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 is the better portable power station overall, rated 4.2 to 2.6. The FOSSiBOT F2400 leads on value, battery life and AC output. The Generac GB2000 wins on portability. The FOSSiBOT F2400 costs $1,220 less ($579 vs $1,799).
Generac GB2000
#32 in LargeFull review
For Generac owners who want a 2 kWh battery that can parallel with a second unit; most buyers get more capacity, faster charging and longer battery life for less from LiFePO4 rivals.
Toolnut $1,799$1,799
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.
Which should you buy?
- Choose the FOSSiBOT F2400 for value ($0.28 per rated Wh vs $0.85 per rated Wh), battery life (LiFePO4, 4,000 cycles, 5-year warranty vs Li-ion NMC, 1,000 cycles, 3-year warranty) and AC output (2,400 W continuous AC vs 1,600 W continuous AC).
- Choose the Generac GB2000 for portability (108 Wh per kg (43 lb (19.5 kg)) vs 93 Wh per kg (48.5 lb (22 kg))).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every large portable power station; a clear win is highlighted. How we rank explains each one.
| Factor weight | FOSSiBOT F2400 | Generac GB2000 |
|---|---|---|
| Overall rating | 4.2/5 | 2.6/5 |
| Value 25% | 100 $0.28 per rated Wh | 15 $0.85 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 | 24 Li-ion NMC, 1,000 cycles, 3-year warranty |
| AC output 15% | 54 2,400 W continuous AC | 7 1,600 W continuous AC |
| Charging speed 10% | 63 0-100% on AC in 2 h | 50 full AC charge time not published (neutral score used) |
| Portability 10% | 87 93 Wh per kg (48.5 lb (22 kg)) | 100 108 Wh per kg (43 lb (19.5 kg)) |
| Solar input 5% | 11 500 W max solar input | 8 468 W max solar input |
| Features 5% | 75 UPS (8 ms), 100 W USB-C, app | 0 no UPS, expansion or 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. |
Generac GB2000
No independent test published yet.
Specifications
| FOSSiBOT F2400 | Generac GB2000 | |
|---|---|---|
| Battery | ||
| Rated capacity | 2,048 Wh | 2,106 Wh |
| Tested usable capacity | 1,720 Wh (84%) | - |
| Chemistry | LiFePO4 | Li-ion NMC |
| Cycle life | 4,000 to 80%; US spec says 4000+, FOSSiBOT's global spec table says 3500 | 1,000 to 80% (0.5C charge, 1C discharge at 25 C) |
| Expandable | No | No |
| Output | ||
| AC output | 2,400 W (4,800 W surge) | 1,600 W (3,200 W surge) |
| AC outlets | 6 total | 3 total |
| 120V 20A outlets (NEMA 5-20R) | 6 | - |
| 120V 2-prong outlets (NEMA 1-15R) | - | 3 |
| AC waveform | Pure sine wave | - |
| USB-C ports | 4 (up to 100 W each) | 2 (up to 65 W each) |
| USB-A ports | 2 | 2 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 2 | 0 |
| UPS / pass-through | Yes (8 ms switchover) | No |
| Charging | ||
| AC charging | 1,100 W | 450 W |
| Full AC charge time | 2 h (Manufacturer: about 2 hours on AC; 1.5 hours with AC + solar (1600W)) | - |
| Max solar input | 500 W | 468 W |
| Solar input voltage | - | 10-28V, 30A max (shared DC/solar input) |
| Car charging | 100 W | - |
| Build | ||
| Weight | 48.5 lb (22 kg) | 43 lb (19.5 kg) |
| Dimensions | 15.2 x 11.2 x 12.6 in | 16.8 x 10.4 x 15.1 in |
| App | FOSSiBOT app | - |
| Warranty | 5 years | 3 years |
| Released | 2022-11 | 2022-09 |