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

  • Briggs & Stratton 30814 P4500 PowerSmart
  • Yamaha EF4500iSE
  • Model 30814 P4500 PowerSmart
    Model 30814 P4500 PowerSmart

    Briggs & Stratton 3,700W Gas Generator

    3700W
    Running
    60 dB
    Noise
    View details
  • Model EF4500iSE
    Model EF4500iSE

    Yamaha 4,000W Gas Generator

    4000W
    Running
    58 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 @25%
h
Running watts by fuel
Shows how output changes across gasoline/propane/natural gas (when available).
Generator Specifications Comparison
SpecificationBriggs & Stratton 30814 P4500 PowerSmartYamaha EF4500iSE
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterYesYes
Parallel capableNoNo
RV readyNoNo
Running watts
3700 W
Winner: Winner: 4000 W
Starting watts
Winner: Winner: 4500 W
Winner: Winner: 4500 W
Noise (lower limit)
60 dB
Winner: Winner: 58 dB
Weight
Winner: Winner: 104 lbs
209 lbs
Run time @50% load
Not available
Not available
Run time @25% load
Winner: Winner: 16 h
15.2 h
Fuel tank
3.5 gal
4.5 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
24.5 x 17.6 x 20.36
30.7 x 24.3 x 27.2
Electrical
Voltage (AC)
120
120
Voltage (DC)
5
Not available
GFCI outletsNoNo
Covered outletsYesNo
Automatic Voltage RegulationYesYes
THD
3 %
3 %
Engine
Engine
Briggs & Stratton OHV 4-stroke 224 cc
Yamaha MZ360 OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil, Electric, Remote
Electric
Warranty
Warranty
3 years
3 years
Power by fuel
GasolineNot availableNot available
Running watts
3700 W
4000 W
Starting watts
4500 W
4500 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
Not available
Run time @25% load
16 h
15.2 h
Other
Data center
Not available
Not available
Indicators
true
true
Compliance
CARB, EPA
CARB, EPA
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Floating
Floating
UPC
11675308148
765053833196
Core / High-priority specs
Running Watts (Gasoline)
3700
4000
Starting Watts (Gasoline)
4500
4500
Runtime @ 25% Load (Gasoline)
16
15.2
AC Outlet Types
2x Duplex 120V 20A (5-20R)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
Briggs & Stratton OHV 4-stroke
OHV 4-stroke
Engine Displacement
224
357
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
16
15.2
Controls & display
Display Type
Digital
Not available
Safety & compliance
Overload Protection System
Low oil and overload protection, CO monitoring
Low oil and overload protection, CO monitoring
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesYes
Included equipment
Starting Components
Recoil, Electric, Remote
Not available
Included Accessories
Oil, funnel, key fob, and battery
Battery
Warranty & identification
Commercial Warranty
3
Not available
Part Number
30814
EF45ISEZ
Additional specs
Summary
The Briggs & Stratton 30814 P4500 PowerSmart is a 3700-watt inverter generator built for users who need reliable backup power without the noise of traditional models. At 60 decibels, it runs quiet enough for residential neighborhoods and campgrounds, making it suitable for homeowners managing outages, campers extending trips, and outdoor enthusiasts who cannot tolerate generator noise. The 4500-watt peak output handles startup surges for larger appliances like air conditioning units or power tools, while the 3700-watt running capacity sustains continuous operation. With a 3.5-gallon fuel tank and 16-hour runtime at 25% load, users can power essential devices through a full night or longer without refueling. The inverter technology produces only 3% THD, which means laptops, smartphones, and other sensitive electronics charge safely without risk of voltage spikes or damage.
The Yamaha EF4500iSE is a 4500-watt inverter generator designed for maximum efficiency and minimal noise, suitable for emergency backup, recreational use, and DIY projects.
  • Most Powerful
    Yamaha EF4500iSE
    4000W running
  • Quietest
    Yamaha EF4500iSE
    58 dB
  • Longest Runtime
    h at 50% load
Where to buy
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Briggs & Stratton 30814 P4500 PowerSmart
Store links
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Yamaha EF4500iSE
Store links
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