EcoFlow DELTA Pro Ultra
The No.1 Movable Whole-home Backup Battery
Month-long power security.
6-30kWh Capacity
Take home power dependability to another level with up to 30kWh battery capacity. For a standard household, that's over 30 days of essential backup power to keep appliances like lights and refrigerators running strong (time may vary). Stackable and space-saving, it packs comfortably into a garage or utility closet.
* Backup time depends on the appliances used
One Unit Covers Every Appliance.
6900W AC | 230V Output
With a 6.9kW output, EcoFlow DELTA Pro Ultra effortlessly runs even energy-hungry household items, like a 3-ton central air conditioner.
One Hour Of Solar For One Day Of Power.
5.6kW Solar Input
By leveraging High and Low-PV technologies, a single inverter sets new portable solar input standards with a 5.6kW input. Whether you prefer a portable setup or a rooftop solar system, you can achieve true energy independence.
5 Ways to Quickly Refill So You're Always in Charge
You're spoilt for choice with EcoFlow DELTA Pro Ultra's charging options. As well as all our usual methods, like solar and the grid, you can now power up using a gas generator or even your EV charging pile. With the industry's fastest charging speeds of 8800W, top up two batteries in only 2 hours.
You Won't Even Notice The Grid Was Down.
<20 ms Downtime, 0 dB Silent Backup
Imagine a world where power outages go unnoticed. With EcoFlow DELTA Pro Ultra's online UPS, you'll get just that. With uninterrupted power flow, EcoFlow DELTA Pro Ultra safeguards your vulnerable electronic equipment around the clock. For extended outages, you don't want to hear your backup in the background, so for low draws under 2000W*, it's completely silent.
* For a maximum of 30 minutes.
Peace of Mind with an Advanced Design
Peace of Mind with an Advanced Design
Powers Through the Most Challenging Situations
EcoFlow DELTA Pro Ultra tackles even the most gruelling conditions. Whether it's extreme weather or freezing winters, this giant safeguards your power security, just like usual.
Operating temperatures: -20 °C to 45 °C
290V high voltage tolerance
IP54 dustproof and splashproof*IP54 rating applies only when all ports are properly covered.
What's in the box
What's in the box
Specs - DELTA Pro Ultra (Inverter)
Dimensions
Inverter: 690 × 481 × 214 mm (27.2 × 18.9 × 8.4 in)
Gross Weight
41.7 kg (91.9 lb)
Net Weight
32.1 kg (70.8 lb)
Maximum Battery Capacity
6 kWh (6144 Wh)
Maximum Expandable Capacity
30 kWh (6144 Wh x 5)
PV Input
High-PV Input: 80-450V-15A 4000W Max
Low-PV Input: 30-150V-15A 1600W Max
AC Input
Charging/Bypass: 200-240V~12.5A, 50/60Hz
Power Input/Output
200-240V~30A, 50/60Hz 6900W Max
AC Output
Discharge : 230V 50Hz 6900W total, 13A(×4) Max per port, 30A(×1) Max per port
Bypass: 220-240V 50/60Hz 2900W total, 12.5A(×5) Max per port
DC Output
12.6V⎓30A, 378W max
USB Ports
USB-C: 5/9/12/15V-3A 20V-5A 100W(×2) Max per port, total 200W
USB-A: 5V-2.4A 12W(×2) Max per port, total 24W
Temperature Range
Charging：-20~45℃(-4~113℉)
Discharging：-20~45℃(-4~113℉)
Storage: -20~45℃(-4~113℉)
Operating Humidity
≤90%
Maximum Operating Altitude
≤3000m (9842 ft)
Noise Level
<=30dB
UPS
< 20ms
Communication Method
Wifi 2.4GHz / Bluetooth 5.0
Ingress Protection Rating
IP54
*IP54 rating applies only when all ports are properly covered.
Monitoring Mode
LCD
Warranty Period
5 Years
Specs - Delta Pro Ultra (Extra Battery)
Model
EFYJ751-BP
Name
Rechargeable Li-ion battery pack
Net Weight
50.7 kg (111.8 lb)
Dimensions
660 × 455 × 204 mm (26 × 18 × 8 in.)
Capacity
102.4V⎓60A, 6,144Wh
Cell Material
LFP
Cycle Life
The battery maintains 80%+ SOH (state of health) after 3,500 cycles at 0.5C/0.5C at 25°C (77°F)
Protection type
Overvoltage protection, overload protection, overtemperature protection, short circuit protection, low temperature protection, low voltage protection, overcurrent protection
Temperature
Discharging temp: −20°C to 45°C (−4°F to 113°F)
Charging temp: −20°C to 45°C (−4°F to 113°F)
Storage temp: −20°C to 45°C (−4°F to 113°F) (optimum: −20°C to 45°C(68°F to 86°F))
Altitude
≤3,000 m (9,842 ft.)
IP Rating
IP54
*IP54 rating applies only when all ports are properly covered.
FAQ
Charging: -20℃～45℃ (-4℉-113℉)
Discharging: -20℃～45℃ (-4℉-113℉)
(No derating below 40℃/104℉).
6144Wh, 102.4V, 32S3P, lithium iron phosphate (LiFePO4) battery.
Over-temperature protection, under-temperature protection, over-discharge protection, overcharge protection, overload protection, short-circuit protection, overcurrent protection.
5V, 9V, 12V, 15V, 20V, 5A, 100W Max (*2)
Minimum display power: 1W
Supported protocols: BC1.2, DCP, APPLE 2.4A, QC2.0, QC3.0, PD2.0, PD3.0
5V/2.4A, 12W (*2)
Minimum display power: 1W
Supported protocols: BC1.2, DCP, APPLE 2.4A, SAMSUNG 2A
No, the battery pack must be charged through the inverter.
It supports hot-swapping with no safety risk. When multiple battery packs are connected, removing one battery pack (not the one connected to the inverter) will not interrupt the output.
Both can be used normally.
Due to stacking methods and wire losses, the design supports only five battery packs.
It can be used normally with humidity up to 93%.
The DELTA Pro Ultra has a reserved DC input port. If the wind turbine output parameters are within our PV input range, it can be used normally.
The error typically occurs in humid environments when solar panels are placed on the ground and charged via PV and AC simultaneously.
To resolve: 1. Place the solar panels at least 1.5 meters above the ground, such as on a roof or rack. 2. Avoid using solar panels in stormy weather and keep them dry. 3. Avoid simultaneous AC and PV charging in damp environments.
The issue has been fixed in firmware version 5.0.0.49 (Puerto Rico users are not allowed to upgrade to this version).
The battery management system periodically calibrates the SOC. During calibration, the SOC limit is ignored, and the battery may be charged to 100%. This calibration occurs every month or after 30 charge/discharge cycles. This is normal logic.
No, the 50A hub does not support mixed parallel connections; it can only connect 2 DELTA Pro Ultras or 2 DP3 units for parallel operation.
