Compare Generators Side-by-Side

Generator

Generator

5000 W

178 lbs

20 h

120

120/240

223 cc OHV 4-stroke, cast iron sleeve.

300 cc OHV 4-stroke

Recoil

Recoil

3 years

2 years

5000 W

6875 W

20 h

CARB, EPA, ANSI/PGMA G300-2023

CARB, EPA

850016881298

815683020036

4000

5500

15

2x Duplex 120V 20A (5-20R); 1x 120V 30A (L5-30R); 1x 120V 30A (TT-30R)

2x Duplex 120V 20A (5-20R) GFCI, 1x 120/240V 30A (L14-30R)

60

60

OHV 4-stroke

OHV 4-stroke

cast iron sleeve

20

Low oil and overload protection, CO monitoring

Low oil and overload protection

Oil, funnel, tool kit, and wheel kit.

Oil, funnel, tool kit, and wheel kit

3

The A-iPower GXS5000 is a 4000-watt gasoline generator built for homeowners and RV users who need reliable backup power without excessive noise. With 5000 watts of starting power, it can kick-start larger appliances like air conditioners and well pumps, then sustain 4000 watts of continuous output for essential devices. This wattage class handles a full home backup scenario or powers a job site with moderate tool use, but not heavy industrial equipment or multiple high-draw appliances simultaneously. At 68 decibels, the GXS5000 runs quieter than most generators in its class. The 6.3-gallon fuel tank delivers 20 hours of runtime at 25 percent load, meaning light-duty use like charging devices or running a refrigerator stretches a full tank across an entire day. The recoil start system and included wheel kit make this a grab-and-go option for users who value simplicity over push-button convenience.

The Cat RP5500 is a 5500-watt gasoline generator built for homeowners, contractors, and outdoor enthusiasts who need reliable backup power without the complexity of larger units. This wattage tier handles most household circuits simultaneously, meaning you can run a refrigerator, well pump, and power tools at the same time, but not your entire home's air conditioning system. The 6875-watt peak capacity gives it the muscle to start high-inrush devices like compressors and sump pumps without stalling. Because the RP5500 runs on gasoline, fuel is available at any gas station, eliminating the supply chain friction of propane or diesel models. The 7.9-gallon tank paired with 15-hour runtime at half load means you refuel roughly once per day under typical use, not every few hours.