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
The FOSSiBOT F3600 Pro is the better portable power station overall, rated 4.0 to 3.6. The FOSSiBOT F3600 Pro leads on value, portability and features. The FOSSiBOT F3600 Pro costs $760 less ($1,139 vs $1,899).
ALLPOWERS R4000
#25 in Home backupFull review
A wheeled 3.5 kWh LiFePO4 station for RVs, food trucks and home backup at a lower price than the big brands. It is 120V only.
ALLPOWERS $1,899$1,899
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 F3600 Pro for value ($0.30 per rated Wh vs $0.55 per rated Wh), portability (91 Wh per kg (92.6 lb (42 kg)) vs 77 Wh per kg (99.2 lb (45 kg))) and features (UPS (10 ms), expandable, 100 W USB-C, app vs UPS (15 ms), 100 W USB-C, app).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every home backup portable power station; a clear win is highlighted. How we rank explains each one.
| Factor weight | FOSSiBOT F3600 Pro | ALLPOWERS R4000 |
|---|---|---|
| Overall rating | 4.0/5 | 3.6/5 |
| Value 25% | 100 $0.30 per rated Wh | 62 $0.55 per rated Wh |
| Tested capacity 15% | 50 not yet independently tested (neutral score used) | 50 not yet independently tested (neutral score used) |
| Battery life 15% | 100 LiFePO4, 6,500 cycles, 5-year warranty | 96 LiFePO4, 3,500 cycles, 5-year warranty |
| AC output 15% | 37 3,600 W continuous AC | 37 3,600 W continuous AC |
| Charging speed 10% | 32 0-100% on AC in 3 h | 50 full AC charge time not published (neutral score used) |
| Portability 10% | 84 91 Wh per kg (92.6 lb (42 kg)) | 58 77 Wh per kg (99.2 lb (45 kg)) |
| Solar input 5% | 44 2,000 W max solar input | 50 2,000 W max solar input |
| Features 5% | 100 UPS (10 ms), expandable, 100 W USB-C, app | 75 UPS (15 ms), 100 W USB-C, app |
Specifications
| FOSSiBOT F3600 Pro | ALLPOWERS R4000 | |
|---|---|---|
| Battery | ||
| Rated capacity | 3,840 Wh | 3,456 Wh |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 6,500 to 80% per product description and Amazon; US spec table says to 50% | 3,500 to 80% |
| Expandable | Yes, up to 11,520 Wh | - |
| Output | ||
| AC output | 3,600 W (7,200 W surge) | 3,600 W (6,000 W surge) |
| AC outlets | 5 total | 5 total |
| 120V 20A outlets (NEMA 5-20R) | 4 | 4 |
| RV 30A outlet (TT-30R) | 1 | 1 |
| 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 | 4 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 2 | 0 |
| UPS / pass-through | Yes (10 ms switchover) | Yes (15 ms switchover) |
| Charging | ||
| AC charging | 1,500 W | 1,500 W |
| Full AC charge time | 3 h (Manufacturer: about 3 hours on AC; 1 h 50 min with AC + solar (3500W)) | - |
| Max solar input | 2,000 W | 2,000 W |
| Solar input voltage | 12-160V, 20A | 12-150V MPPT, 40A |
| Car charging | 120 W | - |
| Build | ||
| Weight | 92.6 lb (42 kg) | 99.2 lb (45 kg) |
| Dimensions | 24.0 x 12.6 x 18.7 in | 21.25 x 19.29 x 11.81 in |
| App | FOSSiBOT app | ALLPOWERS app (Wi-Fi/Bluetooth) |
| Warranty | 5 years | 5 years |
| Released | 2024-07 | 2022-12 |