Skip to content

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.

  • Generac #7705 GP15500EFI
  • Honda EB5000X
  • Model #7705 GP15500EFI
    Model #7705 GP15500EFI

    Generac 15,500W Gas Generator

    15500W
    Running
    0 dB
    Noise
    View details
  • Model EB5000X
    Model EB5000X

    Honda 4,500W Gas Generator

    4500W
    Running
    63 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
SpecificationGenerac #7705 GP15500EFIHonda EB5000X
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterNoNo
Parallel capableNoNo
RV readyYesNo
Running watts
Winner: Winner: 15500 W
4500 W
Starting watts
Winner: Winner: 19300 W
5000 W
Noise (lower limit)
0 dB
Winner: Winner: 63 dB
Weight
420 lbs
Winner: Winner: 210.8 lbs
Run time @50% load
Winner: Winner: 11 h
10.5 h
Run time @25% load
Not available
10.5 h
Fuel tank
14.2 gal
6.2 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
58.5 x 30.9 x 36.5
41.1 x 27.8 x 30.4
Electrical
Voltage (AC)
120/240
120/240
Voltage (DC)
Not available
Not available
GFCI outletsYesYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
<5% %
10 %
Engine
Engine
Generac G-Force OVHI 4-stroke
Honda iGX390 OHV 4-stroke, cast iron sleeve
Alternator
Not available
Not available
Starting system
Electric
Recoil
Warranty
Warranty
3 years
3 years
Power by fuel
GasolineNot availableNot available
Running watts
15500 W
4500 W
Starting watts
19300 W
5000 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
11 h
10.5 h
Run time @25% load
Not available
Not available
Other
Data center
Not available
Not available
Indicators
false
false
Compliance
EPA
EPA, ANSI/PGMA G300-2023
Security
Not available
Not available
Spark arrestorYesYes
Neutral
true
true
UPC
696471083705
786102007368
Core / High-priority specs
Running Watts (Gasoline)
15500
4500
Starting Watts (Gasoline)
19300
5000
Runtime @ 50% Load (Gasoline)
11
10.5
AC Outlet Types
2x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R)
2x Duplex 120V 20A (5-20R); 1x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
G-Force OVHI 4-stroke
OHV 4-stroke, cast iron sleeve
Engine Displacement
816
389
Cylinder Sleeve
Not available
Cast iron sleeve
Engine Oil Type
10W-30 / SAE 30
10W-30
Runtime & fuel system
Runtime @ 50% Load (Gasoline)
11
10.5
Safety & compliance
Overload Protection System
Low oil and overload protection, CO monitoring
Not available
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesYes
Included equipment
Included Accessories
Oil, battery, and wheel kit
Wheel kit
Warranty & identification
Commercial Warranty
3
Not available
Part Number
Not available
EB5000XK3AN
Additional specs
Summary
The Generac #7705 GP15500EFI is a 15,500-watt gasoline generator built for whole-house backup and RV power. Electronic Fuel Injection adjusts fuel delivery based on load, meaning the engine burns only what it needs rather than running at a fixed rate. At this wattage, it can run central air conditioning, a well pump, kitchen appliances, and multiple lighting circuits simultaneously, functioning as a realistic alternative to a permanently installed standby system without the installation cost or natural gas hookup.
The Honda EB5000X is a 4,500-watt gasoline generator built for job sites and extended outages. Its 389cc Honda engine delivers 5,000 peak watts with a 6.2-gallon tank that runs 10.5 hours at 50% load. The recoil-start design and GFCI outlets handle most household and light commercial loads without inverter complexity.
  • Most Powerful
    Generac #7705 GP15500EFI
    15500W running
  • Quietest
    Honda EB5000X
    63 dB
  • Longest Runtime
    Generac #7705 GP15500EFI
    11h at 50% load
Where to buy
Prices can change. We update these automatically.
Generac #7705 GP15500EFI
Store links
No links yet.
Honda EB5000X
Store links
No links yet.
Disclosure: Some links may be affiliate links. Specs and comparisons are never hidden.