EF ECOFLOW DELTA Pro 3 Extra Battery, 4096Wh

EF ECOFLOW DELTA Pro 3 Extra Battery is a 4096Wh LFP expansion battery for the DELTA Pro 3 power station. It is aimed at buyers who want additional stored energy for home backup, camping or motorhome use, but it is an expansion unit rather than a clearly documented standalone power station.

At a glance

Designed as an additional battery for the DELTA Pro 3, with claims of up to 12kWh total capacity when expanded.
LFP cells are claimed to retain 80% capacity after 4000 cycles.
The listing describes support for 230V and 4000W output, but presents this as a product output claim rather than a clearly explained battery-only specification.

Price

£1,595.05Save 27%

Reference price: ~~£2,199.00~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

The stated 4096Wh capacity gives DELTA Pro 3 owners a substantial extra energy store.
The LFP chemistry and stated 4000-cycle figure provide useful longevity context for frequent backup or off-grid use.
The listing describes parallel expansion with up to two extra batteries on the DELTA Pro 3.

Cons

This is an add-on battery intended for the DELTA Pro 3, so it is not the straightforward choice for someone seeking a complete standalone power station.

Technical specifications

10 specifications

Identity
Brand	EF ECOFLOW
Model	Delta Pro 3
Power configuration	Battery

Dimensions and installation
Dimensions listed	40L x 40W x 40H centimetres

Materials and protection
Material listed	Metal (Likely Steel Or Aluminum)

Battery and expansion claims
Capacity in title	4096Wh
Battery chemistry	LFP battery cells
Cycle life claim	4000 cycles till it reduces to an 80% capacity
Maximum stated capacity with expansion	12kWh
Battery warranty claim	5 years.

What to know before buying

Listing details to confirm

Listing details are inconsistent: the title says 4096Wh while feature text calls it 4000Wh, and separate generator-style fields list 12V, one outlet, 6000W starting power, 4000W running power, 50Hz and a two-hour runtime without clearly establishing that they apply to this extra battery. Output, X-Boost and charging-method claims describe the wider DELTA Pro 3 system, so confirm the selected configuration and compatibility before purchase.

What’s in the box

Included

EcoFlow DELTA Pro 3

Who is it for?

A good fit for

DELTA Pro 3 owners who want more stored energy for home backup, emergencies or extended trips.
Buyers considering a modular battery expansion for camping or motorhome use.

Less suited to

Shoppers who need a complete power station and have no DELTA Pro 3 system to pair it with.
Buyers who need a clearly specified standalone outlet or runtime configuration.

EF ECOFLOW DELTA Pro 3 Extra Battery, 4096Wh · photo 2 — Additional product photo 2

Customer reviews on Amazon

3.8 / 5 · 9 ratings

5 stars60%60%
4 stars16%16%
3 stars0%0%
2 stars0%0%
1 star24%24%

Customer rating figures are mixed, with five-star ratings forming the largest share but a notable one-star share as well. With a small rating sample and no written feedback supplied, these figures do not explain the reasons behind the ratings or establish specific strengths or faults. Buyers should base compatibility and capacity decisions on the DELTA Pro 3 system details and confirm the kit contents.

Frequently asked questions

Does this listing describe a complete power station?

It is titled as an extra battery for the DELTA Pro 3. The listing's included-components field also names the DELTA Pro 3, so check the selected listing carefully to confirm exactly what is supplied.

How much capacity can the system reach?

The listing says extra batteries can expand the DELTA Pro 3 to 12kWh and that up to two batteries can be connected in parallel. Its capacity figures differ between the 4096Wh title and 4000Wh feature text.

What battery lifespan does the listing claim?

It claims 4000 cycles before the battery reduces to 80% capacity, described as almost 11 years of regular use. Actual lifespan depends on use and conditions, which the listing does not specify.