EcoFlow RIVER 2 Max vs Fossibot F800
What is the difference?
The EcoFlow RIVER 2 Max has 500 W of power, 1 kW peak, a 512 Wh battery. The Fossibot F800 has 800 W of power, 840 W peak, a 512 Wh battery.
Both use LiFePO4 batteries.
The EcoFlow RIVER 2 Max is rated for 3000 cycles, the Fossibot F800 is rated for 3500 cycles.
The EcoFlow RIVER 2 Max takes up to 220 W from solar, the Fossibot F800 takes up to 200 W from solar. The EcoFlow RIVER 2 Max charges faster from panels.
Both have a 5-year warranty.
Both have 120 V AC output.
Specs side by side
| EcoFlow RIVER 2 Max | Fossibot F800 | |
|---|---|---|
| Capacity (Wh) | 512 | 512 |
| Continuous (W) | 500 | 800 |
| Peak (W) | 1000 | 840 |
| Solar input (W) | 220 | 200 |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycles | 3000 | 3500 |
| Expandable | — | — |
| Weight (lb) | 13 | — |
| Warranty (yr) | 5 | 5 |
| Fridge run time | 9.7 h | 9.7 h |
| CPAP run time | 11.6 h | 11.6 h |
| Wi-Fi router run time | 33.8 h | 33.8 h |
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Specs as read from manufacturer pages on 2026-10-31 / 2026-10-30. Specs one maker does not list are left out of the comparison. Run times are for that appliance alone with a typical duty cycle, after inverter and depth-of-discharge losses. Sponsored links; we may earn a commission.
Common questions
Which charges faster from solar, EcoFlow RIVER 2 Max or Fossibot F800?
The EcoFlow RIVER 2 Max. Faster solar charging: 220 W input vs 200 W input.
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Compare other models → · All EcoFlow models · All Fossibot models