Kit: EcoFlow Delta Pro Ultra 6kWh Portable Energy Storage
In a set
Drone service
Rental
Reliability
Trust
Own warehouse 
Warranty
EcoFlow DELTA Pro Ultra 6kWh Portable Power Station Set
Be ready for unexpected outages, cut your electricity costs, and keep essential devices running no matter what. This set includes the EcoFlow DELTA Pro Ultra inverter and a 6kWh battery, creating a powerful, flexible, and scalable portable power solution for home backup, off-grid use, travel, and hobby applications. With up to 6900W output power, solar input up to 5600W, and a fast online UPS function, it is built to handle demanding devices and long runtime with ease.
Why choose the EcoFlow DELTA Pro Ultra 6kWh set?
- Powerful 6900W continuous output and up to 10300W surge power
- 6kWh battery capacity, expandable up to 30kWh
- Dual PV input with up to 5600W solar charging
- Online UPS with switch-over in under 20 ms
- Multiple charging methods for maximum flexibility
- Quiet operation and modular design for easier transport and setup
- IP54 protection and operation in temperatures from -20°C to 45°C
- App control via Wi-Fi and Bluetooth
Up to 6900W of power – runs almost anything
Thanks to X-Fusion technology, the EcoFlow DELTA Pro Ultra delivers up to 6900W continuous output and as much as 10300W peak power for up to 10 seconds, even while charging. That means it can comfortably power multiple high-demand appliances at the same time, including washing machines, dryers, heat pumps, air conditioners, refrigerators, and more.
Expandable up to 30kWh
Each DELTA Pro Ultra EB battery offers 6kWh capacity, giving you hours of reliable backup energy. Need more? The system can be expanded with up to five battery units for a total of 30kWh. The modular design makes expansion quick and convenient, without the need for specialized tools.
Efficient solar power system – up to 5600W PV input
The DELTA Pro Ultra inverter features two PV inputs: a low-voltage input up to 150V and a high-voltage input up to 450V. This allows you to connect a larger solar setup and achieve up to 5600W total solar input (4000W + 1600W). Use clean solar energy to power your devices, reduce grid dependence, and save on utility bills.
Multiple charging options for maximum flexibility
The EcoFlow DELTA Pro Ultra offers several charging methods, so you can top up power in the way that best suits your situation. Charge it using solar panels, an EV charging station, a generator, or a standard wall outlet. It also supports dual charging from two sources at once (PV + grid), reaching up to 8800W maximum input. Fast charging means less waiting and more readiness when you need power most.
Easy home integration
When paired with the separately sold Manual Transfer Switch (MTS), the DELTA Pro Ultra can support your home power system more effectively. This makes it easier to switch between grid electricity and stored EcoFlow energy, helping you use stored solar energy during the evening or at night and adding peace of mind during blackouts.
Reliable UPS backup power
Power outage? No problem. The DELTA Pro Ultra supports an online UPS function with switching in less than 20 ms. This helps keep critical devices such as a fridge, desktop computer, or other important electronics running without interruption during sudden outages.
Smart control with the EcoFlow app
The dedicated EcoFlow app gives you full control over your energy system in real time. Monitor power consumption, battery level, and performance stats, automate charging and discharging schedules, switch operating modes, and optimize the entire setup. The app also works with selected smart home ecosystems and compatible brands such as Google, Shelly, Tapo, and Kasa Smart.
Built for demanding conditions
The EcoFlow DELTA Pro Ultra is ready for year-round use. It supports self-heating, operates in temperatures from -20°C to 45°C, and features X-Cooling for better thermal management. With an IP54 rating, it is protected against dust and splashes. The high-quality LFP battery also offers long service life, supported by an advanced BMS and SOC cell balancing technology.
Thoughtful design and impressively quiet operation
This system fits naturally into many environments, from homes and vacation cabins to garages, workshops, events, and travel setups. Its modular design and optional transport cart make moving it much easier. Another major advantage is its very quiet performance: at loads below 2000W, the noise level is 0 dB, and even under heavier use it stays below 30 dB—about as quiet as a whisper.
Save more on electricity bills
The DELTA Pro Ultra system can also help reduce everyday electricity costs. Its self-powered mode prioritizes solar energy first and only draws from the grid when needed. Combined with customizable charging and discharging schedules, this makes it easier to lower grid consumption and make better use of your available energy.
What’s in the box
- Inverter
- Portable base
- Support feet ×4
- M6*20 screws ×4
- Side wheels ×4
- Assembly and disassembly tool
- EcoFlow Solar to Low-PV port cable
- AC charging cable
- User manual and warranty card
- DELTA Pro Ultra EB battery
- Battery connection cable (0.2 m)
Technical specifications – Inverter
| Dimensions | 690 × 481 × 214 mm |
|---|---|
| Gross weight | 41.7 kg |
| Net weight | 32.1 kg |
| Single battery capacity | 6 kWh (6144 Wh) |
| Maximum expandable capacity | 30 kWh (6144 Wh ×5) |
Technical specifications – Battery
| Model | EFYJ751-BP |
|---|---|
| Name | Rechargeable Li-ion battery pack |
| Weight | 50.7 kg |
| Dimensions | 660 × 455 × 204 mm |
| Capacity | 102.4 V = 60 Ah, 6144 Wh |
Inputs
| PV input (High-PV) | 80–450 V, 15 A, 4000 W max. |
|---|---|
| PV input (Low-PV) | 30–150 V, 15 A, 1600 W max. |
| AC input | Charging/Bypass: 200–240 V, 12.5 A, 50/60 Hz |
| Input/output current | 200–240 V, 30 A, 50/60 Hz, 6900 W max. |
Outputs
| AC output EU | 230 V, 50 Hz, 6900 W total, max. 13 A per port ×4, max. 30 A per port ×1 |
|---|---|
| Bypass mode | 220–240 V, 50/60 Hz, 2900 W total, max. 12.5 A per port ×5 |
| DC output | 12.6 V, 30 A, 378 W max. |
| USB-C ports | 5/9/12/15 V – 3 A, 20 V – 5 A, max. 100 W per port ×2, 200 W total |
| USB-A ports | 5 V – 2.4 A, max. 12 W per port ×2, 24 W total |
Environmental conditions
| Charging temperature | -20°C to 45°C |
|---|---|
| Discharging temperature | -20°C to 45°C |
| Storage temperature | -20°C to 45°C |
| Operating humidity | ≤90% |
| Maximum operating altitude | ≤3000 m |
| Noise level | ≤30 dB |
Other specifications – Inverter
| UPS function | <20 ms |
|---|---|
| Connectivity | Wi-Fi 2.4 GHz, Bluetooth 5.0 |
| Ingress protection rating | IP54 |
| Display | LCD |
| EMC | Class A |
| Warranty | 5 years |
Other specifications – Battery
| Discharging temperature | -20°C to 45°C |
|---|---|
| Charging temperature | -20°C to 45°C |
| Storage temperature | -20°C to 45°C (optimal: -20°C to 45°C) |
| Maximum operating altitude | ≤3000 m |
| Ingress protection rating | IP54 |
Battery
| Cell type | LFP |
|---|---|
| Cycle life | ≥80% SOH after 3500 cycles at 25°C (0.5C/0.5C) |
| Protection features | Overvoltage, overload, overheating, short-circuit, low-temperature, undervoltage, and overcurrent protection |
Specification Kit: EcoFlow Delta Pro Ultra 6kWh Portable Energy Storage
Get expert advice