By Emily ParkerChoosing ecoflow delta pro ultra whole-home backup power starts with one question: how much of your house do you actually need to keep running when the grid goes down? A refrigerator, a CPAP machine, a sump pump, a few lights and a Wi-Fi router are a very different load from a central air conditioner, an electric range and an electric water heater. This guide compares eight options across the solar generator and power station market that can serve as whole-home or near-whole-home backup, with the selection criteria spelled out so you can match a unit to your loads rather than to a brand name.
Our selection criteria were built from published specifications, brand reputation for backup-focused products, and the patterns owners tend to report after months of use: battery capacity in watt-hours, continuous and surge output in watts, number and type of AC outlets, transfer and expansion options, charge speed, and how the unit handles cold-weather and heat. We have not run these units ourselves; everything below reflects manufacturer specifications and commonly reported owner experiences.
Our Top Picks
Quick Comparison
| Product | Best for | Key feature |
|---|---|---|
| EcoFlow Delta Pro Ultra | Whole-home backup with high surge demand | Expandable battery capacity and high AC output |
| EcoFlow Delta Pro 3 | Large-home essentials and heavy appliances | High-output inverter with fast recharge |
| EcoFlow Delta Pro | Whole-circuit backup in a single unit | Expandable LFP battery with large AC capacity |
| Bluetti AC300 with B300 battery | Modular home backup that grows over time | Modular battery expansion |
| Anker SOLIX F3800 Plus | Whole-home backup with a 240V-capable inverter | Split-phase 240V output and expandable capacity |
| Jackery Explorer 3000 Pro | Essentials backup for a small to mid-size home | Solid LFP capacity with a manageable footprint |
| Bluetti EB3A | Budget essentials backup for a bedroom or apartment | Compact size with a simple setup |
| Jackery Explorer 1000 Pro | Fridge, CPAP and lights during short outages | Portable form factor with quick charging |
EcoFlow Delta Pro Ultra
This is the flagship choice for homeowners who want the closest thing to whole-home coverage in a portable-style power station, especially if they plan to add batteries over time and need enough surge capacity to start a well pump or a mini-split heat pump. You may also like 7 Best Generac Home Backup Power Systems for Outages (2026).
Key specs
- Expandable battery capacity designed to scale well beyond the base unit
- High continuous AC output rated for multiple large loads at once
- Multiple AC outlets plus a transfer-ready option for integration with a home circuit
- Fast-charge input from grid and solar sources
Pros
- Enough output for many whole-circuit loads running together
- Expansion path lets you grow runtime without replacing the unit
- Strong fit for pairing with a solar array for extended outages
Cons
- Large and heavy, so installation planning matters
- Full whole-home coverage still depends on your actual wattage and battery count
EcoFlow Delta Pro 3
A good match for households that want high output and fast recharging for essentials plus a few heavy appliances, without going to the full expandable setup right away. If you want more background, see Home Backup Power Supply: How to Size One for Outages (2026).
Key specs
- High-output inverter suited to running a refrigerator, well pump and HVAC blower together
- Large LFP battery capacity with expansion options
- Multiple 120V outlets and additional high-power outputs
- Rapid AC recharge reported by owners as a major time saver
Pros
- Fast recharge shortens the window of dependence on a generator
- Handles surge loads from motors better than most mid-size units
- Good balance of output and capacity for mid-size homes
Cons
- Runtime for full-house loads is limited without added batteries
- Premium pricing tier compared with simpler power stations
EcoFlow Delta Pro
The original Delta Pro is a practical choice for homeowners who want expandable whole-circuit backup and are comfortable with a slightly lower output ceiling than the newer models. For a deeper look, 3 Best Power Banks for Home Backup in 2026: Picks Compared covers this in detail.
Key specs
- Expandable LFP battery system
- Large continuous AC output for multiple household circuits
- Several AC outlets and DC outputs for mixed loads
- Compatible with solar input for recharging during extended outages
Pros
- Mature design with a long record of owner use
- Expansion keeps runtime options open
- Good for refrigerator, CPAP and sump pump loads simultaneously
Cons
- Lower surge headroom than the newest model for large motors
- Heavy enough that moving it around is not casual
Bluetti AC300 with B300 Battery
This modular system suits homeowners who want to start with a moderate backup capacity and add battery modules as their needs or budget grow. It is a good fit for planning a phased build-out.
