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EcoFlow DELTA Pro Ultra X
Whole-Home Power. Unbound.
12–36kW Output
High Power. High IQ.
DELTA Pro Ultra X scales from 12 to 36kW. With a new Adaptive Start algorithm, it intelligently identifies connected appliances and tailors startup for each, seamlessly handling surges up to 45kW and high-demand appliances like a 5-ton AC.
Installed in 7 Days
The wide-body inverter and battery are a stand-alone, off-grid unit—no wall mounting required.Its flexible design allows for faster, simpler approval than grid-tied systems.The exclusive quick-connect makes plug-and-play with the Smart Home Panel 3 or Smart Gateway effortless.
Get Through Any Outage
The Fastest Installation:
7 Days, 3 Steps
Energy That Can Move With You
DIY Solar + Plug-and-Play Batteries
Smart & Reliable When It Matters Most
Auto-Recharging · 20ms Auto Switchover · 32 Circuits · Intelligent Control
Your 24/7 Money Saver
Here's a Typical Day of Savings
Day and night, the system intelligently shifts between solar, storage, and off-peak rates—maximizing every watt to get you the best deal. Here's what that might look like on a typical day of use.
Compatible with Existing Rooftop Solar
No Wasted Watts
With the EcoFlow Current Sense Transformer, every extra watt is redirected to your DELTA Pro Ultra X Smart Extra battery—never wasted or sold back to the grid for pennies.
The Highest Safety
Standards
What's in the box?
Specs
Standard Capacity
12.288kWh, 6144Wh x 2
Maximum Capacity with 1 inverter
61.440kWh, 6144Wh x 10
AC Output
12kW, 120/240V, 60Hz
Up to 36kW in 3 parallel units
Maximum Capacity with 3 inverters
184.32kWh, 6144Wh x 30
Net Weight (lb)
Inverter: 34.5±0.2kg（70.06±0.44 lb）
Battery: 50.5±0.2kg（111.3±0.44 lb）
Dimension (mm)
Inverter: 675 × 475 × 230 mm (26.6 × 18.7 × 9.06 in.)
Battery：660 × 455 × 204 mm (26 × 18 × 8 in.)
Battery Chemistry
LFP
Warranty
5 years
Screen
✓
Extra Battery
✓
AC Outlets
NEMA 5-20 (x2) 120V 20A
NEMA L14-30 (x1) 120/240V 30A
NEMA 14-50 (x1) 120/240V 50A
UPS
<10ms standalone, <20ms with Smart Home Panel 3
Rated AC Input Power
12kW,100/200-120/240V, 50A
DC Input
Total 10kW, 2 ports
80-500V/15A, 5000W Max Each
Noise Level
Noise level <30 dB at 0.5 m (ambient temperature 25 °C, 4 kW output)
IP Rating
IP54
Battery Temperature
Operating&Storage temp: −4°F to 113°F (−20°C to 45°C)
Inverter Temperature
Operating&Storage temp: −4°F to 122°F (−20°C to 50°C)
FAQs
What are the specifications of the AC output ports of the DELTA Pro Ultra X?
The AC output ports and specifications of the DELTA Pro Ultra X are as follows:Front: NEMA 5 - 20 interface (120V 20A), L14 - 30 interface (120V/240V 30A), 14 - 50 interface (120V/240V 50A).Right side: 5 + 8 input/output interface (120V/240V 50A)
What are the specifications of the DC input ports of the DELTA Pro Ultra X? Are there any DC output ports?
The DC input ports and specifications of
DELTA Pro Ultra X are as follows:High-PV input port: 80-500V//15A per interface, with a total maximum input of 10000W.There is no DC output port.
How many battery packs can the DELTA Pro Ultra X connect to at most?
The DELTA Pro Ultra X supports the parallel connection of up to 10 battery packs (with a single battery pack capacity of 6144kWh), which can significantly increase the backup power capacity.
What is the UPS switching time of the DELTA Pro Ultra X?
The UPS switching time of the
DELTA Pro Ultra X is divided into two scenarios:When the DELTA Pro Ultra X operates independently: Power outage time < 10ms;When the DELTA Pro Ultra X operates in combination with the EcoFlow Smart Home Panel 3 (32 Circuits) or the Smart Gateway, the power outage switching time < 20ms.
