EcoFlow
DELTA Pro Ultra
A whole-home power platform designed for extended outages and everyday energy use, with modular capacity, high solar input, automatic backup, and quiet operation.
- IIP54 protected
- IPure sine AC output
- ILFP battery chemistry
6-90 kWh
Expandable system capacity
7.2-21.6 kW
Continuous AC output
20 ms
Backup switchover
0 dB
Under 2,200 W
Designed for the modern home
Reliable power without changing how the home feels.
One unit delivers 6 kWh of storage, 7,200 W of output, and up to 5.6 kW of solar input. Pair it with EcoFlow Smart Home Panel 2 for automatic transfer, energy monitoring, and lower electricity costs.
Whole-home backup
Start at 6 kWh and scale up to 90 kWh as energy needs grow.
Uninterrupted power
Backup UPS switches in under 20 ms, while online UPS operation reaches 0 ms.
Quiet by design
A silent 0 dB operating experience under 2,200 W for maximum comfort.
X-Cooling vents
A proprietary cooling structure helps sustain dependable performance.
One system, many energy sources
Built to adapt as your energy strategy evolves.
The stackable system can expand storage and output in minutes and works with energy sources ranging from solar to gas.
- IAutomatic backup with EcoFlow Smart Home Panel 2
- IEnergy-consumption monitoring for better visibility
- IFlexible daily-use and extended-outage operation
- ISolar and generator-ready energy architecture
Inverter
Battery
Communications
Compatibility
EcoFlow DELTA Pro Ultra Inverter
Model EFYJ751-PCS-US
IP54
General information
Product name
Power Station Inverter
Model
EFYJ751-PCS-US
Net weight
Approx. 31.7 kg / 70 lb
Dimensions (W × D × H)
Approx. 690 × 481 × 214 mm (27.2 × 18.9 × 8.4 in.)
IP rating
IP54
Noise level
<30 dB
UPS
Backup UPS <20 ms; online UPS 0 ms
Output
AC output
Discharging only: pure sine, 7,200 W total, 120/240 V~ 60 Hz. Bypass: 100-120 V~ 30 A max, 50/60 Hz.
USB ports
USB-A: 5 V 2.4 A, 12 W max per port, 24 W total. USB-C: 5/9/12/15/20 V 5 A, 100 W max per port, 200 W total.
DC output
12.6 V 30 A, 378 W max
Input
AC input
Charging only: 100-120 V~ 15 A; 200-240 V~ 12.5 A, 50/60 Hz. Bypass: 100-120 V~ 15 A, 50/60 Hz; duration <3 hours when current exceeds 12 A.
Power input/output port
100-120 V~ 30 A, 200-240 V~ 30 A, 50/60 Hz
High-voltage PV input
80-450 V, 15 A max, 4,000 W max
Low-voltage PV input
30-150 V, 15 A max, 1,600 W max
Environment
Discharging temperature
-20°C to 45°C (-4°F to 113°F)
Charging temperature
-20°C to 45°C (-4°F to 113°F)
Storage temperature
-20°C to 45°C (-4°F to 113°F); optimum at 20°C to 30°C (68°F to 86°F)
Altitude
≤3,000 m (≈9,842 ft)
EcoFlow DELTA Pro Ultra Battery
Model EFYJ751-BP
6,144 Wh
Model
Product name
Rechargeable Li-ion battery pack
Model
EFYJ751-BP
Weight
Approx. 50.7 kg (111.8 lbs)
Dimensions
Approx. 660 × 455 × 204 mm (26 × 18 × 8 in.)
IP rating
IP54
Battery
Capacity
102.4 V 60 A, 6,144 Wh
Cell material
LFP
Cycle life
Maintains 80%+ state of health after 3,500 cycles at 0.5C/0.5C and 25°C (77°F).
Protection type
Overvoltage, overload, overtemperature, short-circuit, low-temperature, low-voltage, and overcurrent protection.
Environment
Discharging temperature
-20°C to 45°C (-4°F to 113°F)
Charging temperature
-20°C to 45°C (-4°F to 113°F)
Storage temperature
-20°C to 45°C (-4°F to 113°F); optimum at 20°C to 30°C (68°F to 86°F)
Altitude
≤3,000 m (≈9,842 ft)
Connected control
Multi-protocol communication options
Wi-Fi + 4G
Communications
Method
CAN, Bluetooth, Wi-Fi, Ethernet, and 4G
Wi-Fi
Frequency range: 2,412-2,462 MHz / 2,422-2,452 MHz. Maximum output power: 0.3597 W.
Bluetooth
Frequency range: 2,402-2,480 MHz. Maximum output power: 0.0109 W.
Compatible EcoFlow components
System expansion and home integration
3 products
DELTA Pro Ultra Battery
Stackable 6,144 Wh LFP storage module.
EcoFlow 50 Amp Hub
Accessory compatibility listed for system integration.
Smart Home Panel 1
Compatible whole-home connection hardware.
Build a backup system around your essential loads and energy goals.
Review system sizing, solar input, whole-home integration, and future expansion with a home-energy specialist.