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 3.8. The FOSSiBOT F3600 Pro leads on value and portability. The EcoFlow DELTA Pro 3 wins on AC output and solar input. The FOSSiBOT F3600 Pro costs $1,660 less ($1,139 vs $2,799).
EcoFlow DELTA Pro 3
#15 in Home backupFull review
For households that want a single wheeled unit able to back up 240V circuits and expand toward whole-home capacity.
Amazon $2,799 EcoFlow $2,799$2,799
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 $0.68 per rated Wh) and portability (91 Wh per kg (92.6 lb (42 kg)) vs 80 Wh per kg (113.5 lb (51.5 kg))).
- Choose the EcoFlow DELTA Pro 3 for AC output (4,000 W continuous AC vs 3,600 W continuous AC) and solar input (2,600 W max solar input vs 2,000 W max solar input).
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 | EcoFlow DELTA Pro 3 |
|---|---|---|
| Overall rating | 4.0/5 | 3.8/5 |
| Value 25% | 100 $0.30 per rated Wh | 41 $0.68 per rated Wh |
| Tested capacity 15% | 50 not yet independently tested (neutral score used) | 100 93% of rated capacity delivered (1 test) |
| 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 | 46 4,000 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)) | 63 80 Wh per kg (113.5 lb (51.5 kg)) |
| Solar input 5% | 44 2,000 W max solar input | 57 2,600 W max solar input |
| Features 5% | 100 UPS (10 ms), expandable, 100 W USB-C, app | 100 UPS (10 ms), expandable, 100 W USB-C, app |
Independent capacity tests
FOSSiBOT F3600 Pro
No independent test published yet.
EcoFlow DELTA Pro 3
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| OutdoorGearLab | 3,790 Wh | 92.5% | Full-discharge AC test; OutdoorGearLab states over 93%, 3790/4096 works out to 92.5%. Recharged from empty in about 3.2 h at about 1600W peak. |
Specifications
| FOSSiBOT F3600 Pro | EcoFlow DELTA Pro 3 | |
|---|---|---|
| Battery | ||
| Rated capacity | 3,840 Wh | 4,096 Wh |
| Tested usable capacity | - | 3,790 Wh (93%) |
| 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 12,000 Wh |
| Output | ||
| AC output | 3,600 W (7,200 W surge) | 4,000 W (8,000 W surge) |
| Boost mode (resistive loads) | - | 6,000 W |
| AC outlets | 5 total | 7 total |
| 120V 20A outlets (NEMA 5-20R) | 4 | 4 |
| RV 30A outlet (TT-30R) | 1 | 1 |
| 120/240V 30A twist-lock (NEMA L14-30R) | - | 1 |
| 240V 20A outlet (NEMA 6-20R) | - | 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 | - |
| DC5521 ports | 2 | 1 |
| UPS / pass-through | Yes (10 ms switchover) | Yes (10 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)) | - |
| Max solar input | 2,000 W | 2,600 W |
| Solar input voltage | 12-160V, 20A | HV 30-150V (1600W) + LV 11-60V (1000W) |
| Car charging | 120 W | - |
| Build | ||
| Weight | 92.6 lb (42 kg) | 113.5 lb (51.5 kg) |
| Dimensions | 24.0 x 12.6 x 18.7 in | 27.28 x 16.16 x 13.43 in |
| App | FOSSiBOT app | Wi-Fi + Bluetooth |
| Warranty | 5 years | 5 years |