EcoFlow DELTA Pro Ultra + DELTA Pro Ultra Extra Battery (1 × Inverter + 3 × Batteries)

18.4kWh Capacity | 7.2kW Continuous Output | 120V/240V Power | Up to 5.6kW Solar Input | Expandable to 30kWh | Whole-Home Backup

The EcoFlow DELTA Pro Ultra + DELTA Pro Ultra Extra Battery (1 × Inverter + 3 × Batteries) combines 1 × DELTA Pro Ultra Inverter with 3 × DELTA Pro Ultra Batteries to create a high-capacity home backup and energy-storage system. With 18,432Wh of total battery capacity and 7,200W of continuous AC output, this configuration is designed for extended outages and demanding household loads. EcoFlow positions this configuration as providing approximately 6–7 days of whole-home power, depending on household energy consumption.

18.4kWh of High-Capacity Energy Storage

Each DELTA Pro Ultra Battery provides 6,144Wh, giving this three-battery configuration a combined 18,432Wh of energy storage.

The large battery reserve provides substantially longer runtime than a single-battery configuration, making it ideal for homeowners who need dependable power during extended blackouts, severe weather, and grid interruptions.

7.2kW of Continuous Power

The DELTA Pro Ultra Inverter delivers up to 7,200W of continuous AC output, with up to 10,800W of surge output.

This high output allows the system to support demanding household appliances and essential home systems, including refrigerators, freezers, lighting, kitchen appliances, computers, networking equipment, and compatible HVAC loads.

120V & 240V Power for Your Home

The DELTA Pro Ultra provides pure-sine-wave 120V/240V AC output, giving you the flexibility to power both standard household electronics and compatible 240V appliances.

This makes the system suitable for comprehensive residential backup applications where multiple types of household loads need to remain operational.

Keep Your Home Running During Extended Outages

With approximately 18.4kWh of stored energy, this configuration is designed for significantly longer backup operation than smaller power stations.

EcoFlow lists the three-battery configuration as providing approximately 6–7 days of whole-home power, although actual runtime will vary according to household consumption and the appliances being powered.

Power High-Demand Household Appliances

With 7,200W of continuous output, DELTA Pro Ultra can handle a wide variety of demanding residential loads.

Depending on appliance requirements and installation configuration, power compatible:

• Central air conditioning
• Refrigerators and freezers
• Washing machines
• Kitchen appliances
• Lighting systems
• Televisions
• Computers and workstations
• Wi-Fi routers and networking equipment
• Communication equipment
• Other compatible 120V and 240V appliances

Expandable Up to 30kWh

This configuration starts with 18,432Wh of battery capacity and can be expanded further.

A single DELTA Pro Ultra Inverter supports up to 30kWh using five DELTA Pro Ultra Batteries, allowing you to add additional compatible batteries as your energy requirements increase.

Harness Up to 5.6kW of Solar Energy

The DELTA Pro Ultra Inverter supports up to 5,600W of solar charging input across its two solar inputs.

The system supports a 4,000W maximum high-PV input and a 1,600W low-PV input, providing flexibility when designing a compatible solar array.

Solar Charging for Longer Backup

When paired with compatible solar panels, the three-battery system can use sunlight to replenish stored energy during the day.

This can help extend backup runtime during prolonged outages and reduce dependence on grid electricity or fuel-based generators.

Multiple Ways to Recharge

DELTA Pro Ultra supports multiple charging options, providing flexibility during both normal operation and emergencies.

Depending on the system configuration, recharge the battery bank using AC power, solar energy, generators, and other supported charging solutions.

Long-Lasting LFP Battery Technology

All three DELTA Pro Ultra Batteries use Lithium Iron Phosphate (LFP) battery chemistry.

EcoFlow specifies 80% remaining capacity after 3,500 charge cycles, providing a durable energy-storage platform designed for long-term use. 

0ms Online UPS

For compatible equipment, DELTA Pro Ultra provides 0ms Online UPS operation, while Backup UPS switching is specified at under 20ms.

This makes the system suitable for sensitive electronics such as computers, networking equipment, and other devices that benefit from uninterrupted power.

X-Fusion Technology for Stable Power

EcoFlow's X-Fusion technology is designed to provide consistent power output even as household loads change.

The inverter maintains up to 7,200W of continuous output, providing a stable source of electricity for compatible household equipment.

Quiet Operation

The DELTA Pro Ultra is designed to operate quietly when power demands are lower.

EcoFlow specifies 0dB operation below 2,200W, helping minimize noise while powering lighter household loads.

