of a backup generator. This model is proof!
What to Consider When Choosing a Backup Power Generator for Your Home
Power capacity (Wh or kWh): Calculate the total wattage of your appliances, considering simultaneous usage, account for startup surge requirements, and factor in future expandability. Choose a generator size that can meet these needs.
Output power (W): Understand the difference between continuous and surge wattage ratings, ensuring the generator can handle the higher surge power required by appliances with compressors.
Runtime: How long do you anticipate needing backup power during a typical outage? Keep in mind that solar charging can extend runtime indefinitely.
Portability: Low weight, carrying features, and compact size make a generator more portable. Does that matter to you, or do you prefer an installed generator?
Charging speed: AC wall charging speed is crucial when outages are frequent, but solar charging speeds are equally important if you plan to integrate your generator with solar panels for continuous use.
Expandability: Can the generator be expanded with additional batteries? This feature is excellent if you expect your power needs to grow over time, creating more value in your initial investment.
Frequently Asked Questions
What Is the Best Time of the Year To Buy a Generator?
The best time of year to buy a generator is usually during the off-season, when you can find better deals (spring/summer), or pre-hurricane season if you live in an area prone to hurricanes and want to secure one before demand surges. Look for significant discounts during Black Friday or Cyber Monday.
What Is the Best Size Generator for Home Use?
The right size for you depends on the essential appliances you want to power and the expected duration of the outages. Small homes and apartments will have different needs than larger homes or those who want a whole-home backup. Calculate the total wattage of your must-have appliances and add a buffer for output and capacity to ensure safety and scalability.
What Is the Best Generator for Home Backup Power?
There’s no one single “best” generator, as it depends on your specific needs. If you want whole-home backup power, opt for the EcoFlow DELTA Pro Ultra; if you need a budget-friendly option, consider the EcoFlow DELTA 2 Max. Consider factors such as expandability, capacity, budget, and installation requirements to make the right choice.
Backup Power Generators Provide Energy Security, Ensure Comfort, and Empower Home Resilience
Backup power generators are no longer a luxury; for those who experience frequent or extended outages, they’re a necessity. Thankfully, EcoFlow offers solutions for every home size, power need, and budget. When you pair a backup battery like the EcoFlow DELTA 3 Ultra Plus with solar, you can enjoy continuous, clean, safe, and quiet power, giving you peace of mind regardless of the frequency or duration of outages.