Anker SOLIX F3800 vs EcoFlow RIVER 2 Max
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 Max costs $3700 less. Whether that gap is worth closing depends on what you need to run.
- Anker SOLIX F3800 holds 650% more energy (3840Wh vs 512Wh), so it runs the same load proportionally longer.
- Anker SOLIX F3800 has 8000W more surge headroom (9000W vs 1000W) — that decides whether a fridge, pump or AC compressor will actually start.
- EcoFlow RIVER 2 Max is 119.1 lb lighter (13.2 lb vs 132.3 lb).
- Anker SOLIX F3800 is rated for 4,000 cycles vs 3,000 — meaningful if you cycle it daily.
The Anker SOLIX F3800 is poor value on paper: 0.96 Wh per dollar versus 1.71 for the EcoFlow RIVER 2 Max. Only worth it if you specifically need its higher output or 240V capability — otherwise you're paying a large premium per watt-hour.
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
Double the River 2's capacity and output for $100 more. The sweet spot of EcoFlow's small line for anyone eyeing the occasional small appliance.
Best for: Campers who want headroom over a pure device charger without the size of a 1kWh unit.
Where it falls short:
- Still not enough output for heaters or compressors
- 220W solar input is modest
| Spec | Anker SOLIX F3800 | EcoFlow RIVER 2 Max |
|---|---|---|
| Price | $3999 | $299 |
| Capacity | 3840 Wh | 512 Wh |
| Continuous output | 6000 W | 500 W |
| Surge output | 9000 W | 1000 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 3,000 |
| Weight (lighter wins) | 132.3 lb | 13.2 lb |
| Max solar | 2400 W | 220 W |
| Recharge time (faster wins) | 1h 30m | 1h |
Runtime head-to-head
| Appliance | Anker SOLIX F3800 | EcoFlow RIVER 2 Max |
|---|---|---|
| Refrigerator | 54.4 hrs | 7.3 hrs |
| Mini fridge | 103.6 hrs | 13.8 hrs |
| Chest freezer | 40.8 hrs | 5.4 hrs |
| CPAP machine | 81.6 hrs | 10.9 hrs |
| Sump pump | 4.1 hrs | ❌ |