EcoFlow DELTA 3 Classic Portable Power Station Review
A 1,024 Wh LFP station with 1,800 W of AC output, X-Boost to 2,600 W, a 60-minute wall recharge and a 10 ms UPS switchover.
By Watt Versus Editorial· Updated
This page was drafted with AI assistance from manufacturers' specs and manuals, and is checked by our editor.
Our verdict
A good 1 kWh station for home backup without plans to add batteries. If you want more solar input, faster USB-C or expansion, pay up for the DELTA 3 Plus.
Pros and cons
Pros
- Full wall recharge in 60 minutes, 0-80% in 45, by EcoFlow's figures
- 1,800 W of output, with X-Boost for heaters up to 2,600 W
- 10 ms UPS switchover
- 1 lb lighter than the DELTA 3 Plus
Cons
- 500 W of solar input, half the DELTA 3 Plus's 1,000 W
- USB-C tops out at 100 W on one port and 30 W on the other
- EcoFlow gives no cycle-life rating and does not say it can be expanded
- Five-year warranty needs app registration
Specifications
| Capacity | 1,024 Wh |
|---|---|
| Battery chemistry | LiFePO4 (LFP) |
| AC output | 1,800 W (X-Boost up to 2,600 W) |
| Peak output | 3,600 W surge |
| USB-C output | 1 x 100 W, 1 x 30 W |
| Wall recharge | 0-80% in 45 minutes, full in 60 minutes |
| Max solar input | 500 W |
| Backup switchover | 10 ms |
| Weight | 26.6 lb (12.1 kg) |
| Dimensions | 15.6 x 7.8 x 11.2 in |
| Warranty | 3 years, 5 with app registration |
Who it suits
Households that want about 1 kWh for outages, a fast wall recharge and a UPS fast enough for a router or desktop. EcoFlow rates a full recharge at 60 minutes and the switchover at 10 ms.
The obvious alternative is the EcoFlow DELTA 3 Plus: see DELTA 3 Classic vs DELTA 3 Plus.
Who should skip it
Anyone who plans to grow capacity later or recharge mainly from solar. EcoFlow's DELTA 3 Classic pages do not mention extra-battery support, and solar input stops at 500 W.
What we could not confirm
EcoFlow's US pages give a lifespan estimate of about 10 years but no cycle-life rating, and they do not state the number of AC outlets on the US model; regional pages differ. Both are left out of the table.
Frequently asked questions
- How fast does the DELTA 3 Classic recharge?
- EcoFlow rates it at 0-80% in 45 minutes and a full charge in 60 minutes from a wall outlet.
- Can the DELTA 3 Classic be expanded?
- EcoFlow's product pages for the DELTA 3 Classic do not mention extra-battery support. If you want expansion, the DELTA 3 Plus can grow to about 5 kWh.
- What is the DELTA 3 Classic warranty?
- Three years standard, plus two more years when you register the unit in the EcoFlow app, according to EcoFlow.
Sources
The specifications and claims on this page come from these manufacturer documents. Figures are the manufacturers' own unless the text says otherwise.
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VS comparison
EcoFlow DELTA 3 Classic Portable Power Station vs EcoFlow DELTA 3 Plus Portable Power Station
Same 1,024 Wh capacity, 1,800 W output and 3,600 W surge. The Plus adds double the solar input, faster USB-C, a cycle rating and expansion; the Classic recharges to 80% faster and weighs a pound less.
Updated October 22, 2026
Best of
Best 1,000 Wh Portable Power Stations (2026)
Seven 1 kWh stations ranked on the manufacturers' numbers: output, cycle life, wall and solar recharge, expansion and weight.
Updated October 22, 2026