EcoFlow 6144Wh Smart Extra Battery for DELTA Pro Ultra and Ultra X Inverter

Increase the capacity of DELTA Pro Ultra and Ultra X with an extra 6144Wh.

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

EV-grade full-tab cells
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 m Ohm vs. 2 m Ohm) 25% Less Self-Heating.

Durable battery pack
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.

Dual BMS Protection
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.

3-Level System Safety Architecture
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.

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