EcoFlow  ·  Batteries

SKU: EFDELTAPROUXEB

EcoFlow DELTA Pro Ultra X Smart Extra Battery

Upgrade your EcoFlow DELTA Pro Ultra X system with this plug-and-play Smart Extra Battery, adding an additional 6,144Wh of capacity instantly—no tools or setup required.

Regular price
$2,299.00
Sale price
$2,299.00
Regular price
$3,299.00
You save $1,000.00
Pay over time at checkout.
Orders processed in 24–48 hours
30-day returns
Lifetime support by phone, chat & email
Full manufacturer warranty

Questions before you buy?

Call 877-242-2792 and we’ll work it out with you. Mon–Thu 10am–5:30pm, Fri 10am–1pm EST.

Trusted by 50,000+ Customers powered since 2018
Lifetime Support Phone, email or live chat, for good
Price Match Found it cheaper? Tell us
Ships from the USA Warehouses in CA, TX and NY

Frequently bought together

Specifications

The details.

Upgrade your EcoFlow DELTA Pro Ultra X system with this plug-and-play Smart Extra Battery, adding an additional 6,144Wh of capacity instantly—no tools or setup required. Designed with EV-grade LFP cells, dual BMS, and 3-level safety architecture, this battery offers unmatched reliability, efficiency, and long-term performance.

Whether you’re preparing for extended outages or scaling your energy independence, the Smart Extra Battery is the ideal solution for off-grid power, emergency backup, or whole-home systems.

Key Features & Benefits:

  • Expandable 6,144Wh Capacity – Instantly increase your DELTA Pro Ultra X storage.

  • Plug-and-Play Design – No tools, wiring, or setup required.

  • EV-Grade LFP Battery Cells – Long lifespan, high efficiency, and thermal stability.

  • Smart Monitoring – View usage and control settings in real-time via the EcoFlow App.

  • Advanced Safety – Dual BMS + 3-level protection for peace of mind.

  • Extreme Weather Protection – Reliable performance in tough conditions.

  • Scalable System – Supports up to 30 additional batteries for up to 180kWh total capacity.

  • 5-Year Warranty – Backed by EcoFlow’s full coverage and support.

Perfect for powering your entire home, RV, cabin, or off-grid system when paired with the DELTA Pro Ultra X inverter hub.

User Manual / Documents:

Battery Chemistry
LFP
Warranty
5 years
Battery Temperature
Operating & Storage temp: −4°F to 113°F (−20°C to 45°C)
Inverter Temperature
Operating & Storage temp: −4°F to 122°F (−20°C to 50°C)