Compare Generators Side-by-Side

Generator

Generator

3650 W

108 lbs

16.8 h

10 h

120

120

224 cc OHV 4-stroke

193 cc Firman Max-Pro Series OHV 4-Stroke, Cast Iron Sleeve

Recoil, Electric, Remote

Recoil

3 years

3 years

5000 W

3650 W

16.8 h

10 h

3500 W

CARB, EPA, ANSI/PGMA G300-2023

CARB, EPA

840876133811

3900

3300

5000

3650

13

20

60

60

224 cc OHV 4-stroke

OHV 4-Stroke

Cast iron sleeve

16.8

10

Low oil and overload protection; CO monitoring

Low oil and overload protection

Recoil

3

3

The Cummins Onan P5000iDF EFI is a 3900-watt dual-fuel inverter generator built for RV owners, campers, and homeowners who need reliable portable power without excessive noise. Its 5000-watt peak capacity handles startup demands of air conditioners, power tools, and multiple appliances simultaneously. The dual-fuel design means you can run gasoline when convenient and switch to propane for longer storage life or when gasoline is unavailable. At 52 dBA, this unit operates as quietly as normal conversation, making it suitable for campgrounds and residential neighborhoods where noise restrictions apply. The inverter technology produces clean power with only 3 percent THD, protecting laptops, smartphones, and sensitive electronics from voltage spikes that damage circuits.

The Firman W03381 is a 3300-watt inverter generator built around a 193cc OHV 4-stroke engine with a cast iron sleeve. This wattage puts it in the mid-range portable segment, capable of powering a refrigerator, microwave, and several household circuits simultaneously, or running a single large tool on a job site. The 3650-watt starting capacity handles the inrush demand of compressors and air conditioning units. Because the W03381 runs on gasoline with a 1.8-gallon tank, users will find a 10-hour runtime at 25% load, which translates to roughly 2.5 hours of continuous full-load operation before refueling becomes necessary. The inverter topology and 3% THD output mean sensitive electronics like laptops, phones, and televisions receive stable, clean power without risk of damage. At 58 decibels, this generator operates at a volume comparable to normal conversation, making it suitable for residential neighborhoods and RV parks where noise restrictions apply.