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 3.1. The FOSSiBOT F3600 Pro leads on value and portability. The Goal Zero Yeti PRO 4000 wins on solar input and charging speed. The FOSSiBOT F3600 Pro costs $2,860.95 less ($1,139 vs $3,999.95).
Goal Zero Yeti PRO 4000
#28 in Home backupFull review
For RV owners and home-backup buyers who want a rugged 4 kWh station with a 30A RV outlet and room to expand, and who won’t be lifting it often.
Amazon Goal Zero $3,999.95$3,999.95
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 value ($0.30 per rated Wh vs $1.00 per rated Wh) and portability (91 Wh per kg (92.6 lb (42 kg)) vs 76 Wh per kg (115.7 lb (52.5 kg))).
- Choose the Goal Zero Yeti PRO 4000 for solar input (3,000 W max solar input vs 2,000 W max solar input) and charging speed (0-100% on AC in 2 h 36 min vs 0-100% on AC in 3 h).
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 | Goal Zero Yeti PRO 4000 |
|---|---|---|
| Overall rating | 4.0/5 | 3.1/5 |
| Value 25% | 100 $0.30 per rated Wh | 0 $1.00 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 | 44 0-100% on AC in 2 h 36 min |
| Portability 10% | 84 91 Wh per kg (92.6 lb (42 kg)) | 56 76 Wh per kg (115.7 lb (52.5 kg)) |
| Solar input 5% | 44 2,000 W max solar input | 71 3,000 W max solar input |
| Features 5% | 100 UPS (10 ms), expandable, 100 W USB-C, app | 100 UPS (15 ms), expandable, 100 W USB-C, app |
Specifications
| FOSSiBOT F3600 Pro | Goal Zero Yeti PRO 4000 | |
|---|---|---|
| Battery | ||
| Rated capacity | 3,840 Wh | 3,993.6 Wh |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 6,500 to 80% per product description and Amazon; US spec table says to 50% | 4,000 to 80% |
| Expandable | Yes, up to 11,520 Wh | Yes, up to 19,968 Wh |
| Output | ||
| AC output | 3,600 W (7,200 W surge) | 3,600 W (7,200 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) | 3 (up to 100 W each) |
| USB-A ports | 2 | 3 |
| 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 36 min (2.6 h full per Goal Zero comparison chart (user guide says about 3 h); 0-80% in 2 h) |
| Max solar input | 2,000 W | 3,000 W |
| Solar input voltage | 12-160V, 20A | HPP 13.3-150V (3000W) + 8mm 12.3-28V (275W) |
| Car charging | 120 W | - |
| Build | ||
| Weight | 92.6 lb (42 kg) | 115.7 lb (52.5 kg) |
| Dimensions | 24.0 x 12.6 x 18.7 in | 21.4 x 13.8 x 14.8 in (with removable cart: 18.1 in tall, 125.7 lb) |
| App | FOSSiBOT app | Goal Zero Power app |
| Warranty | 5 years | 5 years |