DELTA Pro Ultra X Smart Extra Battery | EcoFlow US
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EcoFlow DELTA Pro Ultra X Smart Extra Battery EcoFlow DELTA Pro Ultra X Smart Extra Battery EcoFlow DELTA Pro Ultra X Smart Extra Battery EcoFlow DELTA Pro Ultra X Smart Extra Battery
USD $2,199.00
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EcoFlow DPUX ACC 1 x DELTA Pro Ultra X Smart Extra Battery EcoFlow DELTA Pro Ultra X Smart Extra Battery
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EcoFlow DELTA Pro Ultra X Smart Extra Battery EcoFlow DELTA Pro Ultra X Smart Extra Battery EcoFlow DELTA Pro Ultra X Smart Extra Battery EcoFlow DELTA Pro Ultra X Smart Extra Battery

  • Expandable capacity - Increase the capacity of DELTA Pro Ultra X with an extra 6144Wh.
  • Plug-and-play without setup. And use the EcoFlow app to monitor and control.
  • The Highest Safety Standards: EV-grade LFP cells, dual BMS, and 3-level safety architecture. 
  • 5-Year Full Warranty 
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7% OFF
11 - 20 pcs
9% OFF
20+ pcs
10% OFF
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Selection Summary
EcoFlow DPUX ACC 1 x DELTA Pro Ultra X Smart Extra Battery EcoFlow DELTA Pro Ultra X Smart Extra Battery
1 x DELTA Pro Ultra X Smart Extra Battery
USD $2,199 $3,299
USD $2,199 $3,299 -$1,100

Flexible installment payment options available. Learn More

This is a pre order item. We will ship it when it comes in stock.
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Comparison