What should be noted when connecting old batteries (DELTA Pro Ultra series) to the DELTA Pro Ultra X?
When connecting old batteries (with SN starting with Y712) to the DELTA Pro Ultra X, the following points must be followed:Only connect the old batteries to the rightmost Battery Port (the one farthest from the Power In/Out Port) for upgrading. Do not connect any batteries to the middle Battery Port to avoid abnormalities.Do not unplug the parallel connection cable during the upgrade process until the upgrade indicator on the screen disappears and the device restarts.
Which ecological products is the DELTA Pro Ultra X compatible with?
DELTA Pro Ultra X is compatible with the following products (some require additional accessories):Third-party devices: 3 - 7.2kW/12kW generators, charging piles, EV charging guns;EcoFlow products: EcoFlow Smart Home Panel 3 (32 Circuits) or Smart Gateway intelligent distribution box.
What are the core upgrades of the DELTA Pro Ultra X compared to the previous generation of DELTA Pro Ultra?
The total output power is increased from 7200W to 12000W;The maximum number of connectable battery packs is increased from 5 to 10;The maximum total PV input power is increased from 5600W to 10000W.
How about the solar charging capacity of the DELTA Pro Ultra X?
Supports two-way high-voltage PV inputs, with a voltage range of 80 - 500V for each way, a maximum working current of 15A per way, and a total power of up to 10,000W;The photovoltaic interface needs to be connected to the EcoFlow PV Switch Box (standard configuration).
Does the DELTA Pro Ultra X require a specific way to connect the battery packs to achieve an output power of 12KW?
Batteries need to be connected to both power-on pack ports on the Inverter. Additionally, it is recommended that the number of battery packs connected to the two ports be the same; if the number of battery packs connected to the two ports is inconsistent, the output power may not reach 12KW.
Can the DELTA Pro Ultra X output power in bypass mode when powered through the standard AC charging cable?
Yes, it's possible. The specification of the standard charging cable (EcoFlow AC Charging Cable (NEMA 5 - 15P to 5P8 Port)) is 15A, 120V. When charging with this cable, you can simultaneously output and carry a load from the front panel.
Can the DELTA Pro Ultra X change the power frequency to switch between 50Hz and 60Hz?
The frequency cannot be adjusted, and the default frequency is 60HZ. In bypass mode, the output frequency of the device is determined by the frequency of the input mains power (for example, if the mains power input is 60Hz, the output will be 60Hz; if the input is 50Hz, the output will be 50Hz).
Does the DELTA Pro Ultra X support charging by third-party generators?
Supported. There are two connection methods. You can directly connect to the Power in/out port via the accessory EcoFlow Generator Charging Adapter, or connect to the PV port through the EcoFlow FlowMaster Generator Rectifier [optional].
How to reset the Bluetooth connection of the DELTA Pro Ultra X?
When the device is turned off, press and hold the power button until the screen lights up, and then continue to hold it for about 5 seconds. When you hear the device beep twice in succession or see the device screen go off and then light up again, it indicates that the reset is successful.
Does the DELTA Pro Ultra X support grid connection?
It is not supported. The DELTA Pro Ultra X only draws power from the grid and will not actively transmit power back to the grid.
1. The 32 Smart Circuits feature is only available when DELTA Pro Ultra X is paired with the EcoFlow Smart Home Panel 3. This feature is not supported by DELTA Pro Ultra X alone. The EcoFlow Smart Home Panel 3 is sold separately and is not included with this product.
2. The conclusion is based on internal testing. Actual performance may vary during real-world use.
3. Charging performance of reaching 80% in approximately 1 hour was measured under controlled conditions (ambient and cell temperature of 25 °C, with stable PV or AC charging power). Actual charging time may vary due to temperature, charging power fluctuations, or other environmental factors.
4. Installation time and cost savings are based on internal testing compared with conventional home standby generators and traditional residential energy storage systems. Actual results may vary depending on installer, site conditions, and especially local permit approval times.