EcoFlow · power station
EcoFlow DELTA Pro 3
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Keeps a fridge-freezer, router, two lamps and phones going for about 49 hours in a power cut. Powerful enough for a 3 kW kettle. Switches over in 10 ms or less when the mains fails. Battery cost over its rated life works out at about 17p per kWh.
Spec score 8.8/10 in home backup (over 2,500 ) · how we score
From £2,799 In stock
Check price at EcoFlow UK- ✓ Kettle (3 kW)
- ✓ Microwave
- ✓ Fridge-freezer
- ✓ CPAP
Typical appliance figures; check your own appliances.
Why it's worth a look
- Keeps a fridge-freezer, router, two lamps and phones going for about 49 hours in a power cut.
- Boils a 3 kW kettle, so a cup of tea survives the power cut.
- Takes over in 10 ms when the mains drops: fast enough for computers and most CPAP machines.
- battery rated for 4,000 cycles: over 76 years of weekly use.
- Takes up to 2,600 W of solar, so it can refill in a long cut or off-grid.
- Expandable to 12,000 Wh with extra batteries.
- 5-year warranty.
Watch out for
- Heavy at 51.5 kg: think about who will move it.
Reliability signals
- Warranty: 5 years (maker's UK page)
- Battery: LFP, 4,000 cycles to 80% capacity
- Repairs: through the maker's UK support; we list known issues only from named reviews, and none are recorded yet
Owned one? Tell other buyers how it has held up.
Where it ranks in our lists
- #9 in Best portable power stations in the UK
- #6 in Best power stations for power cuts
- #2 in Power stations that will boil a 3 kW kettle
- #4 in Power stations for a CPAP machine
- #4 in Best power stations for home backup
- #7 in Best power stations for working from home
- #3 in Best power stations for vans and off-grid weekends
Specifications
| Capacity | 4,096 Wh |
|---|---|
| Continuous output | 4,000 W |
| Surge / peak | 8,000 W |
| 3-pin sockets | 5 |
| Battery type | LFP |
| Rated cycles | 4,000 (to 80%) |
| Weight | 51.5 kg |
| Mains charge to full | 0-80% in about an hour (EcoFlow's figure using several inputs at once) |
| Max solar input | 2,600 W |
| UPS switch-over | 10 ms |
| Expandable to | 12,000 Wh |
| Fastest USB-C | not published |
| Warranty | 5 years |
| App | Wi-Fi and Bluetooth |
| Noise (maker's figure) | 30 dB |
Sources (1)
- EcoFlow UK (official store): product page and specifications, checked 22 Oct 2026
Where to buy
| Seller | Price | |
|---|---|---|
| EcoFlow UK (official store) | £2,799 | Check price |
Also sold as (9 bundles and options)
| Seller's version | Price | Stock |
|---|---|---|
| DELTA Pro 3 + RAPID Pro 27000mAh | £2,969 | Sold out |
| DELTA Pro 3 + 400W Portable Solar Panel | £2,881 | In stock |
| DELTA Pro 3 + 220W Portable Solar Panel | £2,833 | In stock |
| DELTA Pro 3 + 2 x 220W Portable Solar Panel | £3,497 | In stock |
| DELTA Pro 3 + Smart Extra Battery | £4,318 | In stock |
| DELTA Pro 3 + 2 x Smart Extra Battery | £6,117 | In stock |
| DELTA Pro 3 + Manual Transfer Switch | £2,968 | Sold out |
| DELTA Pro 3 + Manual Transfer Switch + 400W Rigid Solar Panel x 2 | £3,317 | Sold out |
| DELTA Pro 3 + Alternator Charger + Smart Generator Adapter | £3,128 | Sold out |
Price from the seller's own UK page. Prices change; the seller's page is always right.
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