EcoFlow DELTA 2 Max
#17 in LargeFull review
A proven 2kWh LiFePO4 station for home backup and RV trips with plenty of outlets. It costs less than the DELTA 3 Max Plus but has slower switchover and less output.
Amazon $1,049 EcoFlow $1,049$1,049
The EcoFlow DELTA 2 Max is the better portable power station overall, rated 4.0 to 3.8. The EcoFlow DELTA 2 Max leads on battery life, solar input and features. The EcoFlow DELTA 3 Max wins on value and portability. The EcoFlow DELTA 3 Max costs $150 less ($899 vs $1,049).
EcoFlow DELTA 3 Max
#22 in LargeFull review
For buyers who want 2 kWh of fast-charging backup at a mid-range price and do not need heavy solar input.
Amazon $899 EcoFlow $899$899
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 2 Max for battery life (LiFePO4, 3,000 cycles, 5-year warranty vs LiFePO4, 5-year warranty), solar input (1,000 W max solar input vs 500 W max solar input) and features (UPS (30 ms), expandable, 100 W USB-C, app vs UPS (10 ms), 100 W USB-C, app).
- Choose the EcoFlow DELTA 3 Max for value ($0.44 per rated Wh vs $0.51 per rated Wh) and portability (101 Wh per kg (44.8 lb (20.3 kg)) vs 89 Wh per kg (50 lb (23 kg))).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every large portable power station; a clear win is highlighted. How we rank explains each one.
| Factor weight | EcoFlow DELTA 2 Max | EcoFlow DELTA 3 Max |
|---|---|---|
| Overall rating | 4.0/5 | 3.8/5 |
| Value 25% | 67 $0.51 per rated Wh | 79 $0.44 per rated Wh |
| Tested capacity 15% | 81 88% of rated capacity delivered (1 test) | 50 not yet independently tested (neutral score used) |
| Battery life 15% | 91 LiFePO4, 3,000 cycles, 5-year warranty | 70 LiFePO4, 5-year warranty |
| AC output 15% | 54 2,400 W continuous AC | 54 2,400 W continuous AC |
| Charging speed 10% | 50 full AC charge time not published (neutral score used) | 50 full AC charge time not published (neutral score used) |
| Portability 10% | 80 89 Wh per kg (50 lb (23 kg)) | 100 101 Wh per kg (44.8 lb (20.3 kg)) |
| Solar input 5% | 40 1,000 W max solar input | 11 500 W max solar input |
| Features 5% | 100 UPS (30 ms), expandable, 100 W USB-C, app | 75 UPS (10 ms), 100 W USB-C, app |
Independent capacity tests
EcoFlow DELTA 2 Max
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| StorageReview | 1,800 Wh | 88% | AC discharge at a 350W load. Recharge took 2,370 Wh from the wall. |
EcoFlow DELTA 3 Max
No independent test published yet.
Specifications
| EcoFlow DELTA 2 Max | EcoFlow DELTA 3 Max | |
|---|---|---|
| Battery | ||
| Rated capacity | 2,048 Wh | 2,048 Wh |
| Tested usable capacity | 1,800 Wh (88%) | - |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 3,000 to 80% | - |
| Expandable | Yes, up to 6,144 Wh | - |
| Output | ||
| AC output | 2,400 W (4,800 W surge) | 2,400 W (4,800 W surge) |
| Boost mode (resistive loads) | 3,400 W | 3,400 W |
| AC outlets | 6 total | 4 total |
| 120V 20A outlets (NEMA 5-20R) | 6 | 4 |
| USB-C ports | 2 (up to 100 W each) | 3 (up to 100 W each) |
| USB-A ports | 4 | 1 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 2 | - |
| UPS / pass-through | Yes (30 ms switchover) | Yes (10 ms switchover) |
| Charging | ||
| AC charging | 1,800 W | 1,800 W |
| Max solar input | 1,000 W | 500 W |
| Solar input voltage | 11-60V, 15A (2 inputs, 500W each) | - |
| Build | ||
| Weight | 50 lb (23 kg) | 44.8 lb (20.3 kg) |
| Dimensions | 19.6 x 9.5 x 12 in | 494 x 239 x 305 mm |
| App | EcoFlow app (Wi-Fi and Bluetooth) | Wi-Fi + Bluetooth |
| Warranty | 5 years | 5 years |