• Front view of the EcoFlow Delta Pro Ultra Smart Extra Battery.
  • Angled front-left view of the EcoFlow Delta Pro Ultra Smart Extra Battery.
  • Angled front-right view of the EcoFlow Delta Pro Ultra Smart Extra Battery.
  • EcoFlow Delta Pro Ultra Smart Extra Battery shown stacked in a home backup power setup.
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EcoFlow

EcoFlow Delta Pro Ultra Extra Battery

EcoFlow Delta Pro Ultra Extra Battery

$3,799.00 CAD
$4,099.00 CAD $3,799.00 CAD
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The EcoFlow DELTA Pro Ultra Smart Extra Battery expands your DELTA Pro Ultra system with an additional 6 kWh of long-lasting LFP storage. Designed for whole-home backup, off-grid living, and large solar installations, each battery adds up to two days of backup power, with system expansion up to 90 kWh for multi-week coverage.

With a plug-and-play stackable design, installation takes less than a minute—no wiring, no tools, and no wall mounting required. Its compact footprint and vertical stacking make it ideal for homes, cabins, garages, and utility spaces where reliability and organization matter.

Built with IP54 protection, ultra-durable LiFePO₄ cells (3500+ cycles), and wide operating temperatures with self-heating for winter performance, the DELTA Pro Ultra Smart Extra Battery delivers scalable, dependable energy storage for any whole-home or off-grid application.

Features

Adds 6 kWh of expandable LFP storage to the DELTA Pro Ultra system

Scalable from 6 kWh to 90 kWh for multi-day or multi-week home backup

Ideal for home backup, solar storage, and off-grid power systems

Plug-and-play installation — no tools, wiring, or wall mounting

Vertical stacking design keeps systems neat and space-efficient

UL-certified LFP battery with 3500+ cycles to 80% capacity

IP54 protection for indoor utility rooms, garages, and off-grid setups

Built-in self-heating enables charging and operation in cold climates

Compatible with all DELTA Pro Ultra inverters and Smart Home Panel 2 systems

Backed by EcoFlow’s 5-year warranty

Detailed Specifications

Battery Specifications
  • Battery Chemistry: LFP (LiFePO₄)
  • Capacity: 6144 Wh (6.144 kWh)
  • Nominal Voltage / Current: 102.4 V ⎓ 60 A
  • Cycle Life: 80% capacity after 3500+ cycles
  • Expandable Capacity (Single Inverter): up to 30 kWh (5 batteries)
  • Expandable Capacity (System*): up to 90 kWh (15 batteries)
  • IP Rating: IP54
  • Warranty: 5 years
Environmental
  • Discharge Temperature: -20 to 45 °C (-4 to 113 °F)
  • Charge Temperature: -20 to 45 °C (-4 to 113 °F)
  • Storage Temperature: -20 to 45 °C (-4 to 113 °F)
  • Cold-Climate Support: Battery self-heating when below 0 °C
Dimensions & Weight
  • Dimensions (L × W × H): 66.0 × 45.5 × 20.4 cm (26 × 18 × 8 in)
  • Net Weight: 50.7 kg (111.8 lb)
System Notes
  • *System capacity up to 90 kWh when paired with 3 DELTA Pro Ultra inverters and 15 batteries.

What's Included

1 x EcoFlow Delta Pro Ultra Battery
1 x EcoFlow Battery Connection Cable
1 x Safety Guide

Warranty

5 Year Warranty

Carbon-neutral shipping on all orders
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About EcoFlow DELTA Pro Ultra

The Most Powerful Whole-Home Backup Solution

Month-Long Power Security.

6-90kWh Capacity

Take home power dependability to another level with up to 90kWh battery capacity. For a standard household, that's over 30 days of essential backup power to keep appliances like lights and refrigerators running strong (time may vary). Stackable and space-saving, it packs comfortably into a garage or utility closet.

One Hour Of Solar For One Day Of Power.

By Leveraging High And Low-PV Technologies, A Single Inverter Sets New Portable Solar Input Standards With A 5.6kW Input*. Connect Three Inverters For A Monumental 16.8kW, Gaining A Full Day's Home Energy In 60 Minutes. Whether You Prefer A Portable Setup Or A Rooftop Solar System, You Can Achieve True Energy Independence.

Flexible Solar Systems

By leveraging High and Low-PV technologies, a single inverter sets new portable solar input standards with a 5.6kW input*. Connect three inverters for a monumental 16.8kW, gaining a full day's home energy in 60 minutes. Whether you prefer a portable setup or a rooftop solar system, you can achieve true energy independence.

Rigid Solar System

With Its Flexible Plug-And-Play Design And Unrivaled Solar Input, EcoFlow DELTA Pro Ultra Empowers You To Tailor Your Solution To Fit Your Energy Needs. EcoFlow DELTA Pro Ultra Includes A PV Locking Feature, Assuring Safety And A Solid Energy Connection.

Always In Charge

With a Generator or EV pile

You're spoilt for choice with EcoFlow DELTA Pro Ultra's charging options. As well as all our usual methods, like solar and the grid, you can now power up using a gas generator or even your EV charging pile. With the industry's fastest charging speeds of 8800W, top up two batteries in only 2 hours.

You Won't Even Notice The Grid Was Down.

0 Ms Downtime, 0 DB Silent Backup

Imagine a world where power outages go unnoticed. With EcoFlow DELTA Pro Ultra's online UPS, you'll get just that. With uninterrupted power flow, EcoFlow DELTA Pro Ultra safeguards your vulnerable electronic equipment round-the-clock. For extended outages, you don't want to hear your backup in the background, so for low draws under 2000W*, it's completely silent. With a whisper-quiet 0 dB, your nights remain undisturbed as it powers your devices.*For a maximum of 30 minutes.

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Powers through the most challenging situations.

EcoFlow DELTA Pro Ultra tackles even the most grueling conditions. Whether it's extreme weather or freezing winters, this giant safeguards your power security, just like usual.

What's in the box?