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 3.9. The FOSSiBOT F3600 Pro leads on portability. The FOSSiBOT F3600 Pro costs $59.98 less ($1,139 vs $1,198.98).
Growatt HELIOS 3600
#11 in Home backupFull review
A 3.7 kWh home backup station for buyers who want 240V from one unit and the option to grow toward whole-home backup. At the Amazon price it is one of the cheaper ways to get that much LiFePO4 capacity.
Amazon $1,198.98$1,198.98
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 portability (91 Wh per kg (92.6 lb (42 kg)) vs 82 Wh per kg (99 lb (45 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 | Growatt HELIOS 3600 |
|---|---|---|
| Overall rating | 4.0/5 | 3.9/5 |
| Value 25% | 100 $0.30 per rated Wh | 96 $0.33 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 | 100 LiFePO4, 4,000 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 | 32 0-100% on AC in 3 h |
| Portability 10% | 84 91 Wh per kg (92.6 lb (42 kg)) | 67 82 Wh per kg (99 lb (45 kg)) |
| Solar input 5% | 44 2,000 W max solar input | 46 2,000 W max solar input |
| Features 5% | 100 UPS (10 ms), expandable, 100 W USB-C, app | 100 UPS (20 ms), expandable, 100 W USB-C, app |
Specifications
| FOSSiBOT F3600 Pro | Growatt HELIOS 3600 | |
|---|---|---|
| Battery | ||
| Rated capacity | 3,840 Wh | 3,686 Wh |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 6,500 to 80% per product description and Amazon; US spec table says to 50% | 4,000 4000+ cycles; end-of-life capacity not stated |
| Expandable | Yes, up to 11,520 Wh | Yes |
| Output | ||
| AC output | 3,600 W (7,200 W surge) | 3,600 W |
| Boost mode (resistive loads) | - | 4,500 W |
| AC outlets | 5 total | 6 total |
| 120V 20A outlets (NEMA 5-20R) | 4 | 4 |
| RV 30A outlet (TT-30R) | 1 | 1 |
| 240V 20A outlet (NEMA 6-20R) | - | 1 |
| AC waveform | Pure sine wave | - |
| USB-C ports | 4 (up to 100 W each) | 4 (up to 100 W each) |
| USB-A ports | 2 | 2 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 2 | 2 |
| UPS / pass-through | Yes (10 ms switchover) | Yes (20 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)) | 3 h (About 3 h from 120V at 1800W, or 1.5 h from 240V at 3600W (manufacturer)) |
| Max solar input | 2,000 W | 2,000 W |
| Solar input voltage | 12-160V, 20A | 12-60V |
| Car charging | 120 W | 96 W |
| Build | ||
| Weight | 92.6 lb (42 kg) | 99 lb (45 kg) |
| Dimensions | 24.0 x 12.6 x 18.7 in | 20.4 x 12.3 x 16.5 in |
| App | FOSSiBOT app | myGro app (Wi-Fi and Bluetooth) |
| Warranty | 5 years | 5 years |
| Released | 2024-07 | 2024-09 |