FOSSiBOT F1800
#4 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 is the better portable power station overall, rated 4.4 to 4.1. The FOSSiBOT F1800 leads on value and portability. The OUPES Mega 1 wins on solar input and features. The FOSSiBOT F1800 costs $67.65 less ($399 vs $466.65).
OUPES Mega 1
#14 in Mid-sizeFull review
A strong 1kWh home-backup station with a big inverter and room to expand, often sold well below list price on Amazon.
Amazon $466.65 OUPES $699$466.65
Prices were last checked October 20, 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 F1800 for value ($0.39 per rated Wh vs $0.46 per rated Wh) and portability (91 Wh per kg (24.8 lb (11.2 kg)) vs 81 Wh per kg (27.8 lb (12.6 kg))).
- Choose the OUPES Mega 1 for solar input (800 W max solar input vs 500 W max solar input) and features (UPS (20 ms), expandable, 100 W USB-C, app vs UPS (10 ms), 140 W USB-C, app).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every mid-size portable power station; a clear win is highlighted. How we rank explains each one.
| Factor weight | FOSSiBOT F1800 | OUPES Mega 1 |
|---|---|---|
| Overall rating | 4.4/5 | 4.1/5 |
| Value 25% | 95 $0.39 per rated Wh | 86 $0.46 per rated Wh |
| Tested capacity 15% | 50 not yet independently tested (neutral score used) | 41 79% of rated capacity delivered (1 test) |
| Battery life 15% | 100 LiFePO4, 4,000 cycles, 5-year warranty | 96 LiFePO4, 3,500 cycles, 5-year warranty |
| AC output 15% | 82 1,800 W continuous AC | 88 2,000 W continuous AC |
| Charging speed 10% | 91 0-100% on AC in 1 h 8 min | 50 full AC charge time not published (neutral score used) |
| Portability 10% | 84 91 Wh per kg (24.8 lb (11.2 kg)) | 66 81 Wh per kg (27.8 lb (12.6 kg)) |
| Solar input 5% | 40 500 W max solar input | 74 800 W max solar input |
| Features 5% | 75 UPS (10 ms), 140 W USB-C, app | 100 UPS (20 ms), expandable, 100 W USB-C, app |
Independent capacity tests
FOSSiBOT F1800
No independent test published yet.
OUPES Mega 1
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| The Solar Lab | - | 79% | 1,779W appliance load ran for 27 minutes. |
Specifications
| FOSSiBOT F1800 | OUPES Mega 1 | |
|---|---|---|
| Battery | ||
| Rated capacity | 1,024 Wh | 1,024 Wh |
| Tested usable capacity | - | 809 Wh (79%) |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 4,000 to 80% | 3,500 to 80% |
| Expandable | No | Yes, up to 5,120 Wh |
| Output | ||
| AC output | 1,800 W (3,600 W surge) | 2,000 W (4,500 W surge) |
| AC outlets | 3 total | 4 total |
| 120V 20A outlets (NEMA 5-20R) | 3 | 4 |
| AC waveform | Pure sine wave | - |
| USB-C ports | 2 (up to 140 W each) | 2 (up to 100 W each) |
| USB-A ports | 1 | 4 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | - | 2 |
| UPS / pass-through | Yes (10 ms switchover) | Yes (20 ms switchover) |
| Charging | ||
| AC charging | 1,200 W | 1,400 W |
| Full AC charge time | 1 h 8 min | - |
| Max solar input | 500 W | 800 W |
| Solar input voltage | 12-60V, 15A | 12-78V (MPPT 18-75V, 14A) |
| Car charging | 120 W | - |
| Build | ||
| Weight | 24.8 lb (11.2 kg) | 27.8 lb (12.6 kg) |
| Dimensions | 14.6 x 8.1 x 10.2 in | 15.1 x 9.1 x 11.6 in |
| App | FOSSiBOT app (Wi-Fi/Bluetooth) | OUPES app (Wi-Fi/Bluetooth) |
| Warranty | 5 years | 5 years |