EcoFlow DELTA Pro Ultra Specifications – EcoFlow DELTA Pro Ultra is a residential power backup system for extended outages and daily use. A single unit can run your entire home with an unrivaled capacity of 6kWh, 7.2kW output, and 5.6kW solar input. With EcoFlow Smart Home Panel 2, get an uninterrupted power backup experience with automatic switchover, energy consumption monitoring, and lower electricity bills.
With its stackable design, EcoFlow DELTA Pro Ultra storage and output can be expanded in only minutes. Compatible with various energy sources,
from solar to gas, to meet your ever-changing power needs. The DELTA Pro Ultra can either be used as a stand-alone unit using various recharging options (low/high voltage solar systems, generators, EV chargers, etc.) or forms a whole home backup system to ensure that your home can be powered 24/7 without any influence from power outage.
EcoFlow DELTA Pro Ultra Specifications
EcoFlow DELTA Pro Ultra Inverter
| General Information | |
|---|---|
| Product Name | Power Station Inverter |
| Model | EFYJ751-PCS-US |
| Net Weight | E31.7 kg / 70 lb |
| Dimensions (W × D × H) | E690 × 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, 7,200W total, 120/240V~ 60 Hz; (Bypass) 100-120V~30A max, 50/60 Hz |
| USB Port | USB-A: 5V 2.4A, 12W max per port, total 24W USB-C: 5/9/12/15/20V 5A, 100W max per port, total 200W |
| DC Output | 12.6V 30A, 378W max |
| Input | |
| AC Input | (Charging only) 100-120V~15A; 200-240V~12.5A, 50/60 Hz; (Bypass) 100-120V~ 15A, 50/60 Hz (duration < 3hrs when the current exceeds 12A) |
| Power Input/Output Port | 100-120V~30A, 200-240V~30A, 50/60 Hz |
| High Voltage PV Input | 80-450V 15A max, 4,000W max |
| Low Voltage PV Input | 30-150V 15A max, 1,600W max |
| Environment | |
| Discharging Temperature | −20°C-45°C (−4°F-113°F) |
| Charging Temperature | −20°C-45°C (−4°F-113°F) |
| Storage Temperature | −20°C-45°C (−4°F-113°F) (optimum at 20°C-30°C/68°F-86°F) |
| Altitude | ≤3,000 m (≈9,842 ft) |
| Communications | |
| Method | CAN & Bluetooth & Wi-Fi & Ethernet & 4G |
| Wi-Fi | Frequency range: 2,412-2,462 MHz/2,422-2,452 MHz Maximum output power: 0.3597W |
| Bluetooth | Frequency range: 2,402-2,480 MHz Maximum output power: 0.0109W |
| Compatibility | EcoFlow DELTA Pro Ultra Battery EcoFlow 50 Amp Hub EcoFlow Smart Home Panel 1 |
EcoFlow DELTA Pro Ultra Battery
| Model | |
| Product Name | Rechargeable Li-ion battery pack |
| Model | EFYJ751-BP |
| Weight | 50.7 kg (111.8 lbs) |
| Dimensions | 660 × 455 × 204 mm (26 × 18 × 8 in.) |
| IP Rating | IP54 |
| Battery | |
| 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 |
| Environment | |
| Discharging Temperature | −20°C-45°C (−4°F-113°F) |
| Charging Temperature | −20°C-45°C (−4°F-113°F) |
| Storage Temperature | −20°C-45°C (−4°F-113°F) (optimum at 20°C-30°C/68°F-86°F) |
| Altitude | ≤3,000 m (≈9,842 ft) |
EcoFlow DELTA Pro Ultra Specifications Overview
Home Backup
The DELTA Pro Ultra can either be used as a stand-alone unit using various recharging options (low/high voltage solar systems, generators, EV chargers, etc.) or forms a whole home backup system to ensure that your home can be powered 24/7 without any influence from the power outage.
Continuous Power
With EcoFlow DELTA Pro Ultra’s UPS technology, you’ll get impeccable, uninterrupted power flow, EcoFlow DELTA Pro Ultra safeguards your vulnerable electronic equipment round-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. With a whisper-quiet 0 dB, your nights remain undisturbed as it powers your devices.
Expandable Capacity
The rated capacity of one battery is 6kWh. To expand capacity for powering your appliances (see Overview or Power Your Appliances) or backing up your whole home (see Backup System), one can connect up to 5 batteries to an inverter or up to 15 batteries to 3 sets of inverters, which makes the total capacity add up to about 30kWh to 90kWh.
How It Works
Supported Appliances
1. Appliance Compatibility
Refer to the information above to ensure that your appliances are compatible with DELTA Pro Ultra. If you choose to proceed with incompatible appliances, DELTA Pro Ultra may not be able to provide backup power effectively. To avoid this, please check the following specifications carefully.
2. Compressor-based Appliances
For any compressor-based appliance, please ensure that the RLA (Rated Load Amps) and LRA (Locked Rotor Amps) of your appliances are compatible with the corresponding specs of the inverter. Compressor-based appliances include air conditioners, heat pumps, fridges, etc.
| Max combined appliance rating per DELTA Pro Ultra | ≤120A LRA or ≤20A RLA per DELTA Pro Ultra |
3. Resistive-based Appliances
Resistive-based appliances include tank water heaters, tankless water heaters, etc.
| Maximum combined rating | Compatibility |
|---|---|
| 7.2kW, 10.8kW peak | 1 set of DELTA Pro Ultra |
| 14.4kW, 21.6kW peak | 2 sets of DELTA Pro Ultra |
Backup System
The DELTA Pro Ultra can be used to create a whole home backup system that stores power for your appliances using several schemes. You can check daily/monthly/yearly figures or configure settings via the EcoFlow app. You will enjoy an outage-free life after installing this whole home backup system, which is specifically suitable for emergency backup during hurricane seasons, power outages, peak power demand, and so on.
Connection Schemes
EcoFlow Smart Home Panel 2
EcoFlow Smart Home Panel 2 connects up to 3 sets of DELTA Pro Ultra (1 inverter supports up to 5 batteries) serves as an auxiliary distribution point for electricity from the main panel and provides extra breakers for your backup loads
- A. DELTA Pro Ultra (×3 sets max)
- B. EcoFlow Smart Home Panel 2 (sub-panel)
- C. Main Panel
- D. Meter
Transfer Switch
Scheme 1
The EcoFlow 50 amp hub links up to two sets of DELTA Pro Ultra and acts as a power transfer center between DELTA Pro Ultra and the 50 amp transfer switch.
- A. EcoFlow DELTA Pro Ultra (×2 sets max)
- C. Main Panel
- D. Meter
- E. 50 Amp Transfer Switch
- F. EcoFlow 50 Amp Hub
Scheme 2
- A. EcoFlow DELTA Pro Ultra (×1 set)
- C. Main Panel
- D. Meter
- E. 30 Amp Transfer Switch
For any transfer switch that does not include an inlet box function, please connect an inlet box to DELTA Pro Ultra and the transfer switch.
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