The two supply similar watts (3,600 W vs 3,650 W). The power station has no exhaust, so it can sit indoors under the maker's rules and needs no fuel. The generator runs as long as you can supply fuel; the battery stops when it is empty unless you can recharge it.
Side by side
| Specification | FOSSiBOT F3600 Pro Portable Power Station (USF3600-Pro) | FIRMAN Gas Portable Generator 4550/3650W Remote Start 120/240V (P03631) |
|---|---|---|
| Technology | Battery and inverter | Engine-driven generator |
| Capacity or fuel | 3,840 Wh stored | Gasoline |
| Continuous output | 3,600 W | 3,650 W |
| Surge or starting | — | 4,550 W |
| Indoor use | Allowed per the maker's manual (no exhaust) | Never indoors — carbon monoxide |
| Noise (as stated) | — | — |
| Weight | 92.59 lb | 119.5 lb |
| Runtime on a refrigerator (calc) | 2.3 days per charge | Until fuel runs out |
| Refuel or recharge | Wall, solar or generator | Fuel you must store and carry |
| Price seen | $1,199 | $1,090 |
| Price per watt of output (calc) | $0.33 | $0.30 |
Highlighted rows differ. Figures come from each product's sources; runtime, recharge and cost rows are Wattstanding calculations using the same method for both.
Which should you choose?
FOSSiBOT F3600 Pro Portable Power Station (USF3600-Pro)
Choose the FOSSiBOT F3600 Pro Portable Power Station (USF3600-Pro) if output is not the deciding factor or you cannot store fuel or want a silent, indoor-safe backup.
FIRMAN Gas Portable Generator 4550/3650W Remote Start 120/240V (P03631)
Choose the FIRMAN Gas Portable Generator 4550/3650W Remote Start 120/240V (P03631) if you expect outages lasting days.
Before you buy either
- Total your loads with the appliance load & runtime calculator.
- Confirm what each seller includes — accessories, software trials and bundles change often.
- Read the limitations on each full reference page.
Wattstanding compares published specifications; we have not tested these products side by side. How we work · Disclosure