EcoFlow DELTA 3 Classic Review: Specs in Plain Words
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At a glance
Best fast-charge 1 kWh boxEcoFlow DELTA 3 ClassicCheck price on Amazon
The EcoFlow DELTA 3 Classic suits a buyer who wants about 1 kWh at home or at camp, with a wall refill in about an hour. It fills to 80% in 45 minutes on AC, and to full in 60 minutes.
The makers’ published specs, current in November 2026, are the basis of this review. PowerPicked Editorial did not test the DELTA 3 Classic.
Wh counts the energy a battery stores. Watts count power, written W. AC output is the plug-in power a station can send out. Solar input is the panel power a station takes at most.
EcoFlow DELTA 3 Classic
- Capacity
- 1,024 Wh
- AC output
- 1,800 W
- Solar input
- 500 W
- Weight
- 26.7 lb
Who it's for: Buyers who want a 1 kWh home or camping unit that refills from the wall in about an hour.
Strengths
- 0-80% in 45 minutes on AC
- 10 ms UPS switchover
- LiFePO4 battery
Weaknesses
- Solar input tops out at 500 W
- Full 5-year warranty needs app registration
- Only one 18 W USB-A port
What does the EcoFlow DELTA 3 Classic hold?
The DELTA 3 Classic carries 1,024 Wh in a LiFePO4 battery. It puts out 1,800 W of AC, with X-Boost to 2,600 W. The Amazon listing photos show three AC outlets. One 100 W USB-C port and one 30 W USB-C port sit on it, plus one 18 W USB-A port.
For the runtime math in this review, assume 85% of the listed capacity reaches your devices. Eighty-five percent of the listed 1,024 Wh gives 870.4 Wh of usable energy. A 100 W load gets 8.7 hours from that energy. Dividing 1,024 Wh by 26.7 lb gives about 38.4 Wh per pound.
AC charging runs at 1,400 W at most, reaching 80% in 45 minutes and full in 60 minutes. Solar input is capped at 500 W, and a full charge takes 2.5 hours with 500 W of solar. A car, a generator, or the EcoFlow 500 W Alternator Charger can charge it too. The UPS mode switches in 10 ms. Wi-Fi and Bluetooth link it to the app.
It measures 398 by 200 by 283 mm and weighs about 26.7 lb. The warranty runs 5 years: 3 years standard, plus 2 more after app registration.
How does the EcoFlow DELTA 3 Classic compare?
By capacity, the two closest stations are the EcoFlow DELTA 3 Plus and the BLUETTI Elite 100 V2, both at 1,024 Wh. Usable energy and runtime in the rows below rest on 85% of the listed capacity, assumed.
| EcoFlow DELTA 3 Classic | EcoFlow DELTA 3 Plus | BLUETTI Elite 100 V2 | |
|---|---|---|---|
| Capacity | 1,024 Wh | 1,024 Wh | 1,024 Wh |
| AC output | 1,800 W | 1,800 W | 1,800 W |
| Solar input | 500 W | 1,000 W | 1,000 W |
| Weight | 26.7 lb | 27.6 lb | 25 lb |
| Usable energy at 85% | 870.4 Wh | 870.4 Wh | 870.4 Wh |
| Runtime at 100 W | about 8.7 hours | about 8.7 hours | about 8.7 hours |
| Wh per pound | about 38.4 | about 37.1 | about 41.0 |
All three hold 1,024 Wh and put out 1,800 W, so the differences sit in solar input and weight. The DELTA 3 Plus and the Elite 100 V2 take up to 1,000 W of solar, twice the Classic’s 500 W. The Elite 100 V2 is the lightest of the three, at 25 lb, and the Classic sits in the middle, at 26.7 lb. The Classic reaches 80% in 45 minutes on AC, the same as the Elite 100 V2.
How to choose
Begin with the output your gear needs. Capacity sets how long the station runs before a top-up. Panels refill it faster with a higher solar input. A lighter box is easier to carry. A UPS mode keeps gear online in a power cut. Charge speed sets how fast the station fills from AC.
FAQ
How fast does it fill from the wall?
It reaches 80% in 45 minutes on AC, and full in 60 minutes.
What USB ports does it have?
One 100 W USB-C port, one 30 W USB-C port, and one 18 W USB-A port.
How fast does it switch in a power cut?
It switches in 10 ms.
What is its solar input limit?
500 W at most, and a full charge takes 2.5 hours with 500 W of solar.
