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
The EcoFlow DELTA 3 Max and the EcoFlow DELTA 3 Max Plus are evenly matched, rated 3.8 and 3.7. The EcoFlow DELTA 3 Max leads on value and portability. The EcoFlow DELTA 3 Max Plus wins on AC output, solar input and features. The EcoFlow DELTA 3 Max costs $300 less ($899 vs $1,199).
EcoFlow DELTA 3 Max Plus
#23 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 EcoFlow $1,199$1,199
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 Max for value ($0.44 per rated Wh vs $0.59 per rated Wh) and portability (101 Wh per kg (44.8 lb (20.3 kg)) vs 93 Wh per kg (48.7 lb (22.1 kg))).
- Choose the EcoFlow DELTA 3 Max Plus for AC output (3,000 W continuous AC vs 2,400 W continuous AC), solar input (1,000 W max solar input vs 500 W max solar input) and features (UPS (10 ms), expandable, 140 W USB-C, app vs UPS (10 ms), 100 W USB-C, app).
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 3 Max | EcoFlow DELTA 3 Max Plus |
|---|---|---|
| Overall rating | 3.8/5 | 3.7/5 |
| Value 25% | 79 $0.44 per rated Wh | 56 $0.59 per rated Wh |
| Tested capacity 15% | 50 not yet independently tested (neutral score used) | 46 80% of rated capacity delivered (1 test) |
| Battery life 15% | 70 LiFePO4, 5-year warranty | 70 LiFePO4, 5-year warranty |
| AC output 15% | 54 2,400 W continuous AC | 79 3,000 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% | 100 101 Wh per kg (44.8 lb (20.3 kg)) | 87 93 Wh per kg (48.7 lb (22.1 kg)) |
| Solar input 5% | 11 500 W max solar input | 40 1,000 W max solar input |
| Features 5% | 75 UPS (10 ms), 100 W USB-C, app | 100 UPS (10 ms), expandable, 140 W USB-C, app |
Independent capacity tests
EcoFlow DELTA 3 Max
No independent test published yet.
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. |
Specifications
| EcoFlow DELTA 3 Max | EcoFlow DELTA 3 Max Plus | |
|---|---|---|
| Battery | ||
| Rated capacity | 2,048 Wh | 2,048 Wh |
| Tested usable capacity | - | 1,640 Wh (80%) |
| Chemistry | LiFePO4 | LiFePO4 |
| Expandable | - | Yes, up to 10,000 Wh |
| Output | ||
| AC output | 2,400 W (4,800 W surge) | 3,000 W (6,000 W surge) |
| Boost mode (resistive loads) | 3,400 W | 3,800 W |
| AC outlets | 4 total | 4 total |
| 120V 20A outlets (NEMA 5-20R) | 4 | 4 |
| USB-C ports | 3 (up to 100 W each) | 3 (up to 140 W each) |
| USB-A ports | 1 | 1 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | - | 0 |
| UPS / pass-through | Yes (10 ms switchover) | Yes (10 ms switchover) |
| Charging | ||
| AC charging | 1,800 W | 1,800 W |
| Max solar input | 500 W | 1,000 W |
| Solar input voltage | - | 11-60V, 18A max (2 XT60i inputs) |
| Build | ||
| Weight | 44.8 lb (20.3 kg) | 48.7 lb (22.1 kg) |
| Dimensions | 494 x 239 x 305 mm | 19.4 x 9.5 x 12.0 in |
| App | Wi-Fi + Bluetooth | EcoFlow app (Wi-Fi and Bluetooth) |
| Warranty | 5 years | 5 years |