Key specs
- Modular power station core with separate expansion battery modules
- Multiple AC outlets and a transfer-ready design for home integration
- LFP chemistry rated for many charge cycles
- Compatible with solar input for off-grid recharging
Pros
- Phased expansion lets you match capacity to your budget and needs
- Strong for essentials plus moderate appliances
- Owners often report straightforward setup for basic backup
Cons
- Full whole-home coverage requires several battery modules
- Integration with existing household wiring typically needs a licensed electrician
Anker SOLIX F3800 Plus
A strong option for homeowners who need split-phase 240V output for appliances such as electric dryers, well pumps and central HVAC equipment, and who want expandable storage alongside that capability.
Key specs
- Split-phase 240V output capability alongside standard 120V outlets
- Expandable battery capacity
- Designed for home backup and whole-circuit integration
- Fast-charge input options from grid and solar
Pros
- 240V capability covers appliances many portable units cannot run
- Expandable storage supports longer outages
- Well suited to homes with mixed 120V and 240V loads
Cons
- Correct 240V connection requires careful wiring and a qualified electrician
- Large footprint and weight for a portable-style unit
Jackery Explorer 3000 Pro
This is a sensible pick for smaller or mid-size households that mainly need to keep a refrigerator, CPAP, lights and a router running during outages, without the expense of whole-home architecture.
Key specs
- LFP battery capacity in the mid-3,000 watt-hour range
- Continuous AC output suitable for refrigerators and medical devices
- Multiple AC and USB outlets
- Solar input for extended recharging
Pros
- Good runtime for essentials in a single portable unit
- Simple setup and operation
- Well suited to CPAP and refrigerator backup
Cons
- Not designed to carry a whole house at once
- Surge capacity limits large motor starts
Bluetti EB3A
A budget essentials pick for apartments, condos or a single room, suitable for keeping a few small devices and a CPAP machine running during short outages.
Key specs
- Compact battery capacity in the low-watt-hour range
- Continuous AC output for small appliances
- Multiple outlets and USB ports
- Quick recharge from wall power
Pros
- Small and light enough to move easily
- Simple, low-maintenance setup
- Good for CPAP and phone charging
Cons
- Limited runtime for refrigerators and sump pumps
- Not appropriate as a whole-home solution
Jackery Explorer 1000 Pro
A compact choice for short outages where the priority is a refrigerator, lights, a router and a CPAP. It works best for households that can accept limited runtime in exchange for portability. Worth reading next: Home Power Backup Solutions: A Step-by-Step Guide to Sizing for Outages.
Key specs
- Mid-size LFP battery capacity around 1,000 watt-hours
- Continuous AC output suitable for common household essentials
- Multiple AC and USB outlets
- Solar input compatibility
Pros
- Portable enough to move between rooms or vehicles
- Good for CPAP and refrigerator backup for several hours
- Straightforward controls
Cons
- Runtime is short for multi-day outages
- Cannot start large motors like sump pumps reliably under heavy load
Buying Guide
Selection criteria
Start with a load list, not a product. Add up the running watts of every device you want to keep on, then add the surge watts for motor-driven appliances like refrigerators, well pumps and sump pumps. Multiply your daily load by the number of hours you expect to need power, and add a 20 percent buffer for inverter losses. That number, in watt-hours, is your minimum battery target. Our approach to ranking was to weigh how well each unit meets that math, along with how it handles surges and how easy it is to recharge.
For a deeper look at the calculation, see How to Measure Appliance Power Consumption for Solar Generator Sizing.
Important features
- Capacity (watt-hours): Determines how long loads run before the battery is empty.
- Continuous output (watts): The steady load the inverter can supply.
- Surge rating: The short burst needed to start motors. A refrigerator may need several times its running wattage at startup. See Surge vs Continuous Power: What Your Solar Generator Can Actually Start.
- Outlets: Count the 120V outlets, and check for 240V if you have a dryer, range or central HVAC.
- Transfer capability: Whether the unit can connect to your home circuit safely, which usually requires an electrician.
