EcoFlow DELTA 3
#11 in Mid-sizeFull review
A well-rounded 1kWh LiFePO4 station for home backup and car camping that charges from the wall in under an hour.
Amazon $629 EcoFlow $629$629
The EcoFlow DELTA 3 is the better portable power station overall, rated 4.2 to 4.1. The EcoFlow DELTA 3 leads on battery life and features. The EcoFlow DELTA 3 Classic wins on value. The EcoFlow DELTA 3 Classic costs $130.01 less ($498.99 vs $629).
EcoFlow DELTA 3 Classic
#21 in Mid-sizeFull review
A low-cost 1kWh LiFePO4 station for home backup and car camping where AC outlets are all you need. Pick the DELTA 3 Plus instead if you want 12V outputs, faster solar charging or an extra battery later.
Amazon $498.99 EcoFlow $499$498.99
Prices were last checked October 20, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the EcoFlow DELTA 3 for battery life (LiFePO4, 4,000 cycles, 5-year warranty vs LiFePO4, 5-year warranty) and features (UPS (10 ms), expandable, 100 W USB-C, app vs UPS (10 ms), 100 W USB-C, app).
- Choose the EcoFlow DELTA 3 Classic for value ($0.49 per rated Wh vs $0.61 per rated Wh).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every mid-size portable power station; a clear win is highlighted. How we rank explains each one.
| Factor weight | EcoFlow DELTA 3 | EcoFlow DELTA 3 Classic |
|---|---|---|
| Overall rating | 4.2/5 | 4.1/5 |
| Value 25% | 65 $0.61 per rated Wh | 82 $0.49 per rated Wh |
| Tested capacity 15% | 68 85% of rated capacity delivered (1 test) | 50 not yet independently tested (neutral score used) |
| Battery life 15% | 100 LiFePO4, 4,000 cycles, 5-year warranty | 70 LiFePO4, 5-year warranty |
| AC output 15% | 82 1,800 W continuous AC | 82 1,800 W continuous AC |
| Charging speed 10% | 97 0-100% on AC in 56 min | 95 0-100% on AC in 1 h |
| Portability 10% | 67 82 Wh per kg (27.6 lb (12.5 kg)) | 72 85 Wh per kg (26.7 lb (12.1 kg)) |
| Solar input 5% | 40 500 W max solar input | 40 500 W max solar input |
| Features 5% | 100 UPS (10 ms), expandable, 100 W USB-C, app | 75 UPS (10 ms), 100 W USB-C, app |
Independent capacity tests
EcoFlow DELTA 3
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| OutdoorGearLab | 870 Wh | 85% | Light-bar load bank at roughly 80% of rated AC output, 100% to shutdown, measured at the AC outlet. |
EcoFlow DELTA 3 Classic
No independent test published yet.
Specifications
| EcoFlow DELTA 3 | EcoFlow DELTA 3 Classic | |
|---|---|---|
| Battery | ||
| Rated capacity | 1,024 Wh | 1,024 Wh |
| Tested usable capacity | 870 Wh (85%) | - |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 4,000 to 80% | - |
| Expandable | Yes, up to 5,000 Wh | No |
| Output | ||
| AC output | 1,800 W (3,600 W surge) | 1,800 W (3,600 W surge) |
| Boost mode (resistive loads) | 2,200 W | 2,600 W |
| AC outlets | 6 total | 3 total |
| 120V 20A outlets (NEMA 5-20R) | 3 | 2 |
| 120V 2-prong outlets (NEMA 1-15R) | 3 | 1 |
| AC waveform | - | Pure sine wave |
| USB-C ports | 2 (up to 100 W each) | 2 (up to 100 W each) |
| USB-A ports | 2 | 1 |
| 12 V car outlet | Yes | No |
| DC5521 ports | 2 | 0 |
| UPS / pass-through | Yes (10 ms switchover) | Yes (10 ms switchover) |
| Charging | ||
| AC charging | 1,500 W | 1,400 W |
| Full AC charge time | 56 min | 1 h (0-80% in 45 min) |
| Max solar input | 500 W | 500 W |
| Solar input voltage | 11-60V | - |
| Car charging | 800 W | - |
| Build | ||
| Weight | 27.6 lb (12.5 kg) | 26.7 lb (12.1 kg) |
| Dimensions | 15.7 x 8.0 x 11.2 in | 398 x 200 x 283 mm |
| App | EcoFlow app | EcoFlow app (Wi-Fi and Bluetooth) |
| Warranty | 5 years | 5 years |