EcoFlow DELTA Pro Ultra
#13 in Home backupFull review
A modular 6kWh home-backup system for buyers who need 240V output and plan to expand. Overkill for camping or short outages.
Amazon $4,199 EcoFlow $4,199$4,199
The EcoFlow DELTA Pro Ultra is the better portable power station overall, rated 3.8 to 3.7. The EcoFlow DELTA Pro Ultra leads on AC output, portability and solar input. The Anker SOLIX F3800 wins on value. The Anker SOLIX F3800 costs $1,999.01 less ($2,199.99 vs $4,199).
Anker SOLIX F3800
#22 in Home backupFull review
For homeowners who want 240V backup that can grow into a whole-home battery, and who do not need the extra solar input of the F3800 Plus.
Amazon Anker $2,199.99$2,199.99
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 Pro Ultra for AC output (7,200 W continuous AC vs 6,000 W continuous AC), portability (75 Wh per kg (181.8 lb (82.4 kg)) vs 64 Wh per kg (132.3 lb (60 kg))) and solar input (5,600 W max solar input vs 2,400 W max solar input).
- Choose the Anker SOLIX F3800 for value ($0.57 per rated Wh vs $0.68 per rated Wh).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every home backup portable power station; a clear win is highlighted. How we rank explains each one.
| Factor weight | EcoFlow DELTA Pro Ultra | Anker SOLIX F3800 |
|---|---|---|
| Overall rating | 3.8/5 | 3.7/5 |
| Value 25% | 41 $0.68 per rated Wh | 58 $0.57 per rated Wh |
| Tested capacity 15% | 50 not yet independently tested (neutral score used) | 35 78% of rated capacity delivered (1 test) |
| Battery life 15% | 96 LiFePO4, 3,500 cycles, 5-year warranty | 91 LiFePO4, 3,000 cycles, 5-year warranty |
| AC output 15% | 100 7,200 W continuous AC | 83 6,000 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% | 54 75 Wh per kg (181.8 lb (82.4 kg)) | 35 64 Wh per kg (132.3 lb (60 kg)) |
| Solar input 5% | 90 5,600 W max solar input | 56 2,400 W max solar input |
| Features 5% | 100 UPS (0 ms), expandable, 100 W USB-C, app | 100 UPS (20 ms), expandable, 100 W USB-C, app |
Independent capacity tests
EcoFlow DELTA Pro Ultra
No independent test published yet.
Anker SOLIX F3800
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| StorageReview | 2,980 Wh | 78% | Full discharge until the inverter cut off; load not stated. Recharge from 0 to 100% took 4,930 Wh from the wall. |
Specifications
| EcoFlow DELTA Pro Ultra | Anker SOLIX F3800 | |
|---|---|---|
| Battery | ||
| Rated capacity | 6,144 Wh | 3,840 Wh |
| Tested usable capacity | - | 2,980 Wh (78%) |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 3,500 to 80% | 3,000 to 80% |
| Expandable | Yes, up to 30,000 Wh | Yes, up to 26,880 Wh |
| Output | ||
| AC output | 7,200 W (10,800 W surge) | 6,000 W (9,000 W surge) |
| AC outlets | 6 total | 8 total |
| 120V 20A outlets (NEMA 5-20R) | 4 | 6 |
| RV 30A outlet (TT-30R) | 1 | - |
| 120/240V 30A twist-lock (NEMA L14-30R) | 1 | 1 |
| 120/240V 50A outlet (NEMA 14-50R) | - | 1 |
| AC waveform | Pure sine wave, 120/240V split phase | - |
| USB-C ports | 2 (up to 100 W each) | 3 (up to 100 W each) |
| USB-A ports | 2 | 2 |
| 12 V car outlet | - | Yes |
| UPS / pass-through | Yes (0 ms switchover) | Yes (20 ms switchover) |
| Charging | ||
| AC charging | - | 1,800 W |
| Max solar input | 5,600 W | 2,400 W |
| Solar input voltage | High-voltage 80-450V (4000W) and low-voltage 30-150V (1600W) | 11-60V, 2 inputs at 1200W each |
| Build | ||
| Weight | 181.8 lb (82.4 kg) | 132.3 lb (60 kg) |
| Dimensions | Inverter 27.2 x 18.9 x 8.4 in; battery 26 x 18 x 8 in | 27.6 x 15.3 x 15.6 in |
| App | EcoFlow app (Bluetooth, Wi-Fi and 4G) | Anker app |
| Warranty | 5 years | 5 years |