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 3.6. The EcoFlow DELTA Pro Ultra leads on AC output, portability and features. The Anker SOLIX F3800 Plus costs $1,599.01 less ($2,599.99 vs $4,199).
Anker SOLIX F3800 Plus
#26 in Home backupFull review
For homeowners planning a solar-backed, expandable 240V backup system rather than a portable unit.
Anker $2,599.99$2,599.99
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 62 Wh per kg (136.7 lb (62 kg))) and features (UPS (0 ms), expandable, 100 W USB-C, app vs UPS (20 ms), expandable, 100 W USB-C).
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 Plus |
|---|---|---|
| Overall rating | 3.8/5 | 3.6/5 |
| Value 25% | 41 $0.68 per rated Wh | 42 $0.68 per rated Wh |
| Tested capacity 15% | 50 not yet independently tested (neutral score used) | 50 not yet independently tested (neutral score used) |
| 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)) | 31 62 Wh per kg (136.7 lb (62 kg)) |
| Solar input 5% | 90 5,600 W max solar input | 80 3,200 W max solar input |
| Features 5% | 100 UPS (0 ms), expandable, 100 W USB-C, app | 80 UPS (20 ms), expandable, 100 W USB-C |
Specifications
| EcoFlow DELTA Pro Ultra | Anker SOLIX F3800 Plus | |
|---|---|---|
| Battery | ||
| Rated capacity | 6,144 Wh | 3,840 Wh |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 3,500 to 80% | 3,000 |
| Expandable | Yes, up to 30,000 Wh | Yes, up to 53,800 Wh |
| Output | ||
| AC output | 7,200 W (10,800 W surge) | 6,000 W |
| AC outlets | 6 total | 8 total |
| 120V 20A outlets (NEMA 5-20R) | 4 | 6 |
| RV 30A outlet (TT-30R) | 1 | 1 |
| 120/240V 30A twist-lock (NEMA L14-30R) | 1 | 1 |
| AC waveform | Pure sine wave, 120/240V split phase | - |
| USB-C ports | 2 (up to 100 W each) | - |
| USB-A ports | 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 | 3,200 W |
| Solar input voltage | High-voltage 80-450V (4000W) and low-voltage 30-150V (1600W) | 11-165V, 2 inputs at 1600W each |
| Build | ||
| Weight | 181.8 lb (82.4 kg) | 136.7 lb (62 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) | - |
| Warranty | 5 years | 5 years |