EcoFlow DELTA 3 Max Plus
#25 in LargeFull review
A 2kWh home-backup station with enough output for most household circuits and room to expand to 10 kWh. A good fit for buyers who want to start mid-size and grow later.
Amazon $1,199$1,199
The EcoFlow DELTA 3 Max Plus rates 3.7 among large portable power stations; the EcoFlow DELTA Pro rates 3.7 among home backup ones. The EcoFlow DELTA 3 Max Plus costs $600 less ($1,199 vs $1,799).
EcoFlow DELTA Pro
#21 in Home backupFull review
A heavy 3.6kWh station built for home backup that can grow into a 25 kWh system. It still makes sense if you want that expansion path, but newer models give similar capacity for less.
Amazon $1,799$1,799
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 3 Max Plus | EcoFlow DELTA Pro |
|---|---|---|
| Overall rating | 3.7/5 | 3.7/5 |
| Value 25% | 56 $0.59 per rated Wh | 69 $0.50 per rated Wh |
| Tested capacity 15% | 46 80% of rated capacity delivered (1 test) | 66 84% of rated capacity delivered (2 tests) |
| Battery life 15% | 70 LiFePO4, 5-year warranty | 96 LiFePO4, 3,500 cycles, 5-year warranty |
| AC output 15% | 79 3,000 W continuous AC | 37 3,600 W continuous AC |
| Charging speed 10% | 50 full AC charge time not published (neutral score used) | 41 0-100% on AC in 2 h 42 min |
| Portability 10% | 87 93 Wh per kg (48.7 lb (22.1 kg)) | 64 80 Wh per kg (99 lb (45 kg)) |
| Solar input 5% | 40 1,000 W max solar input | 35 1,600 W max solar input |
| Features 5% | 100 UPS (10 ms), expandable, 140 W USB-C, app | 65 expandable, 100 W USB-C, app |
Independent capacity tests
EcoFlow DELTA 3 Max Plus
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| StorageReview | 1,640 Wh | 80% | Full 100%-to-0% AC discharge; load not specified. Recharge took 2.33 kWh from the wall. Measured UPS switchover: 8 ms. |
EcoFlow DELTA Pro
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| OutdoorGearLab | 3,060 Wh | 85% | AC discharge test; the review’s spec table lists 2,950 Wh. Measured AC recharge took a little over 2 hours. |
| The Solar Lab | - | 84% | AC discharge; load not specified. AC recharge took about 2 h 15 min; idle draw 21W. |
Specifications
| EcoFlow DELTA 3 Max Plus | EcoFlow DELTA Pro | |
|---|---|---|
| Battery | ||
| Rated capacity | 2,048 Wh | 3,600 Wh |
| Tested usable capacity | 1,640 Wh (80%) | 3,042 Wh (84%) |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | - | 3,500 to 80% (6,500 to 50%) |
| Expandable | Yes, up to 10,000 Wh | Yes, up to 25,000 Wh |
| Output | ||
| AC output | 3,000 W (6,000 W surge) | 3,600 W (7,200 W surge) |
| Boost mode (resistive loads) | 3,800 W | 4,500 W |
| AC outlets | 4 total | 5 total |
| 120V 20A outlets (NEMA 5-20R) | 4 | 4 |
| RV 30A outlet (TT-30R) | - | 1 |
| AC waveform | Pure sine wave | Pure sine wave |
| USB-C ports | 3 (up to 140 W each) | 2 (up to 100 W each) |
| USB-A ports | 1 | 4 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 0 | 2 |
| UPS / pass-through | Yes (10 ms switchover) | - |
| Charging | ||
| AC charging | 1,800 W | 1,800 W |
| Full AC charge time | - | 2 h 42 min (2.7 h at 1800W on 120V; 1.8 h at 3000W on 240V) |
| Max solar input | 1,000 W | 1,600 W |
| Solar input voltage | 11-60V, 18A max (2 XT60i inputs) | 11-150V, 15A |
| Car charging | 96 W | 96 W |
| Build | ||
| Weight | 48.7 lb (22.1 kg) | 99 lb (45 kg) |
| Dimensions | 19.4 x 9.5 x 12.0 in | 25 x 11.2 x 16.4 in |
| App | EcoFlow app (Wi-Fi and Bluetooth) | EcoFlow app (Wi-Fi and Bluetooth) |
| Warranty | 5 years | 5 years |
| Released | 2025-09 | 2021 |