Compare Generators Side-by-Side

Generator

Generator

3300 W

131.4 lbs

14.5 h

7 h

120/240

120

322 cc OHV 4-stroke, cast iron sleeve.

Generac OHV 149 cc 4-stroke

Recoil, Electric

Recoil

3 years

3 years

6850 W

3300 W

14.5 h

7 h

4500 W

6250 W

9.5 h

EPA, ANSI/PGMA G300-2023

EPA, ANSI/PGMA G300-2023

840876155714

696471104011

5500

2500

4500

6250

4.5

9.5

60

60

OHV 4-stroke

OHV 4-stroke

cast iron sleeve

14.5

7

Low oil and overload protection, CO monitoring

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

Recoil

3

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.

The Generac GP3300i is a 2,500-watt inverter generator built for users who need portable, clean power without the weight penalty. At 59.5 lbs, it moves easily between campsites, tailgates, and home backup scenarios. The 3,300-watt starting capacity handles motor-driven equipment, while sub-3% THD protects laptops and phones from voltage spikes.