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Ecoflow DELTA Pro Ultra X 6kWh Battery
by EcoFlow

Ecoflow DELTA Pro Ultra X 6kWh Battery

SKU: EFDELTAPROUXEB
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$2,528.99
$2,528.99 - $2,528.99
$2,528.99
$2,199.00
$2,199.00 - $2,199.00
$2,199.00
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Product Highlights
  • 100% Whole-Home Power Station: Delivers 12–36kW output and 12–180kWh capacity.
  • Plug&Play design, installed in 7 Days. Save up to 80% on Time and Cost
  • Smart & Reliable When It Matters Most, 20ms Auto switchover
  • Save up to $6,000/year, 3-Year ROI
  • End-to-End System Protection, Industry’s Highest Safety Certification
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Ecoflow DELTA Pro Ultra X 6kWh Battery

Ecoflow DELTA Pro Ultra X 6kWh Battery

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.

Get Through Any Outage

Start with 12kWh. Scale instantly to 180kWh

with up to 30 plug-in expansion batteries—no tools, no hassle. Power grows with your needs.

Plug your generator into DELTA Pro Ultra X for seamless backup.

With the EcoFlow FlowMaster Generator Rectifier, you can charge while delivering up to 12kW output—no downtime, no compromise. Compatible with all major portable generators.

Take in 10kW solar input—enough to recharge 12kWh to 80% in just around 1 hour.

Even during storm season, enjoy a full daily recharge and steady, unshakeable energy.

 

The Fastest Installation:

7 Days, 3 Steps

DAY 1-2: Installer Match

After your installation order is placed, we’ll match you with an EcoFlow Authorized Installer.

DAY 3-6: Site Visit

An Authorized Installer will schedule a visit to your home to assess your setup and plan installation.

DAY 7: One-Day Installation

Your Smart Home Panel 3 is wired, your EcoFlow app is synced, and your system is fully live. We provide end-to-end support—so your home is powered, connected, and protected from day one.

 

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

Before the Storm: Get Alerts

Storm Guard Mode sends real-time alerts through the app and can automatically charge your DELTA Pro Ultra X to 100% using solar or grid power.

When the Storm Hits: Lights Stay On

EcoFlow DELTA Pro Ultra X, paired with the Smart Home Panel 3 or Smart Gateway, switches your whole home from grid to battery power in under 20ms—faster than a blink. The lights stay on, Wi-Fi stays up, and even the game console keeps running. Zero delays. Zero disruptions.

During the Storm: Extended Backup Time

With Smart Home Panel 3, tag appliances by priority in the app. Essentials stay powered while non-essentials are throttled—extending backup time by up to 42%. EcoFlow AI Assistant fine-tunes power use in real time, adapting to weather, usage, and solar input.

 

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

The first EV-grade full-tab cells deliver higher capacity with lower resistance, less heat, and longer-lasting performance. 25% More Efficient power flow (thanks to lower resistance: 1.5 mΩ vs. 2 mΩ) 25% Less Self-Heating

EV-grade full-tab cells

Perfectly matched cells ensure identical capacity, voltage, and resistance, minimizing wear and maximizing battery life. 24/7 Self-Maintenance: Automatic SOC balancing maximizes efficiency across the battery’s entire lifespan.

Durable battery pack

Local BMS – X-Guard® System: 44+ safeguards and comprehensive monitoring ensures all-around safety. Safeguards: overcharge/discharge, extreme temperatures, short circuits, component failures, and more Cloud BMS – Big Data Protection: 100+ anomaly detectors run 24/7, with instant alerts, local service response, and remote emergency support.

Dual BMS Protection

Power Protection: 1.2M circuit samples/sec, millisecond-level anomaly detection for inverter and battery. Connection Monitoring: Intelligent cable and interface safeguards track heat, recognize faults, and allow instant shutdown for total electrical security. Load Isolation: Continuous voltage/current monitoring with triple-layer isolation. Faulty devices are cut off automatically while critical loads stay powered.

3-Level System Safety Architecture

Heats batteries in extreme cold for safe charging and longer runtime, while high-temp protection allows charging even at up to 45°C (113°F).

Smart Extreme-Weather Protection

Specifications:

Ecoflow DELTA Pro Ultra X 6kWh Battery
General Information
Net weight Approx. 111.3 lb
Dimensions Approx. 26 in × 18 in × 8 in
Battery
Capacity 102.4V⎓60A 6,144Wh
Cell Material LFP(LiFePO4)
Protection Type Overvoltage protection
Overload protection
Overtemperature protection
Short circuit protection
Low temperature protection
Low voltage protection
Overcurrent protection
Operating Environment
Operating Temperature -4°F to 113°F
Storage Temperature -4°F to 113°F
Operating Humidity <90%
Altitude <3000m

PACKAGE INCLUDES

Ecoflow DELTA Pro Ultra X 6kWh Battery

Ecoflow DELTA Pro Ultra X 6kWh Battery

x 1

EcFlow Battery Connection Cable

x 1

User Manual

x 1

EcoFlow Warranty Card

x 1

Frequently Asked Questions

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.

Product Documents:

Ecoflow DELTA Pro Ultra X User Manual

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