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 4.1. The FOSSiBOT F2400 leads on AC output. The Anker SOLIX S2000 wins on tested capacity and portability. The FOSSiBOT F2400 costs $120.99 less ($579 vs $699.99).
Anker SOLIX S2000
#12 in LargeFull review
For home backup of a fridge, router and small appliances where a compact, long-lived battery matters more than high output or solar charging speed.
Amazon $699.99 Anker SOLIX $699.99$699.99
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 AC output (2,400 W continuous AC vs 1,500 W continuous AC).
- Choose the Anker SOLIX S2000 for tested capacity (91% of rated capacity delivered (1 test) vs 84% of rated capacity delivered (2 tests)) and portability (124 Wh per kg (35.7 lb (16.2 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 | Anker SOLIX S2000 |
|---|---|---|
| Overall rating | 4.2/5 | 4.1/5 |
| Value 25% | 100 $0.28 per rated Wh | 93 $0.35 per rated Wh |
| Tested capacity 15% | 64 84% of rated capacity delivered (2 tests) | 95 91% of rated capacity delivered (1 test) |
| Battery life 15% | 100 LiFePO4, 4,000 cycles, 5-year warranty | 100 LiFePO4, 6,000 cycles, 5-year warranty |
| AC output 15% | 54 2,400 W continuous AC | 0 1,500 W continuous AC |
| Charging speed 10% | 63 0-100% on AC in 2 h | 70 0-100% on AC in 1 h 47 min |
| Portability 10% | 87 93 Wh per kg (48.5 lb (22 kg)) | 100 124 Wh per kg (35.7 lb (16.2 kg)) |
| Solar input 5% | 11 500 W max solar input | 6 400 W max solar input |
| Features 5% | 75 UPS (8 ms), 100 W USB-C, app | 75 UPS (10 ms), 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. |
Anker SOLIX S2000
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| The Solar Lab | - | 91% | Efficiency test; load not specified in the review. Measured AC recharge 1 h 47 min. |
Specifications
| FOSSiBOT F2400 | Anker SOLIX S2000 | |
|---|---|---|
| Battery | ||
| Rated capacity | 2,048 Wh | 2,010 Wh |
| Tested usable capacity | 1,720 Wh (84%) | 1,829 Wh (91%) |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 4,000 to 80%; US spec says 4000+, FOSSiBOT's global spec table says 3500 | 6,000 to 80% (10,000 to 60%) |
| Expandable | No | No |
| Output | ||
| AC output | 2,400 W (4,800 W surge) | 1,500 W (3,000 W surge) |
| AC outlets | 6 total | 5 total |
| 120V 15A outlets (NEMA 5-15R) | - | 5 |
| 120V 20A outlets (NEMA 5-20R) | 6 | - |
| AC waveform | Pure sine wave | Pure sine wave |
| USB-C ports | 4 (up to 100 W each) | 2 (up to 100 W each) |
| USB-A ports | 2 | 1 |
| 12 V car outlet | Yes | No |
| DC5521 ports | 2 | 0 |
| UPS / pass-through | Yes (8 ms switchover) | Yes (10 ms switchover) |
| Charging | ||
| AC charging | 1,100 W | 1,600 W |
| Full AC charge time | 2 h (Manufacturer: about 2 hours on AC; 1.5 hours with AC + solar (1600W)) | 1 h 47 min (measured by The Solar Lab; Anker states 2.3 h at the default 1,150W, UltraFast (1,600W) is enabled in the app) |
| Max solar input | 500 W | 400 W |
| Solar input voltage | - | 11-60V |
| Car charging | 100 W | - |
| Build | ||
| Weight | 48.5 lb (22 kg) | 35.7 lb (16.2 kg) |
| Dimensions | 15.2 x 11.2 x 12.6 in | 8.2 x 11.1 x 12.7 in |
| App | FOSSiBOT app | Anker app |
| Warranty | 5 years | 5 years |
| Released | 2022-11 | 2026-05 |