4 Best Battery Backup for Refrigerators

Power outages are a nuisance yet part of reality for most homeowners, so having a reliable battery backup for your refrigerator can safeguard against spoiled food and expensive losses. Whether you need a compact backup for short-term use or a powerhouse solution for prolonged outages, there’s a backup battery option that suits your needs. 

Read on to learn more about EcoFlow’s best battery backup solutions to ensure your refrigerator remains running no matter what happens.

EcoFlow’s Best Battery Backup for Refrigerators

  1. Best For Short-Term Use: EcoFlow DELTA 2  
  2. Best For Cost-Saving: EcoFlow DELTA 2 Max
  3. Best For Portable Home Backup: EcoFlow DELTA Pro
  4. Best For High Power: EcoFlow DELTA Pro Ultra

Best for Short-Term Use: EcoFlow DELTA 2

Even during short periods without power, essential food, drink, or medications that must stay cool can be threatened. For these moments, you need a reliable battery backup to keep everything fresh. The EcoFlow DELTA 2 is perfect for brief power interruptions, and you can even use it as an emergency power supply that can auto-switch on during power failure. 

With intuitive design features like a user-friendly app and rapid recharge capabilities using solar power, it’s an entry-level plug-and-play solution for the average household that may lose power intermittently for shorter periods. 

While one of the less powerful options on this list, it can still power over 90% of appliances and up to 15 at once, thanks to its many ports, including USB, AC, and more. And, you don’t have to worry about the battery becoming overloaded, thanks to X-boost technology, which provides additional surge power as needed.

The EcoFlow DELTA 2 also provides expandable capacity, with the capability of adding an EcoFlow DELTA 2 Extra Battery or EcoFlow DELTA Max extra battery.


  • Storage Capacity (Minimum): 1024Wh
  • Storage Capacity (Maximum): 3kWh
  • AC Output (Maximum): 1.8kW continuous output (2.7kW Surge)
  • Solar Charge Capacity (Maximum): 500W max (11-60V, 15A)
  • Weight: 27 lbs (12 kg)
  • Dimensions: 15.7 x 8.3 x 11.1 in (40 x 21.1 x 28.1 cm)
  • Operating Noise Level: ~50 decibels
  • Charging Options: Solar/AC/Car Charger
  • Battery Chemistry: Lithium Iron Phosphate (LFP/LiFePO4)
  • Cycle Life: 3000 Cycles to +/-80% Capacity
  • Depth of Discharge: 100%
  • Warranty: Five years (no cycle life restrictions) 
  • App Monitoring and Control?: Yes


  • Large capacity but still lightweight and easily portable
  • Fast recharge speeds using clean solar energy
  • Multiple outlets for simultaneous device charging
  • Comes with a 5-year warranty
  • Powers over 90% of home appliances, including full-size refrigerators


  • Not suitable for long-term power outages
  • Smaller capacity compared to other models on this list

Best for Cost-Saving: EcoFlow DELTA 2 Max

The EcoFlow DELTA 2 Max is an environmentally friendly and cost-effective option for home backup of major appliances like a refrigerator. It’s an upgraded and advanced version of the EcoFlow DELTA Max, with new additions of a LiFeP04 battery, WiFi and Bluetooth connectivity, and the capability to support additional devices, including the EcoFlow Glacier Portable Refrigerator, EcoFlow Wave 2 Portable AC, and EcoFlow Smart Generator (Dual Fuel

The upgrade from lithium-ion or LFP battery ensures a longer lifespan, reducing the long-term costs associated with battery replacements for those looking for a financially sound investment.

This affordable yet powerful solution provides up to 3400W output on X-Boost mode, ensuring safety and avoiding overload when first connecting it to a high-power appliance such as a refrigerator. When you’re not using it for the fridge, you’ll also enjoy the fact that it can run up to 99% of home appliances, covering just about any power need.

This backup battery pairs with solar panels 400W or lower and can be fortified with an additional EcoFlow DELTA 2 or EcoFlow DELTA Max Extra Battery for up to 6144Wh of expanded capacity.

With a staggering 99% MPPT efficiency, you’ll rest assured you’re getting the absolute most power when energy is transferred from the solar cell to the battery. The EcoFlow DELTA 2 Max also allows you to maximize solar energy generation by using multiple solar sources simultaneously. And, with six AC outlets on the EcoFlow DELTA 2 Max, you’ll have plenty of access to AC power even when your traditional energy source is down.


