Compare Generators Side-by-Side

Generator

Generator

2500 W

91 lbs

10 h

9 h

120

120

98 cc Ducar OHV 4-stroke engine

193 cc OHV 4-stroke, cast iron sleeve.

Recoil

Recoil, Electric, Remote

3 years

3 years

2500 W

3650 W

10 h

9 h

CARB, EPA

CARB, EPA

690781007918

840876133866

2200

3300

8

1x Duplex 120V 20A (5-20R)

1x Duplex 120V 20A (5-20R); 1x 120V 30A (TT-30R)

60

60

Ducar OHV 4-stroke

OHV 4-stroke

cast iron sleeve

10

9

Low oil and overload protection

Low oil and overload protection

Oil, funnel, and tool kit

Oil, funnel, tool kit, key fob, battery charger, battery charging cables, and battery

3

The Cummins Onan P2500i is a 2200-watt inverter generator built for users who need portable power without sacrificing runtime or noise control. At 48 pounds and measuring 19.8 by 10.5 by 18.3 inches, this unit bridges the gap between true portability and practical capacity. It can run a microwave, small refrigerator, or circular saw continuously, making it suitable for camping trips, job sites, tailgating, and emergency backup. The 1-gallon fuel tank delivers 10 hours at 25 percent load and 8 hours at 50 percent load, meaning most users refuel once per day rather than multiple times. The inverter topology produces clean power with less than 3 percent THD, which protects laptops, phone chargers, and sensitive electronics from voltage spikes. Cummins backs this unit with a 3-year warranty, longer than the 2.4-year average for comparable inverter generators. The 52 dBA noise level sits between a normal conversation and light traffic, allowing operation in noise-restricted campgrounds and residential neighborhoods without drawing complaints.

The Firman W03386 is a 3,300-watt inverter generator built for RV camping, emergency backup, and light job site work. Its 3,650-watt peak capacity handles startup surges from air conditioning units, refrigerators, and power tools without strain. Because the unit runs on gasoline with a 1.8-gallon tank, users get up to 9 hours of runtime at 25% load before refueling. The inverter topology and sub-3% THD output means laptops, smartphones, and sensitive electronics charge safely without voltage spikes that damage circuitry. At 58 dB, it operates at conversational volume, making it acceptable for residential neighborhoods and campgrounds where noise restrictions apply. This is a mid-sized workhorse for users who need portable power without the weight penalty of larger stationary units.