The EcoFlow DELTA Pro is the better portable power station overall, rated 3.7 to 3.6. The EcoFlow DELTA Pro leads on value and portability. The Anker SOLIX F3800 Plus wins on AC output, solar input and features. The EcoFlow DELTA Pro costs $800.99 less ($1,799 vs $2,599.99).
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 $1,799For homeowners planning a solar-backed, expandable 240V backup system rather than a portable unit.
Anker $2,599.99Prices 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.
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 | Anker SOLIX F3800 Plus |
|---|---|---|
| Overall rating | 3.7/5 | 3.6/5 |
| Value 25% | 69 $0.50 per rated Wh | 42 $0.68 per rated Wh |
| Tested capacity 15% | 66 84% of rated capacity delivered (2 tests) | 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% | 37 3,600 W continuous AC | 83 6,000 W continuous AC |
| Charging speed 10% | 41 0-100% on AC in 2 h 42 min | 50 full AC charge time not published (neutral score used) |
| Portability 10% | 64 80 Wh per kg (99 lb (45 kg)) | 31 62 Wh per kg (136.7 lb (62 kg)) |
| Solar input 5% | 35 1,600 W max solar input | 80 3,200 W max solar input |
| Features 5% | 65 expandable, 100 W USB-C, app | 80 UPS (20 ms), expandable, 100 W USB-C |
| 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. |
No independent test published yet.
| EcoFlow DELTA Pro | Anker SOLIX F3800 Plus | |
|---|---|---|
| Battery | ||
| Rated capacity | 3,600 Wh | 3,840 Wh |
| Tested usable capacity | 3,042 Wh (84%) | - |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 3,500 to 80% (6,500 to 50%) | 3,000 |
| Expandable | Yes, up to 25,000 Wh | Yes, up to 53,800 Wh |
| Output | ||
| AC output | 3,600 W (7,200 W surge) | 6,000 W |
| Boost mode (resistive loads) | 4,500 W | - |
| AC outlets | 5 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 |
| AC waveform | Pure sine wave | - |
| USB-C ports | 2 (up to 100 W each) | 3 (up to 100 W each) |
| USB-A ports | 4 | 2 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 2 | - |
| UPS / pass-through | - | Yes (20 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 | 1,600 W | 3,200 W |
| Solar input voltage | 11-150V, 15A | 11-165V, 2 inputs at 1600W each |
| Car charging | 96 W | - |
| Build | ||
| Weight | 99 lb (45 kg) | 136.7 lb (62 kg) |
| Dimensions | 25 x 11.2 x 16.4 in | 27.6 x 15.3 x 15.6 in |
| App | EcoFlow app (Wi-Fi and Bluetooth) | - |
| Warranty | 5 years | 5 years |
| Released | 2021 | 2025-03 |
