EcoFlow DELTA Pro 3
A 4,096 Wh LFP portable power station with 4,000 W of output, expansion to 12 kWh, 10 ms switchover and a 5-year warranty.
- Best for large-scale backup
- Power station
- 4,096 Wh
- 4,000 W
- Capacity: 4,096 Wh with LFP cells rated for 4,000 cycles to 80%.
- Output: 4,000 W continuous, 8,000 W surge and 6,000 W with X-Boost, over 5 outlets.
- Charges from the mains at up to 2,900 W (0-80% in one hour) or from solar at up to 2,600 W.
- Expands to 12 kWh with up to two Smart Extra Batteries and switches over in 10 ms.
Not tested by us
We have not tested the EcoFlow DELTA Pro 3. The figures on this page come from the sources listed at the end of the page, checked on 10 November 2026, and we do not show prices. "Best for" is based on what the maker says the product is designed for, not on our own tests.
Key figures
4,096 Wh
Capacity
4,000 W
AC output (8,000 W surge)
12 kWh
With two extra batteries
Specifications
Last checked on 10 November 2026. The grey text under each name explains what the value means.
| Specification | Value |
|---|---|
| Storage | |
| CapacityHow much energy the battery stores. Bigger means longer runtime or more of your own solar power used later. | 4,096 Wh |
| Battery chemistryLFP (lithium iron phosphate) cells are known for long life and stable behaviour with heat. | LFP |
| Cycle lifeHow many full charge and discharge cycles the cells are rated for before they hold less than the stated share of their original capacity. | 4,000 cycles to 80% capacity |
| ExpansionExtra battery units that add storage to the same system. | Up to two Smart Extra Batteries (4,096 Wh each, max 33 kg each), for up to 12 kWh |
| Output | |
| AC output (continuous)The power it can deliver all the time. Add up the watts of what you want to run at once and stay below this. | 5 outlets, 4,000 W max |
| AC output (surge)A short burst above the continuous rating, for appliances that draw more power when they start. | 8,000 W |
| X-BoostA mode that can run some devices above the normal output rating by lowering the voltage it supplies. Not suitable for every device. | Surges to 6,000 W when needed |
| USB-APorts for phones, tablets and small devices. | 2 ports, 18 W max each |
| USB-CPorts for laptops, phones and tablets. Power delivery up to 100 W can charge most laptops. | 2 ports, 100 W max each (5-20 V 5 A) |
| Car outletA 12 V socket like the one in a car, for car accessories. | 12 V DC output, 12.6 V 30 A, 378 W total (includes a DC5521 port at 5 A max and an Anderson port at 30 A max) |
| DC5521A small round DC connector used by routers, cameras and LED lights. | Included in the DC output above, 5 A max |
| Charging | |
| AC chargingHow fast it charges from a wall socket. Higher means a shorter wait. | 200-240 V, 12.5 A, 50/60 Hz, 2,900 W max |
| Time to charge from the mainsHow long a full charge takes from a wall socket. | 0-80% in one hour |
| Solar inputHow much solar panel power it accepts. A higher figure fills the battery faster on a sunny day. | 2,600 W across two ports: HPV 30-150 V, 15 A, 1,600 W max; LPV 11-60 V, 20 A, 1,000 W max |
| Solar charging timeHow long a full charge takes from solar panels, in the conditions the maker names. | To 80% in 1.5 hours (EcoFlow's figure; conditions not given in the text we read) |
| Car chargingCharging from a car's 12 V or 24 V socket while driving. Slow, but useful on the road. | 12 V 8 A max or 48 V 20 A max |
| Backup switchover (EPS)What happens when the grid fails. EPS means it takes over automatically. | 10 ms |
| Housing and warranty | |
| Dimensions (L × W × H)Check the space before you buy, including room around it for airflow and cables. | 693 × 341 × 410 mm (main unit; the page gives three numbers without naming the axes) |
| WeightMatters for lifting, wall mounting and moving it. | 51.5 kg |
| Operating temperatureThe range it is rated to work in. Cold and heat can reduce performance. | Discharging -10 to 45 °C; charging 0 to 45 °C |
| Noise levelFan noise while working. | 30 dB at 2,000 W |
| Protection ratingIP ratings show protection from dust and water. IP55 and IP65 are rated for outdoor-style exposure; check the installation guidance. | IP65 for the battery pack; IP20 for the main unit |
| WarrantyThe period the maker covers. Read the terms: conditions and capacity guarantees differ. | 5 years |
How long will it run your devices?
