EcoFlow DELTA Pro Ultra Power Station Inverter (070740, EFDeltaProUltra-EU)

EcoFlow DELTA Pro Ultra Portable Inverter

Prepare for unexpected power outages, reduce your electricity bills, and ensure that your home appliances keep running no matter the circumstances. The EcoFlow DELTA Pro Ultra is an inverter that, when paired with one or more batteries (sold separately), becomes a powerful portable power station. It is a flexible and scalable energy solution with impressive performance, capable of supplying selected devices with electricity for extended periods. With very high output power (up to 6,900 W), photovoltaic compatibility (up to 5,600 W), and an online UPS (Uninterruptible Power Supply) function, it is well suited even for the most demanding applications. It is an ideal choice for users who want to reduce their dependence on the grid or secure their home against power outages. Please note that the inverter operates only when connected to a battery.

Up to 6,900 W of power – runs almost anything

Thanks to X-Fusion technology, the DELTA Pro Ultra delivers continuous output power of up to 6,900 W and peak power of up to 10,300 W (for up to 10 seconds), even while charging. This means it can easily power several high-demand devices at the same time, including washing machines, dryers, heat pumps, and air conditioners.

Scalable up to 30 kWh – tailor the system to your needs

The inverter works with DELTA Pro Ultra EB batteries (sold separately). Each battery offers a capacity of 6 kWh, providing many hours of power for essential equipment. Need more energy? You can connect up to five battery units, reaching a total capacity of up to 30 kWh. Thanks to the modular design, expansion is fast and does not require specialist tools.

Build an efficient solar power system – up to 5.6 kW from panels

The DELTA Pro Ultra inverter features two PV inputs: a low-voltage input up to 150 V and a high-voltage input up to 450 V, allowing you to connect up to ten 400 W solar panels. This enables you to achieve an impressive total solar input of up to 5,600 W (4,000 W + 1,600 W). Power your devices with free solar energy and cut electricity costs. DELTA Pro Ultra is the world’s first power station to support a 450 V high-voltage PV input.

Multiple charging methods – easy access to energy

The DELTA Pro Ultra system offers exceptional flexibility when it comes to charging. You can choose from several methods depending on current conditions: solar panels (up to 4,000 W or up to 1,600 W), EV charging stations (up to 6,900 W), fuel generators (up to 2,800 W), or a standard wall outlet (up to 2,800 W). Dual charging is also supported (PV + grid), providing a maximum input power of up to 8,800 W. Charging times are equally impressive: a single battery can reach 80% charge in about 1 hour and 13 minutes, while two batteries can be fully charged in just 2 hours.

Easy integration with your home electrical system

When used with the separately sold MTS (Manual Transfer Switch), the DELTA Pro Ultra can power an entire home electrical installation. The switch allows seamless switching between the grid and the EcoFlow system. This makes it possible, for example, to use solar energy stored during the day to power your home in the evening and at night, helping to reduce electricity bills. The solution is also highly effective in emergency situations.

Reliable UPS emergency power

Unexpected outage? No problem. The DELTA Pro Ultra system (battery with inverter) supports an online UPS function that switches to backup power in under 20 ms. This ensures uninterrupted operation of critical devices such as refrigerators or computers during sudden power failures.

Full control with the EcoFlow app

The EcoFlow app provides convenient and comprehensive control over the power station. You can monitor energy consumption, battery charge levels, and system status in real time. The intuitive interface allows you to automate charging and discharging schedules, adjust operating modes, and optimize overall system performance. The app is also compatible with other platforms and smart-home ecosystems, including Google, Shelly, Tapo, and Kasa Smart.

Designed for all weather conditions

The EcoFlow DELTA Pro Ultra performs reliably even in demanding environments. It features an auto-heating function, allowing operation in temperatures from -20°C to 45°C. The X-Cooling system ensures effective thermal management, while the IP54 rating protects against dust and splashes. The high-quality LFP (Lithium Iron Phosphate) battery offers long service life, supported by a BMS (Battery Management System) and SOC cell-balancing technology.

Thoughtful design and surprisingly quiet operation

The EcoFlow DELTA Pro Ultra is suitable for almost any setting, from single-family homes and vacation cabins to mobile and travel use. Its modular design and an optional transport trolley (sold separately) make it easy to move and transport. It is also ideal for professional applications, such as offices, film sets, or event production. The system operates exceptionally quietly: at loads below 2,000 W, noise levels are effectively 0 dB, and even under heavier loads, noise does not exceed 30 dB—about the level of a whisper. This makes it perfectly suitable for nighttime use.

Reduce your electricity bills

The DELTA Pro Ultra system helps lower electricity costs in a practical way. The self-powered mode prioritizes energy from solar panels before drawing power from the grid. Charging and discharging schedules further help minimize grid consumption and maximize savings.

What’s included in the box

• Inverter

• Portable base

• Supporting feet ×4

• M6 × 20 screws ×4

• Side wheels ×4

• Assembly and disassembly tool

• EcoFlow Solar cable for the Low-PV port

• AC charging cable

• User manual and warranty card

Technical specifications

General

• Dimensions: 690 × 481 × 214 mm

• Gross weight: 41.7 kg

• Net weight: 32.1 kg

• Single battery capacity: 6 kWh (6,144 Wh)

• Maximum expandable capacity: 30 kWh (6,144 Wh ×5)

Inputs

• PV input (High-PV): 80–450 V, 15 A, max. 4,000 W

• PV input (Low-PV): 30–150 V, 15 A, max. 1,600 W

• AC input (charging/bypass): 200–240 V, 12.5 A, 50/60 Hz

• Input/output current: 200–240 V, 30 A, 50/60 Hz, max. 6,900 W

Outputs

• AC output (EU): 230 V, 50 Hz, total 6,900 W, max. 13 A per port ×4, max. 30 A on one port ×1

• Bypass mode: 220–240 V, 50/60 Hz, total 2,900 W, max. 12.5 A per port ×5

• DC output: 12.6 V, 30 A, max. 378 W

• USB-C ports: 5/9/12/15 V – 3 A, 20 V – 5 A, max. 100 W per port ×2, total 200 W

• USB-A ports: 5 V – 2.4 A, max. 12 W per port ×2, total 24 W

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: ≤3,000 m

• Noise level: ≤30 dB

Other

• UPS switching time: <20 ms

• Connectivity: Wi-Fi 2.4 GHz, Bluetooth 5.0

• Protection rating: IP54

• Display: LCD

• EMC: Class A

• Warranty: 5 years