Overview

This smart extra battery adds 6,144Wh to an EcoFlow DELTA Pro Ultra X or DELTA Pro Ultra inverter. It plugs in without setup, and you monitor and control it in the EcoFlow app.

DELTA Pro Ultra X is EcoFlow’s whole-home backup system. A standard setup pairs one inverter with two 6,144Wh batteries for 12kW and 12kWh. It scales to 36kW with three inverters and to 180kWh with up to 30 batteries.

The pack uses EV-grade full-tab LFP cells with dual battery management (a local BMS plus cloud monitoring). It heats itself in extreme cold for safe charging, and EcoFlow rates charging at up to 113°F.

Who it’s for

DELTA Pro Ultra X or DELTA Pro Ultra owners who want longer backup.
Homes building whole-home backup in stages.
Homes pairing large solar arrays with battery storage.

Key benefits

6,144Wh per battery: add capacity one battery at a time.
No tools: plug-in expansion up to 30 batteries (180kWh).
Cold-weather ready: self-heating for safe charging in extreme cold.
Monitored: local and cloud battery management with app alerts.

Specifications

Capacity	6,144Wh
Chemistry	LFP, EV-grade full-tab cells
Compatible with	DELTA Pro Ultra X and DELTA Pro Ultra inverters
System capacity	Up to 180kWh with 30 batteries (DELTA Pro Ultra X)
Battery management	Local BMS plus cloud monitoring
Cold weather	Self-heating
App	EcoFlow app
Weight	111.3 lb (manufacturer figure)

FAQ

Does it work with the original DELTA Pro Ultra?

Yes. EcoFlow lists it as compatible with both DELTA Pro Ultra and DELTA Pro Ultra X inverters.

Do I need tools to add it?

No. It’s a plug-in battery with no setup.

How many can I connect?

A DELTA Pro Ultra X system scales to 180kWh with up to 30 batteries.

Warranty

Manufacturer’s warranty: 5 years. Source: EcoFlow warranty policy.

Defective on arrival or within 30 days? You can also return it to us under our Returns & Refunds Policy. See how warranty claims work.

Solar Generators & Kits

EcoFlow DELTA Pro Ultra X 6kWh Batteries