Compare Generators Side-by-Side

Generator

Generator

5000 W

131.4 lbs

16.8 h

14.5 h

120

120/240

224 cc OHV 4-stroke

322 cc OHV 4-stroke, cast iron sleeve.

Recoil, Electric, Remote

Recoil, Electric

3 years

3 years

5000 W

6850 W

16.8 h

14.5 h

3500 W

5000 W

5500 W

CARB, EPA, ANSI/PGMA G300-2023

EPA, ANSI/PGMA G300-2023

840876155714

3900

5500

4500

4500

6250

13

20

9.5

60

60

224 cc OHV 4-stroke

OHV 4-stroke

cast iron sleeve

16.8

14.5

Low oil and overload protection; CO monitoring

Low oil and overload protection, CO monitoring

Oil, funnel, tool kit, propane hose, and battery

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 WT05571 is a 5,500-watt tri-fuel generator that runs on gasoline, propane, or natural gas. On gasoline, it delivers 6,850 starting watts and 5,500 running watts, enough to power a full home electrical panel during an outage or run multiple job site tools simultaneously. On propane, output drops to 6,250 starting and 5,000 running watts. On natural gas, it falls to 5,500 starting and 4,500 running watts. This fuel flexibility means users can switch between sources based on availability, cost, or storage preference without buying multiple generators. The tri-fuel capability makes this unit valuable for homeowners in regions with natural gas infrastructure, RV owners who can refill propane at any campground, and contractors who need to adapt to job site fuel availability. The 3 percent THD rating protects laptops, televisions, and other sensitive electronics from voltage spikes that damage circuits. At 67 decibels, the noise level sits between a typical conversation and heavy traffic, making it suitable for residential neighborhoods but audible enough that neighbors will know it is running.