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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.

  • Cummins Onan P4500i
  • ECHO EG-3500
  • Model Onan P4500i
    Model Onan P4500i

    Cummins 3,700W Gas Generator

    3700W
    Running
    52 dB
    Noise
    View details
  • Model EG-3500
    Model EG-3500

    ECHO 2,800W Gas Generator

    2800W
    Running
    72 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
SpecificationCummins Onan P4500iECHO EG-3500
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterYesNo
Parallel capableYesNo
RV readyYesNo
Running watts
Winner: Winner: 3700 W
2800 W
Starting watts
Winner: Winner: 4500 W
3500 W
Noise (lower limit)
Winner: Winner: 52 dB
72 dB
Weight
Winner: Winner: 98 lbs
110 lbs
Run time @50% load
Winner: Winner: 15 h
10 h
Run time @25% load
18 h
Not available
Fuel tank
3.4 gal
4 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
24.5 x 18.3 x 20.5
25 x 24.5 x 21.5
Electrical
Voltage (AC)
120
120
Voltage (DC)
5
Not available
GFCI outletsNoYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
3 %
Not available
Engine
Engine
224 cc Ducar OHV 4-stroke
212 cc OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil; Electric; Remote
Recoil
Warranty
Warranty
3 years
3 years
Power by fuel
GasolineNot availableNot available
Running watts
3700 W
2800 W
Starting watts
4500 W
3500 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
15 h
10 h
Run time @25% load
18 h
Not available
Other
Data center
Not available
Not available
Indicators
true
Not available
Compliance
CARB, EPA
CARB, EPA
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Floating
Bonded to frame
UPC
690781007925
743184017586
Core / High-priority specs
Running Watts (Gasoline)
3700
2800
Starting Watts (Gasoline)
4500
3500
Runtime @ 50% Load (Gasoline)
15
10
Runtime @ 25% Load (Gasoline)
18
Not available
AC Outlet Types
1x Duplex 120V 20A (5-20R); 1x 120V 30A (TT-30R)
2x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
Ducar OHV 4-stroke
OHV 4-stroke
Engine Displacement
224
212
Engine Oil Type
10W30
Not available
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
18
Not available
Runtime @ 50% Load (Gasoline)
15
10
Safety & compliance
Overload Protection System
Low oil and overload protection
Low oil and overload protection
Low Oil ProtectionYesYes
Included equipment
Included Accessories
Oil, funnel, tool kit, key fob, battery charger, and battery
Wheel kit
Warranty & identification
Commercial Warranty
3
Not available
Part Number
A058U955
Not available
Additional specs
Summary
The Cummins Onan P4500i is a 3700-watt inverter generator built for users who need reliable power without the noise penalty. Its 4500-watt peak capacity handles startup surges for air conditioners, power tools, and RV air conditioning units. The gasoline engine runs clean enough for sensitive electronics like laptops and phones, thanks to a 3 percent THD rating that protects against voltage spikes. This unit bridges the gap between portable camping generators and stationary backup power, making it useful for RV owners, homeowners facing extended outages, and contractors working near occupied spaces.
The ECHO EG-3500 is a 2,800-watt gasoline generator built around a 212 cc OHV 4-stroke engine. At this wattage, it handles essential household loads like refrigerators, sump pumps, and power tools, but cannot run a central air conditioner or multiple high-demand appliances simultaneously. The 3,500-watt peak output gives it a brief surge capacity for motor startup, which matters when powering devices with inrush current demands. ECHO positions this unit for homeowners managing short outages, campers needing overnight power, and contractors powering hand tools on job sites where grid access is unavailable.
  • Most Powerful
    Cummins Onan P4500i
    3700W running
  • Quietest
    Cummins Onan P4500i
    52 dB
  • Longest Runtime
    Cummins Onan P4500i
    15h at 50% load
Where to buy
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Cummins Onan P4500i
Store links
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ECHO EG-3500
Store links
No links yet.
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