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
The FOSSiBOT F2400 rates 4.2 among large portable power stations; the FOSSiBOT F3600 Pro rates 4.0 among home backup ones. The FOSSiBOT F2400 costs $560 less ($579 vs $1,139).
FOSSiBOT F3600 Pro
#7 in Home backupFull review
A large home-backup station for buyers who want lots of capacity and solar input at a low price per watt-hour, and don’t need to move it often.
Amazon $1,139 FOSSiBOT $1,219$1,139
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 (large and home backup), 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 F2400 | FOSSiBOT F3600 Pro |
|---|---|---|
| Overall rating | 4.2/5 | 4.0/5 |
| Value 25% | 100 $0.28 per rated Wh | 100 $0.30 per rated Wh |
| Tested capacity 15% | 64 84% of rated capacity delivered (2 tests) | 50 not yet independently tested (neutral score used) |
| Battery life 15% | 100 LiFePO4, 4,000 cycles, 5-year warranty | 100 LiFePO4, 6,500 cycles, 5-year warranty |
| AC output 15% | 54 2,400 W continuous AC | 37 3,600 W continuous AC |
| Charging speed 10% | 63 0-100% on AC in 2 h | 32 0-100% on AC in 3 h |
| Portability 10% | 87 93 Wh per kg (48.5 lb (22 kg)) | 84 91 Wh per kg (92.6 lb (42 kg)) |
| Solar input 5% | 11 500 W max solar input | 44 2,000 W max solar input |
| Features 5% | 75 UPS (8 ms), 100 W USB-C, app | 100 UPS (10 ms), expandable, 100 W USB-C, app |
Independent capacity tests
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. |
FOSSiBOT F3600 Pro
No independent test published yet.
Specifications
| FOSSiBOT F2400 | FOSSiBOT F3600 Pro | |
|---|---|---|
| Battery | ||
| Rated capacity | 2,048 Wh | 3,840 Wh |
| Tested usable capacity | 1,720 Wh (84%) | - |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 4,000 to 80%; US spec says 4000+, FOSSiBOT's global spec table says 3500 | 6,500 to 80% per product description and Amazon; US spec table says to 50% |
| Expandable | No | Yes, up to 11,520 Wh |
| Output | ||
| AC output | 2,400 W (4,800 W surge) | 3,600 W (7,200 W surge) |
| AC outlets | 6 total | 5 total |
| 120V 20A outlets (NEMA 5-20R) | 6 | 4 |
| RV 30A outlet (TT-30R) | - | 1 |
| AC waveform | Pure sine wave | Pure sine wave |
| USB-C ports | 4 (up to 100 W each) | 4 (up to 100 W each) |
| USB-A ports | 2 | 2 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 2 | 2 |
| UPS / pass-through | Yes (8 ms switchover) | Yes (10 ms switchover) |
| Charging | ||
| AC charging | 1,100 W | 1,500 W |
| Full AC charge time | 2 h (Manufacturer: about 2 hours on AC; 1.5 hours with AC + solar (1600W)) | 3 h (Manufacturer: about 3 hours on AC; 1 h 50 min with AC + solar (3500W)) |
| Max solar input | 500 W | 2,000 W |
| Solar input voltage | - | 12-160V, 20A |
| Car charging | 100 W | 120 W |
| Build | ||
| Weight | 48.5 lb (22 kg) | 92.6 lb (42 kg) |
| Dimensions | 15.2 x 11.2 x 12.6 in | 24.0 x 12.6 x 18.7 in |
| App | FOSSiBOT app | FOSSiBOT app |
| Warranty | 5 years | 5 years |
| Released | 2022-11 | 2024-07 |