Bluetti AC50B vs Fossibot F800
What is the difference?
The Bluetti AC50B has 700 W of power, 1 kW peak, a 448 Wh battery. The Fossibot F800 has 800 W of power, 840 W peak, a 512 Wh battery.
Both use LiFePO4 batteries.
The Bluetti AC50B is rated at 45 dB, the Fossibot F800 is rated at 50 dB. The Bluetti AC50B is quieter.
Both have a 5-year warranty.
The Bluetti AC50B can add extra batteries.
Specs side by side
| Bluetti AC50B | Fossibot F800 | |
|---|---|---|
| Capacity (Wh) | 448 | 512 |
| Continuous (W) | 700 | 800 |
| Peak (W) | 1000 | 840 |
| Solar input (W) | — | 200 |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycles | — | 3500 |
| Expandable | yes | — |
| Weight (lb) | — | — |
| Warranty (yr) | 5 | 5 |
| Fridge run time | 8.4 h | 9.7 h |
| CPAP run time | 10.1 h | 11.6 h |
| Wi-Fi router run time | 29.6 h | 33.8 h |
| Check on Amazon → | Check on Amazon → |
Specs as read from manufacturer pages on 2026-10-29 / 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 has more capacity, Bluetti AC50B or Fossibot F800?
The Fossibot F800. More capacity: 512 Wh vs 448 Wh.
Which is quieter, Bluetti AC50B or Fossibot F800?
The Bluetti AC50B. Quieter: 45 dB vs 50 dB.
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Compare other models → · All Bluetti models · All Fossibot models