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Compare Generators Side-by-Side

Select up to 4 generators to compare specs, power output, noise levels, runtime and more. Your compare URL is shareable.

  • A-iPower GXS5000
  • Powerhorse 2500i
  • Model GXS5000
    Model GXS5000

    A-iPower 4,000W Gas Generator

    4000W
    Running
    68 dB
    Noise
    View details
  • Model 2500i
    Model 2500i

    Powerhorse 1,800W Gas Generator

    1800W
    Running
    62 dB
    Noise
    View details
Quick charts
Each chart uses its own Y-axis scale (so numbers are comparable within a chart).
Running watts
W
Starting watts
W
Noise
dB
Runtime @50%
h
Running watts by fuel
Shows how output changes across gasoline/propane/natural gas (when available).
Generator Specifications Comparison
SpecificationA-iPower GXS5000Powerhorse 2500i
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterNoYes
Parallel capableNoYes
RV readyYesNo
Running watts
Winner: Winner: 4000 W
1800 W
Starting watts
Winner: Winner: 5000 W
2500 W
Noise (lower limit)
68 dB
Winner: Winner: 62 dB
Weight
111.6 lbs
Winner: Winner: 48.3 lbs
Run time @50% load
Not available
Winner: Winner: 9.5 h
Run time @25% load
20 h
10.5 h
Fuel tank
6.3 gal
1.2 gal
Fuel gaugeYesNo
Approx. dimensions (L × W × H)
24 x 23.6 x 24
20.4 x 12.5 x 18.3
Electrical
Voltage (AC)
120
120
Voltage (DC)
Not available
Not available
GFCI outletsNoNo
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
23 %
3 %
Engine
Engine
223 cc OHV 4-stroke, cast iron sleeve.
80 cc OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil
Recoil
Warranty
Warranty
3 years
2 years
Power by fuel
GasolineNot availableNot available
Running watts
4000 W
Not available
Starting watts
5000 W
2500 W
Running amps (120V)
Not available
Not available
Running amps (240V)
Not available
Not available
Peak amps (120V)
Not available
Not available
Peak amps (240V)
Not available
Not available
Run time @50% load
Not available
9.5 h
Run time @25% load
20 h
10.5 h
Other
Data center
Not available
Not available
Indicators
true
true
Compliance
CARB, EPA, ANSI/PGMA G300-2023
EPA, ANSI/PGMA G300-2023
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Not available
Floating
UPC
850016881298
840321763969
Core / High-priority specs
Running Watts (Gasoline)
4000
Not available
Starting Watts (Gasoline)
5000
2500
Runtime @ 50% Load (Gasoline)
Not available
9.5
Runtime @ 25% Load (Gasoline)
20
10.5
AC Outlet Types
2x Duplex 120V 20A (5-20R); 1x 120V 30A (L5-30R); 1x 120V 30A (TT-30R)
1x Duplex 120V 20A (5-20R); 1x 120V 30A (L5-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-stroke
80 cc OHV 4-stroke
Engine Displacement
223
80
Cylinder Sleeve
cast iron sleeve
Not available
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
20
10.5
Runtime @ 50% Load (Gasoline)
Not available
9.5
Safety & compliance
Overload Protection System
Low oil and overload protection, CO monitoring
Low oil and overload protection, CO monitoring
Low Oil ProtectionNoYes
Carbon Monoxide MonitoringYesYes
Included equipment
Included Accessories
Oil, funnel, tool kit, and wheel kit.
Funnel and tool kit
Warranty & identification
Commercial Warranty
3
2
Additional specs
Summary
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 Powerhorse 2500i is a portable inverter generator delivering 2,500 surge watts and 1,800 rated watts, featuring a quiet 52dB operation, CO shutdown function, and parallel-ready design for increased power needs.
  • Most Powerful
    A-iPower GXS5000
    4000W running
  • Quietest
    Powerhorse 2500i
    62 dB
  • Longest Runtime
    Powerhorse 2500i
    9.5h at 50% load
Where to buy
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A-iPower GXS5000
Store links
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Powerhorse 2500i
Store links
No links yet.
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