EcoFlow DELTA 3 Classic
EcoFlow’s DELTA performance at a budget price: 1 kWh, 1,800 W and a full recharge in under an hour. You give up extra outlets and expansion.
- Continuous AC output
- 1,800W
- AC recharge time
- 55min
- Max solar input
- 500W
- Weight
- 26.7lb
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The DELTA 3 Classic strips the DELTA 3 Plus down to the essentials. You still get 1,024 Wh of LiFePO4, 1,800 W continuous with 3,600 W surge, X‑Boost up to 2,600 W and a UPS that switches in under 10 ms.
The Solar Lab measured a full wall charge in just under 55 minutes, about 83% inverter efficiency and a low 17 W idle draw, and called it close to silent. The savings come from fewer ports: three AC outlets (one ungrounded), two USB‑C and one USB‑A, with no 12 V socket and no expansion battery support.
Pros
- Full recharge in about 55 minutes
- Same 1,800 W output as pricier DELTA models
- Sub‑10 ms UPS
- Quiet, with low idle draw
Cons
- Only six outputs, one AC outlet ungrounded
- No 12 V car socket
- Not expandable
- Cycle rating not published
Who it’s for
- A first home‑backup unit on a budget
- Running a fridge or CPAP overnight
- Camping trips where you need a few big outlets
Technical specifications
| Capacity | 1,024 Wh |
|---|---|
| Battery chemistry | LiFePO4 |
| Cycle life (to 80%) | — |
| Continuous AC output | 1,800 W |
| Surge power | 3,600 WX‑Boost up to 2,600 W for resistive loads |
| AC recharge time | 55 minmeasured 0–100% at 1,400 W · 0–80% in 45 min |
| Max solar input | 500 W |
| Weight | 26.7 lb (12.1 kg) |
| Total outputs | 6 |
| UPS switchover | ≤ 10 ms |
| Expandable | No |
| App control | Wi‑Fi + Bluetooth |
| Noise | —near‑silent in tests |
| Dimensions | 15.7 × 7.9 × 11.1 in |
Performance profile
Scores are calculated from the published specs on a 0–10 scale, so every model is measured the same way.
How long will it run?
- Wi‑Fi router + modem 20 W44 h+
- CPAP machine 40 W22 h
- Fridge (average draw) 60 W15 h
- Laptop 60 W15 h
- 55" TV 100 W8.7 h
- Drip coffee maker 1,000 W0.9 h
- Space heater 1,500 W0.6 h
Estimated with 85% inverter efficiency. Real runtimes vary with temperature and load.
What reviewers and owners say
The Solar Lab praised the price, the 55‑minute recharge, its efficiency and how quiet it is. Their criticism centered on the limited outputs, the missing 12 V socket and light, and the lack of expansion. With 1,385 ratings, it averages 4.7 out of 5 on Amazon.
Most praised
- Price
- Charging speed
- Silence
Most common complaints
- Few outputs
- No 12 V socket
Sources: The Solar Lab · Amazon
EcoFlow DELTA 3 Classic
EcoFlow’s DELTA performance at a budget price: 1 kWh, 1,800 W and a full recharge in under an hour. You give up extra outlets and expansion.