Anker SOLIX F3800 vs EcoFlow RIVER 2
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 costs $3800 less. Whether that gap is worth closing depends on what you need to run.
- Anker SOLIX F3800 holds 1400% more energy (3840Wh vs 256Wh), so it runs the same load proportionally longer.
- Anker SOLIX F3800 has 8400W more surge headroom (9000W vs 600W) — that decides whether a fridge, pump or AC compressor will actually start.
- EcoFlow RIVER 2 is 124.6 lb lighter (7.7 lb vs 132.3 lb).
- Anker SOLIX F3800 is rated for 4,000 cycles vs 3,000 — meaningful if you cycle it daily.
Anker SOLIX F3800
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
EcoFlow RIVER 2
The cheapest way into LiFePO4. 256Wh is a device charger, but at under $200 with a 60-minute recharge it's hard to argue with.
Best for: Budget campers who just need to keep phones, cameras and a laptop alive.
Where it falls short:
- 300W output runs devices only
- 256Wh is a single evening of real use
| Spec | Anker SOLIX F3800 | EcoFlow RIVER 2 |
|---|---|---|
| Price | $3999 | $199 |
| Capacity | 3840 Wh | 256 Wh |
| Continuous output | 6000 W | 300 W |
| Surge output | 9000 W | 600 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 3,000 |
| Weight (lighter wins) | 132.3 lb | 7.7 lb |
| Max solar | 2400 W | 110 W |
| Recharge time (faster wins) | 1h 30m | 1h |
Runtime head-to-head
| Appliance | Anker SOLIX F3800 | EcoFlow RIVER 2 |
|---|---|---|
| Refrigerator | 54.4 hrs | ❌ |
| Mini fridge | 103.6 hrs | 6.9 hrs |
| Chest freezer | 40.8 hrs | ❌ |
| CPAP machine | 81.6 hrs | 5.4 hrs |
| Sump pump | 4.1 hrs | ❌ |