  • Storage Capacity (Minimum): 2048 Wh
  • Storage Capacity (Maximum): 6kWh
  • AC Output (Maximum): 2.4kW continuous output (4.8kW Surge)
  • Solar Charge Capacity (Maximum): 11-60V 15A, single port 500W; dual port 1kW
  • Weight: 50.7 lbs  (23 kg)
  • Dimensions: 19.6 × 9.5 × 12 in (49.7 × 24.2 × 30.5 cm)
  • Operating Noise Level: ~50 decibels
  • Charging Options: Solar/AC/Car Charger
  • Battery Chemistry: Lithium Iron Phosphate (LFP/LiFePO4)
  • Cycle Life: 3000 Cycles to +/-80% Capacity
  • Depth of Discharge: 100%
  • Warranty: Five years (no cycle life restrictions)
  • App Monitoring and Control?: Yes


  • High power output for its size with the option to expand capacity
  • Efficient power delivery; high MPPT and can use multiple PV sources
  • Runs almost any home appliance


  • Slightly heavier than the standard DELTA 2
  • Higher initial investment

Best for Portable Home Backup: EcoFlow DELTA Pro

The EcoFlow DELTA Pro provides a comprehensive home backup solution in a highly portable form. On its own, it offers 3.6Wh capacity. Still, it can be expanded up to 25kWh when you chain together two EcoFlow DELTA Pros with an EcoFlow Dual Voltage Hub, offering complete energy independence when turned into a whole-home generator in this way. Its expandable capacity, and solar charging compatibility are perfect for standard and off-grid power needs. 

It’s also compatible with the EcoFlow DELTA Pro Smart Extra Battery, EcoFlow Smart Generator Dual Fuel, and EcoFlow Smart Home Panel. Yet, despite its large output and capacity, it remains portable thanks to a suitcase-style handle and wheels that can move with you as needed.

Simply put, it’s your most affordable whole-home solution for essential appliances. You get the same plug-and-play options as the EcoFlow DELTA 2 but with a much greater capacity to power more for longer. It can charge almost anything, with 7200W of surge output, which is excellent for even heavy-duty appliances like refrigerators, AC units, and more.

View it as an extensively customizable option to suit all your varied home backup needs, whether stationary or on the go. If you’re on the move, you can even recharge it using EV charging stations along your journey.


  • Storage Capacity (Minimum): 3.6kWh
  • Storage Capacity (Maximum): 25kWh
  • AC Output (Maximum): 3.6kW continuous output (7.2kW Surge) 
  • AC Output (Maximum): Expandable to 7.2kW continuous output (14.4 kW surge) with 2 x EcoFlow DELTA Pro + Double Voltage Hub
  • Solar Charge Capacity (Maximum): 3.2kW with 2 x EcoFlow DELTA Pro (16 x 400W Rigid Solar Panels)
  • Weight: 99 lbs (45kg)
  • Dimensions: 25 x 11.2” x 16.4” inches (63.5 x 28.4x 42cm)
  • Operating Noise Level: ~50 decibels
  • Charging Options: Solar/AC/Car Charger/Smart Home Panel/EV Charge Station
  • Battery Chemistry: Lithium Iron Phosphate (LFP/LiFePO4)
  • Cycle Life: 3000 Cycles to +/-80% Capacity
  • Depth of Discharge: 100%
  • Warranty: Five years (no cycle life restrictions)
  • App Monitoring and Control?: Yes


  • Can power an entire home
  • It can integrate into home wiring or work as a standalone
  • Modular design for convenient expansion
  • Recharge it with solar or at EV stations anywhere
  • Powerful yet portable enough for off-grid adventures


  • Relatively heavier and more expensive than the DELTA 2 Max
  • Additional accessories might be needed for full usage potential and aren’t included in the initial cost

Best for High Power: EcoFlow DELTA Pro Ultra

For those who require extensive power backup, the EcoFlow DELTA Pro Ultra delivers extreme battery capacity and output with unparalleled performance. This powerhouse can handle a refrigerator and multiple appliances all at once, making it functional for the most demanding power needs. Whether you’re living on-grid or off-grid, this versatile and impressive battery backup system is the most powerful option you have if energy independence is what you’re after.

Extended blackouts have nothing on you if you have the EcoFlow DELTA Pro Ultra, as it can power your home for up to a month. It can also operate in extreme conditions with a dust and waterproof feature. That, plus its portable and compact nature, makes it easy to take with you for long-term adventures. Whether you charge it with solar panels or simply take advantage of the many EV charging stations worldwide, the EcoFlow DELTA Pro Ultra can go anywhere you go, providing energy the entire time.

If you prefer to stay put, you’ll enjoy the EcoFlow DELTA Pro Ultra, which can connect to your on-grid energy system and even align with net metering programs. This allows you to make the most of your system and potentially save money in the process.


