FOSSiBOT F3600 Pro
#6 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 battery life, AC output and value. The BLUETTI Elite 400 wins on charging speed and portability. The FOSSiBOT F3600 Pro costs $260 less ($1,139 vs $1,399).
BLUETTI Elite 400
#25 in Home backupFull review
For home-backup buyers who want nearly 4 kWh in one rolling unit without adding expansion batteries.
Amazon $1,449 BLUETTI $1,399$1,399
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 F3600 Pro for battery life (LiFePO4, 6,500 cycles, 5-year warranty vs LiFePO4, 5-year warranty), AC output (3,600 W continuous AC vs 2,600 W continuous AC) and value ($0.30 per rated Wh vs $0.36 per rated Wh).
- Choose the BLUETTI Elite 400 for charging speed (0-100% on AC in 2 h 30 min vs 0-100% on AC in 3 h) and portability (98 Wh per kg (86 lb (39 kg)) vs 91 Wh per kg (92.6 lb (42 kg))).
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 | BLUETTI Elite 400 |
|---|---|---|
| Overall rating | 4.0/5 | 3.6/5 |
| Value 25% | 100 $0.30 per rated Wh | 90 $0.36 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 | 70 LiFePO4, 5-year warranty |
| AC output 15% | 37 3,600 W continuous AC | 7 2,600 W continuous AC |
| Charging speed 10% | 32 0-100% on AC in 3 h | 47 0-100% on AC in 2 h 30 min |
| Portability 10% | 84 91 Wh per kg (92.6 lb (42 kg)) | 97 98 Wh per kg (86 lb (39 kg)) |
| Solar input 5% | 44 2,000 W max solar input | 13 1,000 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 | BLUETTI Elite 400 | |
|---|---|---|
| Battery | ||
| Rated capacity | 3,840 Wh | 3,840 Wh |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 6,500 to 80% per product description and Amazon; US spec table says to 50% | - |
| Expandable | Yes, up to 11,520 Wh | No |
| Output | ||
| AC output | 3,600 W (7,200 W surge) | 2,600 W (5,200 W surge) |
| Boost mode (resistive loads) | - | 3,900 W |
| AC outlets | 5 total | 4 total |
| 120V 20A outlets (NEMA 5-20R) | 4 | 4 |
| RV 30A outlet (TT-30R) | 1 | - |
| AC waveform | Pure sine wave | - |
| USB-C ports | 4 (up to 100 W each) | 2 (up to 100 W each) |
| USB-A ports | 2 | 2 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 2 | - |
| UPS / pass-through | Yes (10 ms switchover) | Yes (15 ms switchover) |
| Charging | ||
| AC charging | 1,500 W | 1,800 W |
| Full AC charge time | 3 h (Manufacturer: about 3 hours on AC; 1 h 50 min with AC + solar (3500W)) | 2 h 30 min (0-80% in about 1 h 55 min in Turbo mode; AC + solar up to 2800W) |
| Max solar input | 2,000 W | 1,000 W |
| Solar input voltage | 12-160V, 20A | 12-60V, 20A |
| Car charging | 120 W | - |
| Build | ||
| Weight | 92.6 lb (42 kg) | 86 lb (39 kg) |
| Dimensions | 24.0 x 12.6 x 18.7 in | 16.8 x 11.3 x 19.3 in |
| App | FOSSiBOT app | Wi-Fi + Bluetooth |
| Warranty | 5 years | 5 years |