EcoFlow DELTA Pro 3 Extra Battery – 4096Wh Expansion Battery
4,096Wh EcoFlow expansion capacity for compatible DELTA Pro 3 systems.
- 4,096Wh expansion battery — Adds storage to a compatible DELTA Pro 3 system
- Requires DELTA Pro 3 — Does not operate as a standalone power station
- Longer backup planning — Usable capacity depends on the connected EcoFlow system
- LFP battery chemistry — Rated to 4,000 cycles to 80% capacity
- Cable included — Connects with the EcoFlow extra battery cable
Expansion battery only. Requires compatible EcoFlow equipment and does not operate independently.
Out of stock
Is this expansion battery right for you?
Good fit if:
- Extend runtime on a compatible EcoFlow DELTA Pro 3 setup
- Add more stored energy without buying a second full power station
- Plan for longer outages or off-grid stays
- Build your EcoFlow backup system gradually
- You already have the correct compatible base unit and cables
Not ideal if:
- You need a standalone power station with AC sockets
- You do not own a compatible EcoFlow system
- You want a plug-and-play single-unit solution
- You need a lighter travel battery
- You have not checked compatibility before buying
DELTA Pro 3 Extra Battery at a Glance
A Closer Look at the DELTA Pro 3 Extra Battery
The DELTA Pro 3 Extra Battery is for extending a compatible EcoFlow DELTA Pro 3 setup. It is not designed to replace the main power station, but to add more stored energy so the overall system can run selected loads for longer.
Check compatibility, cables and setup requirements before purchase, especially if you are expanding an existing backup system.
Why it works for your setup
4,096Wh expansion battery
Adds storage to a compatible DELTA Pro 3 system
Requires DELTA Pro 3
Does not operate as a standalone power station
Longer backup planning
Usable capacity depends on the connected EcoFlow system
LFP battery chemistry
Rated to 4,000 cycles to 80% capacity
Cable included
Connects with the EcoFlow extra battery cable
Why Buy From VoltReady™
UK-Based Business
VoltReady is a UK-based portable-power specialist serving customers across the United Kingdom.
Manufacturer Warranty
Products include manufacturer-backed warranty cover, with the exact terms shown clearly on each product page.
Flexible Ways to Pay
Pay securely by card, Apple Pay, Google Pay, Klarna or Clearpay. Available options depend on your order and eligibility.
UK Customer Support
Get straightforward help before and after your purchase through live chat or email.
Everything important, clearly organised
Key Features
Technical Specifications
What’s in the Box
FAQs
Is this a standalone power station?
No. It is an expansion battery and requires a compatible EcoFlow DELTA Pro 3 system for AC output.
Which product is it compatible with?
EcoFlow lists this smart extra battery as compatible with the EcoFlow DELTA Pro 3.
How much capacity does it add?
It adds 4,096Wh of LFP battery storage to a compatible DELTA Pro 3 setup.
Is the connection cable included?
Yes. EcoFlow lists an extra battery cable in the box.
How many extra batteries can be connected?
EcoFlow states DELTA Pro 3 supports up to two smart extra batteries for larger system capacity.
Does it have AC sockets or USB ports?
No. It connects to the DELTA Pro 3 through EcoFlow proprietary battery ports and does not provide standalone AC or USB output.
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