DELTA Pro Ultra X

DELTA Pro Ultra

DELTA Pro 3

AC Output
12kW, 120/240V, 60HzUp to 36kW in 3 parallel units
Discharging: Pure sine, 7,200W total, 120V/240V~ 60HzBypass: 100-120V~30A total, 50Hz/60Hz
120/240V~16.7A 60Hz, 4000W total
12kW, 120/240V, 60HzUp to 36kW in 3 parallel units
Discharging: Pure sine, 7,200W total, 120V/240V~ 60HzBypass: 100-120V~30A total, 50Hz/60Hz
120/240V~16.7A 60Hz, 4000W total
Battery Capacity
12kWh
102.4V⎓60A, 6,144Wh
4kWh
12kWh
102.4V⎓60A, 6,144Wh
4kWh
Max AC Output Voltage / Current
240v/50A
240v/30A
120v/20A
240v/50A
240v/30A
120v/20A
AC/Solar Charging Input
AC Charging Input:100-120V 50/60Hz 1800W 15A120/240V 50/60Hz 7200W 30A120/240V 50/60Hz 12000W 50ABypass Mode: 100-120V 50/60Hz 1800W 15A120/240V 50/60Hz 7200W 30A120/240V 50/60Hz 12000W 50ASolar Charging Input:80-500V, 15A RMS*2
AC Input"Charging: 100-120V~15A; 200-240V~12.5A, 50/60HzBypass: 100-120V~15A, 50/60Hz (duration < 3hrs when the current exceeds 12A)"Solar Charging Input"Total 5600W, 2 portsHigh-PV Input: 80-450V/15A, 4000W MaxLow-PV Input: 30-150V/15A, 1600W Max"
AC Charging InputCharge Only: 100-240V~15A 50/60HzBypass Mode: 100-120V~15A (3 hours Max), 12A (continue), 50/60HzSolar Charging Input2600W total, 2 portsHigh-PV Input: 30V-150V⎓, 15A, 1600W MaxLow-PV Input: 11V-60V⎓, 20A, 1000W Max
AC Charging Input:100-120V 50/60Hz 1800W 15A120/240V 50/60Hz 7200W 30A120/240V 50/60Hz 12000W 50ABypass Mode: 100-120V 50/60Hz 1800W 15A120/240V 50/60Hz 7200W 30A120/240V 50/60Hz 12000W 50ASolar Charging Input:80-500V, 15A RMS*2
AC Input"Charging: 100-120V~15A; 200-240V~12.5A, 50/60HzBypass: 100-120V~15A, 50/60Hz (duration < 3hrs when the current exceeds 12A)"Solar Charging Input"Total 5600W, 2 portsHigh-PV Input: 80-450V/15A, 4000W MaxLow-PV Input: 30-150V/15A, 1600W Max"
AC Charging InputCharge Only: 100-240V~15A 50/60HzBypass Mode: 100-120V~15A (3 hours Max), 12A (continue), 50/60HzSolar Charging Input2600W total, 2 portsHigh-PV Input: 30V-150V⎓, 15A, 1600W MaxLow-PV Input: 11V-60V⎓, 20A, 1000W Max
Number of AC Outlets
NEMA 5-20 (x2) 120V 20A NEMA L14-30 (x1) 120/240V 30A NEMA 14-50 (x1) 120/240V 50A
120V AC Output Socket (Backup UPS): 2 x 20A Max per port120V AC Output Socket (Online UPS): 2 x 20A Max per port120V AC Output Socket (Online UPS): 1 x 30A Max120V/240V AC Output Socket (Backup UPS): 1 x 30A Max
Total: 74 x NEMA 5-20R, 120V/20A1 x TT-30, 120V/30A1 x L14-30, 120V/240V/16.7A1 x NEMA 6-20R, 240V/16.7A
NEMA 5-20 (x2) 120V 20A NEMA L14-30 (x1) 120/240V 30A NEMA 14-50 (x1) 120/240V 50A
120V AC Output Socket (Backup UPS): 2 x 20A Max per port120V AC Output Socket (Online UPS): 2 x 20A Max per port120V AC Output Socket (Online UPS): 1 x 30A Max120V/240V AC Output Socket (Backup UPS): 1 x 30A Max
Total: 74 x NEMA 5-20R, 120V/20A1 x TT-30, 120V/30A1 x L14-30, 120V/240V/16.7A1 x NEMA 6-20R, 240V/16.7A
UPS
<10ms standalone, <20ms with Smart Home Panel 3
Backup UPS <20 ms; Online UPS 0 ms
10ms
<10ms standalone, <20ms with Smart Home Panel 3
Backup UPS <20 ms; Online UPS 0 ms
10ms
Max. Scalability
Up to 180kWh, 36kW
Up to 90kWh, 21.6kW
Up to 36kWh, 12kW
Up to 180kWh, 36kW
Up to 90kWh, 21.6kW
Up to 36kWh, 12kW
Auto Home Backup Switch
YES Auto switchover <20ms when paired with EcoFlow Smart Home Panel 3
YES Auto switchover <20ms when paired with EcoFlow Smart Home Panel 2
YES Auto switchover <20ms when paired with EcoFlow Smart Home Panel 2
YES Auto switchover <20ms when paired with EcoFlow Smart Home Panel 3
YES Auto switchover <20ms when paired with EcoFlow Smart Home Panel 2
YES Auto switchover <20ms when paired with EcoFlow Smart Home Panel 2
Feature Availability
Customized WidgetDashboardThird-party Devices IntegrationFuture Electricity Price AnalysisSelf-PoweredTOU ModeScheduled TasksAPIAI Assistant
Customized WidgetDashboardThird-party Devices IntegrationFuture Electricity Price AnalysisGenerator Auto Start/StopSelf-PoweredTOU ModeScheduled TasksAPI
DashboardThird-party Devices IntegrationGenerator Auto Start/StopScheduled TasksAPI
Customized WidgetDashboardThird-party Devices IntegrationFuture Electricity Price AnalysisSelf-PoweredTOU ModeScheduled TasksAPIAI Assistant
Customized WidgetDashboardThird-party Devices IntegrationFuture Electricity Price AnalysisGenerator Auto Start/StopSelf-PoweredTOU ModeScheduled TasksAPI
DashboardThird-party Devices IntegrationGenerator Auto Start/StopScheduled TasksAPI
Net Weight
Inverter: 34.5±0.2kg（70.06±0.44 lb）Battery: 50.5±0.2kg（111.3±0.44 lb）
Inverter: 31.7 kg (70 lb) Battery: 50.7 kg (111.8 lb)
Approx. 51.5 kg
Inverter: 34.5±0.2kg（70.06±0.44 lb）Battery: 50.5±0.2kg（111.3±0.44 lb）
Inverter: 31.7 kg (70 lb) Battery: 50.7 kg (111.8 lb)
Approx. 51.5 kg

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
12–180kWh Capacity—Power That Lasts
Plug your generator into DELTA Pro Ultra X for seamless backup²
Plug your generator into DELTA Pro Ultra X for seamless backup²
10kW Solar Surge³
10kW Solar Surge³

12–180kWh Capacity—Power That Lasts

Plug your generator into DELTA Pro Ultra X for seamless backup²

10kW Solar Surge³

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.

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

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.

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.

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.

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).

EV-grade full-tab cells
EV-grade full-tab cells
Durable battery pack
Durable battery pack
Dual BMS Protection
Dual BMS Protection
3-Level System Safety Architecture
3-Level System Safety Architecture
Smart Extreme-Weather Protection
Smart Extreme-Weather Protection

EV-grade full-tab cells

Durable battery pack

Dual BMS Protection

3-Level System Safety Architecture

Smart Extreme-Weather Protection

What's in the box?

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