EcoFlow EFDELTAPROUXEB DELTA Pro Ultra X Smart Extra 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

12–180kWh Capacity—Power That Lasts

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 backup²

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.

10kW Solar Surge³

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.

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

Durable battery pack

Dual BMS Protection

3-Level System Safety Architecture

Smart Extreme-Weather Protection