- Battery chemistry: LFP batteries generally offer more charge cycles than other lithium types. See LiFePO4 vs Lithium-Ion (NMC): Which Battery Is Better in a Power Station?
Specs to check
Read the manufacturer’s listed continuous output, surge rating, battery capacity, charge input limits and operating temperature range. Confirm the number of AC outlets and whether any are 240V. Check the maximum solar input voltage if you plan to add panels, since mismatched panel voltage can damage a unit. For solar pairing details, see Solar Panel Compatibility With Power Stations: Voltage, Connectors and MPPT Limits.
Choosing by need
- Essentials only (fridge, CPAP, lights, router): A 1,000 to 3,000 watt-hour unit is often enough for a day or two.
- Essentials plus a well pump or sump pump: Prioritize surge headroom and a larger battery.
- Whole-home or near-whole-home: Look at expandable systems with 240V output and plan for a transfer switch installed by a licensed electrician. Compare the approach described in Home Backup With a Solar Generator: What It Can Power and How to Connect Safely and Portable Solar Generator vs Home Battery System.
Things to watch out for
- Advertised capacity is usually the rated figure; real runtime is lower once inverter losses and temperature effects are included.
- Do not back-feed a home circuit through a standard outlet. Use a properly installed transfer switch.
- Cold temperatures reduce usable battery capacity, and many lithium units restrict charging below freezing.
- Keep the unit ventilated and do not block its fans. See Lithium Battery Safety for Portable Power Stations.
Electrical work on a home circuit should be done by a licensed electrician, and medical equipment decisions should be confirmed with your doctor or equipment supplier.
FAQ
Can an ecoflow delta pro ultra whole-home backup power setup run my entire house?
Usually not all at once. Most homes have loads, such as central air conditioning and electric ranges, that exceed what a single portable unit can supply. A practical approach is to back up essential circuits through a transfer switch, and prioritize refrigeration, heating or cooling, medical equipment and lighting.
How many watt-hours do I need for an overnight outage?
Add up the watts of the loads you plan to run, multiply by the hours of outage you want to cover, then add about 20 percent for losses. A refrigerator averaging around 150 watts for 12 hours uses roughly 1,800 watt-hours before losses, so plan accordingly.
Can I run a CPAP machine on a power station?
Many CPAP machines draw modest power, and a power station can often run one for a full night. Check your machine’s wattage and consult your doctor or equipment supplier. See Using a Solar Generator or Power Station for a CPAP Machine.
Will a sump pump work on a portable unit?
It can, but motor startup surge is the main challenge. Choose a unit with surge headroom above the pump’s startup rating and test your setup before a storm. You may also like 5 Best Emergency Power Backups for Home Picks Compared (2026).
Do I need solar panels for backup power?
Solar is optional but extends runtime during long outages. Without it, you rely on the battery and any generator or grid recharge. See Using a Solar Generator During a Power Outage: A Practical Plan.
Is a 240V outlet necessary for a whole-home setup?
If you have 240V appliances such as a dryer, electric range or central AC, yes. Check how your home is wired and see Power Station AC Outlets Explained: 120V, TT-30 RV and 240V.
How long do lithium power station batteries last?
Manufacturers typically specify cycle counts for LFP batteries, and owners often report long service life with moderate temperatures and avoiding deep discharges. Check the specification for each model. Worth reading next: 6 Best Whole Home Backup Power Generator Options for Outages (2026).
Conclusion
For most homeowners, ecoflow delta pro ultra whole-home backup power planning comes down to matching watt-hours and surge output to a real load list. The flagship EcoFlow Delta Pro Ultra and Delta Pro 3 suit those aiming for the broadest coverage. The original EcoFlow Delta Pro and Bluetti AC300 with B300 battery fit homes that want expandable capacity at a moderate scale. The Anker SOLIX F3800 Plus is the pick when 240V appliances are part of the plan. For essentials only, the Jackery Explorer 3000 Pro and Explorer 1000 Pro cover refrigerators and CPAP machines, while the Bluetti EB3A suits a single room. Whichever unit you choose, have a licensed electrician handle any transfer switch or panel integration.
About Emily Parker
Emily Parker is part of our editorial team and reviews and edits our solar generators for home backup & emergencies guides, checking product details against manufacturer specifications and owner feedback.
