EcoFlow DELTA 2 Max
#9 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$1,049
The EcoFlow DELTA 2 Max rates 4.1 among large portable power stations; the EcoFlow DELTA Pro 3 rates 3.8 among home backup ones. The EcoFlow DELTA 2 Max costs $1,750 less ($1,049 vs $2,799).
EcoFlow DELTA Pro 3
#16 in Home backupFull review
For households that want a single wheeled unit able to back up 240V circuits and expand toward whole-home capacity.
Amazon $2,799$2,799
Prices were last checked October 24, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different size classes (large and home backup), and each is scored against the reference points for its own class, so a rating says how well each does among its own size peers. How we rank explains each factor.
| Factor weight | EcoFlow DELTA 2 Max | EcoFlow DELTA Pro 3 |
|---|---|---|
| Overall rating | 4.1/5 | 3.8/5 |
| Value 25% | 67 $0.51 per rated Wh | 41 $0.68 per rated Wh |
| Tested capacity 15% | 81 88% of rated capacity delivered (1 test) | 100 93% of rated capacity delivered (1 test) |
| Battery life 15% | 91 LiFePO4, 3,000 cycles, 5-year warranty | 100 LiFePO4, 4,000 cycles, 5-year warranty |
| AC output 15% | 54 2,400 W continuous AC | 46 4,000 W continuous AC |
| Charging speed 10% | 84 0-100% on AC in 1 h 20 min | 50 full AC charge time not published (neutral score used) |
| Portability 10% | 80 89 Wh per kg (50 lb (23 kg)) | 63 80 Wh per kg (113.5 lb (51.5 kg)) |
| Solar input 5% | 40 1,000 W max solar input | 57 2,600 W max solar input |
| Features 5% | 100 UPS (30 ms), expandable, 100 W USB-C, app | 100 UPS (10 ms), expandable, 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 Pro 3
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| OutdoorGearLab | 3,790 Wh | 92.5% | Full-discharge AC test; OutdoorGearLab states over 93%, 3790/4096 works out to 92.5%. Recharged from empty in about 3.2 h at about 1600W peak. |
Specifications
| EcoFlow DELTA 2 Max | EcoFlow DELTA Pro 3 | |
|---|---|---|
| Battery | ||
| Rated capacity | 2,048 Wh | 4,096 Wh |
| Tested usable capacity | 1,800 Wh (88%) | 3,790 Wh (93%) |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 3,000 to 80% | 4,000 to 80% |
| Expandable | Yes, up to 6,144 Wh | Yes, up to 12,000 Wh |
| Output | ||
| AC output | 2,400 W (4,800 W surge) | 4,000 W (8,000 W surge) |
| Boost mode (resistive loads) | 3,400 W | 6,000 W |
| AC outlets | 6 total | 7 total |
| 120V 20A outlets (NEMA 5-20R) | 6 | 4 |
| RV 30A outlet (TT-30R) | - | 1 |
| 120/240V 30A twist-lock (NEMA L14-30R) | - | 1 |
| 240V 20A outlet (NEMA 6-20R) | - | 1 |
| AC waveform | Pure sine wave | Pure sine wave |
| USB-C ports | 2 (up to 100 W each) | 2 (up to 100 W each) |
| USB-A ports | 4 | 2 |
| 12 V car outlet | Yes | - |
| DC5521 ports | 2 | 1 |
| UPS / pass-through | Yes (30 ms switchover) | Yes (10 ms switchover) |
| Charging | ||
| AC charging | 1,800 W | 1,800 W |
| Full AC charge time | 1 h 20 min (0-80% in 1.1 h on AC alone; 43 min with AC and solar together) | - |
| Max solar input | 1,000 W | 2,600 W |
| Solar input voltage | 11-60V, 15A (2 inputs, 500W each) | HV 30-150V (1600W) + LV 11-60V (1000W) |
| Car charging | 96 W | 96 W |
| Build | ||
| Weight | 50 lb (23 kg) | 113.5 lb (51.5 kg) |
| Dimensions | 19.6 x 9.5 x 12 in | 27.28 x 16.16 x 13.43 in |
| App | EcoFlow app (Wi-Fi and Bluetooth) | Wi-Fi + Bluetooth |
| Warranty | 5 years | 5 years |
| Released | 2023-05 | 2024-06 |