FOSSiBOT F1800 Preorder
#8 in Mid-sizeFull review
A budget 1kWh LiFePO4 station for camping and short outages, with fast wall charging and strong USB-C ports.
Amazon $399 FOSSiBOT $419$399
The FOSSiBOT F1800 rates 4.4 among mid-size portable power stations; the FOSSiBOT F2400 rates 4.2 among large ones. The FOSSiBOT F1800 costs $180 less ($399 vs $579).
FOSSiBOT F2400
#6 in LargeFull review
A low-cost 2kWh station for home backup and RV use when price per watt-hour matters more than charging speed.
Amazon $579 FOSSiBOT $609$579
Prices were last checked October 24, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different size classes (mid-size and large), and each is scored against the reference points for its own class, so a rating says how well each does among its own size peers. How we rank explains each factor.
| Factor weight | FOSSiBOT F1800 | FOSSiBOT F2400 |
|---|---|---|
| Overall rating | 4.4/5 | 4.2/5 |
| Value 25% | 95 $0.39 per rated Wh | 100 $0.28 per rated Wh |
| Tested capacity 15% | 50 not yet independently tested (neutral score used) | 64 84% of rated capacity delivered (2 tests) |
| Battery life 15% | 100 LiFePO4, 4,000 cycles, 5-year warranty | 100 LiFePO4, 4,000 cycles, 5-year warranty |
| AC output 15% | 82 1,800 W continuous AC | 54 2,400 W continuous AC |
| Charging speed 10% | 91 0-100% on AC in 1 h 8 min | 63 0-100% on AC in 2 h |
| Portability 10% | 84 91 Wh per kg (24.8 lb (11.2 kg)) | 87 93 Wh per kg (48.5 lb (22 kg)) |
| Solar input 5% | 40 500 W max solar input | 11 500 W max solar input |
| Features 5% | 75 UPS (10 ms), 140 W USB-C, app | 75 UPS (8 ms), 100 W USB-C, app |
Independent capacity tests
FOSSiBOT F1800
No independent test published yet.
FOSSiBOT F2400
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| techtest.org | 1,781 Wh | 87% | European 230V model, AC outlets at a 1,200W load (from the review’s capacity chart). Other AC runs: 1,717 Wh at 2,000W and 1,512 Wh at 100W. Full AC recharge took about 2 h 45 min at the 1,100W setting. |
| nextpit | 1,659 Wh | 81% | Full discharge of the European 230V model (load not stated); 2,127 Wh from the wall to recharge, about 78% round trip. |
Specifications
| FOSSiBOT F1800 | FOSSiBOT F2400 | |
|---|---|---|
| Battery | ||
| Rated capacity | 1,024 Wh | 2,048 Wh |
| Tested usable capacity | - | 1,720 Wh (84%) |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 4,000 to 80% | 4,000 to 80%; US spec says 4000+, FOSSiBOT's global spec table says 3500 |
| Expandable | No | No |
| Output | ||
| AC output | 1,800 W (3,600 W surge) | 2,400 W (4,800 W surge) |
| AC outlets | 3 total | 6 total |
| 120V 20A outlets (NEMA 5-20R) | 3 | 6 |
| AC waveform | Pure sine wave | Pure sine wave |
| USB-C ports | 2 (up to 140 W each) | 4 (up to 100 W each) |
| USB-A ports | 1 | 2 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 0 | 2 |
| UPS / pass-through | Yes (10 ms switchover) | Yes (8 ms switchover) |
| Charging | ||
| AC charging | 1,200 W | 1,100 W |
| Full AC charge time | 1 h 8 min | 2 h (Manufacturer: about 2 hours on AC; 1.5 hours with AC + solar (1600W)) |
| Max solar input | 500 W | 500 W |
| Solar input voltage | 12-60V, 15A | - |
| Car charging | 120 W | 100 W |
| Build | ||
| Weight | 24.8 lb (11.2 kg) | 48.5 lb (22 kg) |
| Dimensions | 14.6 x 8.1 x 10.2 in | 15.2 x 11.2 x 12.6 in |
| App | FOSSiBOT app (Wi-Fi/Bluetooth) | FOSSiBOT app |
| Warranty | 5 years | 5 years |
| Released | 2026-07 | 2022-11 |