Anker SOLIX F3800 vs EcoFlow RIVER 2 Pro
Side-by-side on the specs that decide it — surge, capacity, runtime and price.
Both models' specs verified against manufacturer listings · Last updated
The short answer
EcoFlow RIVER 2 Pro costs $3400 less. Whether that gap is worth closing depends on what you need to run.
- Anker SOLIX F3800 holds 400% more energy (3840Wh vs 768Wh), so it runs the same load proportionally longer.
- Anker SOLIX F3800 has 7400W more surge headroom (9000W vs 1600W) — that decides whether a fridge, pump or AC compressor will actually start.
- EcoFlow RIVER 2 Pro is 115.3 lb lighter (17 lb vs 132.3 lb).
- Anker SOLIX F3800 is rated for 4,000 cycles vs 3,000 — meaningful if you cycle it daily.
This is where portable power stops being portable and starts replacing a standby generator. The 240V split-phase output is the headline feature.
Best for: Whole-home backup where you need 240V loads and can't run a gas generator.
Where it falls short:
- 132 lb — this is a wheeled appliance, not something you carry
- $3,999 puts it against real standby generators
The one you actually carry. At 17 lb it is light enough for one hand, yet unlike the true pocket units it has the 800W of output needed to run small appliances rather than just charge devices.
Best for: Backpackers, photographers and festival-goers who care about weight above all.
Where it falls short:
- 800W output limits you to electronics and small loads
- 220W solar input means slow off-grid top-ups
| Spec | Anker SOLIX F3800 | EcoFlow RIVER 2 Pro |
|---|---|---|
| Price | $3999 | $599 |
| Capacity | 3840 Wh | 768 Wh |
| Continuous output | 6000 W | 800 W |
| Surge output | 9000 W | 1600 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 3,000 |
| Weight (lighter wins) | 132.3 lb | 17 lb |
| Max solar | 2400 W | 220 W |
| Recharge time (faster wins) | 1h 30m | 1h 10m |
Runtime head-to-head
| Appliance | Anker SOLIX F3800 | EcoFlow RIVER 2 Pro |
|---|---|---|
| Refrigerator | 54.4 hrs | 10.9 hrs |
| Mini fridge | 103.6 hrs | 20.7 hrs |
| Chest freezer | 40.8 hrs | 8.2 hrs |
| CPAP machine | 81.6 hrs | 16.3 hrs |
| Sump pump | 4.1 hrs | ❌ |