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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
  • Generac #8947 iQ5200DF
  • Model 30814 P4500 PowerSmart
    Model 30814 P4500 PowerSmart

    Briggs & Stratton 3,700W Gas Generator

    3700W
    Running
    60 dB
    Noise
    View details
  • Model #8947 iQ5200DF
    Model #8947 iQ5200DF

    Generac 3,900W Dual-Fuel Generator

    3900W
    Running
    0 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
SpecificationBriggs & Stratton 30814 P4500 PowerSmartGenerac #8947 iQ5200DF
General
Product type
Generator
Generator
Fuel
Gasoline
Dual-Fuel
InverterYesYes
Parallel capableNoYes
RV readyNoNo
Running watts
3700 W
Winner: Winner: 3900 W
Starting watts
4500 W
Winner: Winner: 5200 W
Noise (lower limit)
Winner: Winner: 60 dB
0 dB
Weight
Winner: Winner: 104 lbs
107 lbs
Run time @50% load
Not available
Winner: Winner: 9 h
Run time @25% load
16 h
15 h
Fuel tank
3.5 gal
3.2 gal
Fuel gaugeYesNo
Approx. dimensions (L × W × H)
24.5 x 17.6 x 20.36
24.6 x 20.3 x 22.5
Electrical
Voltage (AC)
120
120
Voltage (DC)
5
5
GFCI outletsNoYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
3 %
<3% %
Engine
Engine
Briggs & Stratton OHV 4-stroke 224 cc
223 cc OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil, Electric, Remote
Recoil, Electric
Warranty
Warranty
3 years
3 years
Power by fuel
GasolineNot availableNot available
Running watts
3700 W
3900 W
Starting watts
4500 W
5200 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 h
Run time @25% load
16 h
15 h
PropaneNot availableNot available
Running watts
Not available
3500 W
Starting watts
Not available
4700 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
11 h
Run time @25% load
Not available
20 h
Other
Data center
Not available
Not available
Indicators
true
false
Compliance
CARB, EPA
CARB, EPA, ANSI/PGMA G300-2023
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Floating
true
UPC
11675308148
696471104509
Core / High-priority specs
Running Watts (Gasoline)
3700
3900
Running Watts (Propane)
Not available
3500
Starting Watts (Gasoline)
4500
5200
Starting Watts (Propane)
Not available
4700
Runtime @ 50% Load (Gasoline)
Not available
9
Runtime @ 50% Load (Propane)
Not available
11
Runtime @ 25% Load (Gasoline)
16
15
Runtime @ 25% Load (Propane)
Not available
20
AC Outlet Types
2x 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
Briggs & Stratton OHV 4-stroke
OHV 4-stroke
Engine Displacement
224
223
Engine Oil Type
Not available
10W-30 / SAE 30
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
16
15
Runtime @ 50% Load (Gasoline)
Not available
9
Runtime @ 50% Load (Propane)
Not available
11
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
Oil, funnel, tool kit, propane hose, and battery
Included Accessories
Oil, funnel, key fob, and battery
Oil, funnel, tool kit, propane hose, and battery
Warranty & identification
Commercial Warranty
3
Not available
Part Number
30814
8947, 8945
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 Generac iQ5200DF is a 3,900-watt dual-fuel inverter generator that bridges emergency home backup and recreational use. At this output level, it powers essential circuits like refrigerators, sump pumps, and window air conditioners simultaneously, but not a full house or central HVAC. The dual-fuel design lets owners switch between gasoline and propane based on availability, a genuine advantage when supply chains break down during extended outages. Because the iQ5200DF produces electronically regulated current with less than 3% THD, laptops, flat-screen TVs, CPAP machines, and smart home devices run safely without voltage-related risk.
  • Most Powerful
    Generac #8947 iQ5200DF
    3900W running
  • Quietest
    Briggs & Stratton 30814 P4500 PowerSmart
    60 dB
  • Longest Runtime
    Generac #8947 iQ5200DF
    9h at 50% load
Where to buy
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Briggs & Stratton 30814 P4500 PowerSmart
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Generac #8947 iQ5200DF
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