Choose how many of each device you want to run at the same time. The wattages are typical figures, so check the label on your own devices.
| Device | Typical power | How many |
|---|---|---|
| 10 W | ||
| 10 W | ||
| 15 W | ||
| 60 W | ||
| 80 W | ||
| 80 W | ||
| 40 W | ||
| 1,000 W | ||
| 2,000 W | ||
| 1,000 W | ||
| W |
The estimate assumes 85% of the rated capacity is usable after conversion losses. EcoFlow does not state this figure, so we use a cautious assumption. Real running times vary with temperature, battery age and how each device draws power.
Compatible with
What EcoFlow says this product works with. Anything not listed here is not confirmed.
- Extra batteries
- The DELTA Pro 3 Smart Extra Battery, up to two, for up to 12 kWh.
- DELTA Pro (original)
- Not compatible: Not compatible: the DELTA Pro 3 and DELTA Pro main units do not work with each other, and the DELTA Pro 3 Extra Battery does not work with the DELTA Pro.
- Other EcoFlow accessories
- EcoFlow lists an 800 W Alternator Charger, Smart Generator (Dual Fuel), PowerInsight Home Energy Manager and WAVE 2 in its FAQ. The Manual Transfer Switch must be fitted by a qualified electrician.
- App
- The EcoFlow app, over Wi-Fi (2.4 GHz), Bluetooth or CAN.
Rules where you live
A portable power station is not wired into your home, so it is simple to use almost anywhere. Connecting one to your home circuits to power the house is different, and the rules for that vary by country. See our country guides for the rules, incentives and prices where you live.
Strengths and things to check
Strengths
- 4,000 W continuous with an 8,000 W surge
- Expands to 12 kWh
- Up to 2,600 W of solar input
- 10 ms switchover
- 30 dB at 2,000 W (EcoFlow's figure)
- 5-year warranty
Worth checking before you buy
- 51.5 kg: not a portable unit in practice
- Not compatible with the original DELTA Pro or its batteries
- Main unit rated IP20: not for wet outdoor use
- At full output the base unit runs for about an hour
- Not a home battery: do not connect it to your home circuits in a way that lets it feed the house
Change log
We record changes to this page here, so you can see when figures such as the warranty were last updated.
- 10 November 2026
- Page published. Warranty at publication: 5 years (EcoFlow UK product page).
Where this information comes from
We have not tested the DELTA Pro 3. Every figure above comes from EcoFlow's UK product page, last checked on 10 November 2026. The page mentions a US model whose grid port is limited; we show the values for the 200-240 V version. A value that the page does not state is shown as not stated.
We do not show prices, because they change often and differ between sellers.
- Manufacturer EcoFlow UK DELTA Pro 3 page
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Common questions about EcoFlow DELTA Pro 3
What can the DELTA Pro 3 run?
With 4,000 W of continuous output (6,000 W with X-Boost) it can run most household appliances at once. Divide 4,096 Wh by the total draw for a rough running time, which will be lower in practice.
Can the DELTA Pro 3 be expanded?
Yes. EcoFlow says up to two Smart Extra Batteries can be connected, for up to 12 kWh. They work only with the DELTA Pro 3, not the original DELTA Pro.
Is the DELTA Pro 3 the same as a home battery?
No. It is a portable power station that you plug devices into. An installed home battery is wired into your electrics by an electrician. See our guide to plug-in and installed home batteries.
Related guides
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