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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.

  • NorthStar c15000s
  • Westinghouse WGen20000
  • Model c15000s
    Model c15000s

    NorthStar 13,500W Gas Generator

    13500W
    Running
    73 dB
    Noise
    View details
  • Model WGen20000
    Model WGen20000

    Westinghouse 20,000W Gas Generator

    20000W
    Running
    74 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
SpecificationNorthStar c15000sWestinghouse WGen20000
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterNoNo
Parallel capableNoNo
RV readyNoNo
Running watts
13500 W
Winner: Winner: 20000 W
Starting watts
15000 W
Winner: Winner: 28000 W
Noise (lower limit)
Winner: Winner: 73 dB
74 dB
Weight
Winner: Winner: 390 lbs
540 lbs
Run time @50% load
10.6 h
Winner: Winner: 11 h
Run time @25% load
Not available—
13 h
Fuel tank
12 gal
17.17 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
43 x 36 x 35
38 x 35 x 40.4
Electrical
Voltage (AC)
120/240V 60 Hz
120/240
Voltage (DC)
Not available—
Not available—
GFCI outletsYesYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
<5% %
5 %
Engine
Engine
688 cc Honda GX690 OHV V-Twin
OHV V-Twin, cast iron sleeve
Alternator
Not available—
Not available—
Starting system
Electric
Electric
Warranty
Warranty
4 years
3 years
Power by fuel
GasolineNot available—Not available—
Running watts
13500 W
20000 W
Starting watts
15000 W
28000 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
10.6 h
11 h
Run time @25% load
Not available—
13 h
Other
Data center
Not available—
Not available—
Indicators
false
false
Compliance
CARB, EPA
EPA
Security
Not available—
Not available—
Spark arrestorYesYes
Neutral
true
true
UPC
840321737861
850011336601
Core / High-priority specs
Running Watts (Gasoline)
13500
20000
Starting Watts (Gasoline)
15000
28000
Runtime @ 50% Load (Gasoline)
10.6
11
Runtime @ 25% Load (Gasoline)
Not available—
13
AC Outlet Types
3x Duplex 120V 20A (5-20R) GFCI1x 120V 30A (L5-30R)1x 120/240V 30A (L14-30R)1x 120/240V 60A (14-60R)
2x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R); 2x 120/240V 30A (L14-30R); 2x 120/240V 50A (14-50R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
Honda GX690 OHV V-Twin
OHV V-Twin
Engine Displacement
688
999
Cylinder Sleeve
Not available—
cast iron sleeve
Alternator Winding Material
Not available—
Copper
Engine Oil Type
Not available—
SAE 10W-30
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
Not available—
13
Runtime @ 50% Load (Gasoline)
10.6
11
Safety & compliance
Overload Protection System
Low oil and overload protection
Low oil and overload protection
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesNo
Included equipment
Included Accessories
Funnel, battery, and wheel kit
Oil, funnel, tool kit, battery, and wheel kit
Warranty & identification
Commercial Warranty
4
3
Additional specs
Summary
The NorthStar c15000s is a commercial-grade portable generator powered by a Honda GX690 OHV engine, delivering 15,000 surge watts and 13,500 rated watts. It features Quiet Armor Technology for reduced noise, a built-in battery charger/maintainer, and carbon monoxide detection with automatic shutdown for enhanced safety.
The Westinghouse WGen20000TFc is a tri-fuel portable generator capable of producing up to 28,000 peak watts and 20,000 running watts, suitable for home backup and job site power needs.
  • Most Powerful
    Westinghouse WGen20000
    20000W running
  • Quietest
    NorthStar c15000s
    73 dB
  • Longest Runtime
    Westinghouse WGen20000
    11h at 50% load
Where to buy
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NorthStar c15000s
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Westinghouse WGen20000
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