Automatic Battery Self-Heating

The DELTA Pro Ultra Batteries support automatic self-heating for cold-weather operation.

The batteries can activate their heating function when temperatures fall below 32°F, helping maintain suitable operating conditions in colder environments.

Automatic Whole-Home Backup

Pair the DELTA Pro Ultra system with the EcoFlow Smart Home Panel 2 for integrated whole-home backup.

When properly installed, the Smart Home Panel 2 can automatically switch supported home circuits to battery power when utility electricity fails, helping keep essential systems running without manually connecting individual appliances.

UL 9540 & UL 1973 Certified

The DELTA Pro Ultra platform is certified to UL 9540 and UL 1973, providing recognized safety certification for the energy-storage system and battery components.

This makes it suitable for residential energy-storage applications where certified equipment is required.

Reliable Power Without Fuel

The DELTA Pro Ultra operates using stored battery energy without requiring gasoline or diesel during battery operation.

It produces no combustion exhaust while operating from its batteries and provides quiet backup power for residential environments.

When charged with solar energy, it can also serve as a renewable-energy backup solution.

Designed for Extended Power Outages

The 18.4kWh configuration is particularly well suited for homeowners preparing for longer-lasting power interruptions.

Use it for:

• Extended blackouts
• Severe weather
• Grid interruptions
• Emergency preparedness
• Whole-home backup
• Solar energy storage
• High-demand household loads
• Greater energy independence

Smart Home Energy Management

When integrated with compatible EcoFlow equipment, DELTA Pro Ultra can support smart energy monitoring and management.

Through the EcoFlow ecosystem, homeowners can monitor energy usage and better manage available stored power.

Modular & Stackable Energy Storage

The DELTA Pro Ultra system uses a modular design that allows multiple batteries to be connected to a single inverter.

With three batteries already included, this configuration provides a substantial storage foundation while leaving room to expand toward the 30kWh single-inverter maximum.

Ideal for Whole-Home Backup

The combination of 18.4kWh storage and 7.2kW output provides a strong balance of energy capacity and power for residential backup.

Whether you're protecting essential appliances or preparing for multi-day outages, this configuration provides the stored energy and output needed for demanding home backup applications.

Important Installation Consideration

For automatic whole-home backup, the EcoFlow Smart Home Panel 2 and appropriate electrical installation are required.

Whole-home electrical integration should be completed according to applicable local electrical codes and by a qualified professional where required.

Smart Home Panel 2, solar panels, and certain installation or connection accessories may be sold separately depending on the package.

What's Included

• 1 × EcoFlow DELTA Pro Ultra Inverter
• 3 × EcoFlow DELTA Pro Ultra Batteries
• 1 × Portable Stand
• 1 × Disassembly and Assembly Tool
• 1 × Solar-to-Low-PV Port Charging Cable
• 1 × C20 AC Charging Cable
• 3 × Battery Connection Cables
• User Documentation
• Safety Documentation
• Warranty Documentation

Technical Specifications

• Configuration: 1 × Inverter + 3 × Batteries
• Individual Battery Capacity: 6,144Wh
• Total Battery Capacity: 18,432Wh
• Continuous AC Output: 7,200W
• Maximum Surge Output: 10,800W
• AC Output: 120V/240V, 60Hz
• Solar Input: Up to 5,600W
• High-PV Input: Up to 4,000W
• Low-PV Input: Up to 1,600W
• Battery Chemistry: LFP
• Cycle Life: 80% capacity after 3,500 cycles
• Expandable Capacity: Up to 30kWh with one inverter
• UPS: Backup UPS <20ms; Online UPS 0ms
• Protection Rating: IP54
• Connectivity: Wi-Fi, Bluetooth & 4G
• Whole-Home Integration: Compatible with EcoFlow Smart Home Panel 2
• Operating Temperature: -4°F to 113°F
• Warranty: 5 years

Complete Extended-Backup Power Solution

The EcoFlow DELTA Pro Ultra + DELTA Pro Ultra Extra Battery (1 × Inverter + 3 × Batteries) combines 18,432Wh of battery capacity, 7,200W of continuous output, 120V/240V power, up to 5.6kW of solar input, LFP battery technology, 0ms Online UPS capability, and expandable storage up to 30kWh into a powerful whole-home energy solution.

With its substantial battery capacity and modular design, this configuration is built for homeowners who want reliable protection against extended outages, severe weather, grid interruptions, and increasing energy demands.

5-Year Warranty

The EcoFlow DELTA Pro Ultra system is backed by a 5-year manufacturer warranty, providing additional peace of mind for your long-term home backup and energy-storage investment.