  • Storage Capacity (Minimum): 6kWh
  • Storage Capacity (Maximum): 90kWh
  • AC Output (Maximum): 7.2kW continuous output and 10.8kW peak output for 10 seconds. 
  • AC Output (Maximum): AC output expandable up to 21.6kW with three inverters connected.
  • Solar Charge Capacity (Maximum): 16.8kW with 3 inverters and 42 x 400W Rigid Solar Panels
  • Weight: Inverter: 70 lbs (32.7kg); Battery: 116.4 lbs (52.8kg)
  • Dimensions: Inverter: 27.2 x 18.9 x 8.4 in (69.1 x 48 x 21.3 cm); Battery: 26 x 18 x 8 in (66. x 45.7 x 20.3 cm)
  • Operating Noise Level: ~50 decibels
  • Charging Options: Solar/AC/Car Charger/Smart Home Panel/EV Charge Station
  • Battery Chemistry: Lithium Iron Phosphate (LFP/LiFePO4)
  • Cycle Life: 3000 Cycles to +/-80% Capacity
  • Depth of Discharge: 100%
  • Warranty: Five years (no cycle life restrictions)
  • App Monitoring and Control?: Yes


  • Massive battery storage capacity ideal for whole home backup
  • Can power multiple large appliances simultaneously
  • Charge with solar, AC, generator, or even EV charging
  • Long-lasting and durable battery and body


  • Bulky and not as portable as other models, especially when fully expanded
  • Significantly higher cost than smaller models

What Is Battery Backup for a Refrigerator?

A battery backup for a refrigerator is a standalone power supply unit that kicks in during outages to ensure your fridge continues to function, keeping your food fresh and safe. It’s usually a generator or battery backup that can draw energy from something not reliant on the grid, such as solar energy or propane.

Why Do You Need A Battery Backup Solution for Your Refrigerator?

The importance of maintaining a cold environment in your refrigerator cannot be overstated, especially for individuals who store perishables for extended periods. This may include food, drinks, or essential medications that must be kept cold. Battery backups offer a sense of security and ensure the continued operation of your fridge during power disruptions that may last anywhere from a few minutes to many weeks.

What To Consider Before Choosing a Battery Backup for Your Refrigerator

Selecting the right battery backup should involve a comprehensive assessment of your specific needs and the different ways a battery backup can meet them.

Refrigerator Power Requirements

Refrigerators vary in size and power consumption, so know your fridge’s wattage rating before choosing a battery backup. This information can usually be found on the manufacturer’s label or manual. A higher wattage rating means you’ll need a larger capacity and output for your battery backup to ensure proper operation.

Battery Capacity

The capacity of a battery determines how much energy it can store and deliver. A higher-capacity battery will provide longer backup time for your refrigerator. Considering the initial and sustained refrigeration power needed in case of extended outages is essential.

Battery Type

The most common types of batteries used for backup solutions are lead-acid, lithium-ion, and nickel-cadmium. They differ in terms of cost, capacity, and lifespan. Lithium-ion batteries, specifically LiFeP04, are often preferred due to their higher energy density and longer lifespan.


The weight of a battery backup is an essential factor to consider if you plan on moving it around frequently or in case of emergencies. Heavier batteries may be more challenging to transport but generally offer larger capacities, so weigh the two factors to find the right balance.

Recharge Options

The recharge options for a battery backup vary depending on the type and manufacturer. Some models can be recharged using solar panels, AC power outlets, generators, or EV charging stations. The more recharge options you have, the more assurance there is that you’ll always have the energy needed to keep your battery up and running. Consider your access to these charging options when choosing a battery backup.

Convenience of Control and Monitoring Features

Some battery backups, like the EcoFlow models listed above, come with advanced control and monitoring features that track usage and battery life and even remotely control the unit through a smartphone app. These features add convenience and peace of mind to your backup solution.

Silent Operation

When choosing a battery backup, consider its noise level during operation. Generators that run on gasoline or propane are pretty noisy, while solar batteries offer a much quieter option that flies under the radar. If you’re bothered by noise or have neighbours you’re considering, opt for a quiet and clean-energy solar battery.

Frequently Asked Questions

Can a Refrigerator Be Plugged into a Battery Backup?

Yes, most household refrigerators can be safely plugged into a battery backup. To ensure a good fit, match the refrigerator’s power requirements with a battery backup that has an output and capacity to sustain it. Choose a battery whose output (including surge) exceeds the refrigerator’s requirements to avoid overloading it.

How Long Will a Battery Backup Run a Refrigerator?

The runtime of a battery backup depends on the fridge type, the power draw, and the battery capacity. Smaller models might offer several hours of operation, while larger ones like the EcoFlow DELTA Pro Ultra can provide up to a whole month of sustained energy.

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Final Thoughts

Investing in a quality battery backup for your refrigerator provides insurance for your food and peace of mind during emergencies. Given the various EcoFlow options available, it’s clear that each homeowner can find a suitable solution tailored to their needs, whether it’s for short outages, portable adventures, or long-term blackouts. 

Explore the full range of EcoFlow’s portable power stations to find the right solution for you.

EcoFlow is a portable power and renewable energy solutions company. Since its founding in 2017, EcoFlow has provided peace-of-mind power to customers in over 85 markets through its DELTA and RIVER product lines of portable power stations and eco-friendly accessories.


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