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

  • Genmax GM2000i
  • Yamaha EF2200iS
  • Model GM2000i
    Model GM2000i

    Genmax 1,600W Gas Generator

    1600W
    Running
    58 dB
    Noise
    View details
  • Model EF2200iS
    Model EF2200iS

    Yamaha 1,800W Gas Generator

    1800W
    Running
    57 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
SpecificationGenmax GM2000iYamaha EF2200iS
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterYesYes
Parallel capableYesYes
RV readyNoYes
Running watts
1600 W
Winner: Winner: 1800 W
Starting watts
2000 W
Winner: Winner: 2200 W
Noise (lower limit)
58 dB
Winner: Winner: 57 dB
Weight
Winner: Winner: 34.2 lbs
55.2 lbs
Run time @50% load
Winner: Winner: 8 h
Not available
Run time @25% load
10 h
10.5 h
Fuel tank
1.1 gal
1.24 gal
Fuel gaugeNoYes
Approx. dimensions (L × W × H)
18.7 x 10.6 x 15.9
21.9 x 11.8 x 18.5
Electrical
Voltage (AC)
120
120
Voltage (DC)
5
12
GFCI outletsNoNo
Covered outletsYesNo
Automatic Voltage RegulationYesYes
THD
≤3% %
2.5 %
Engine
Engine
79.7 cc Dinking OHV 4-stroke
79 cc Yamaha MZ80 OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil
Recoil
Warranty
Warranty
1 years
3 years
Power by fuel
GasolineNot availableNot available
Running watts
1600 W
1800 W
Starting watts
2000 W
2200 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
8 h
Not available
Run time @25% load
10 h
10.5 h
Other
Data center
Not available
Not available
Indicators
true
true
Compliance
EPA, ANSI/PGMA G300-2023
CARB, EPA
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Floating
Not available
UPC
768494055363
810856030317
Core / High-priority specs
Running Watts (Gasoline)
1600
1800
Starting Watts (Gasoline)
2000
2200
Runtime @ 50% Load (Gasoline)
8
Not available
Runtime @ 25% Load (Gasoline)
10
10.5
AC Outlet Types
1x Duplex 120V 20A (5-20R)
1x Duplex 120V 20A (5-20R); 1x 120V 30A (TT-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-stroke
OHV 4-stroke
Engine Displacement
79.7
79
Engine Oil Type
10W-30
Not available
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
10
10.5
Runtime @ 50% Load (Gasoline)
8
Not available
Safety & compliance
Overload Protection System
Low oil and overload protection
Low oil and overload protection
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesYes
Included equipment
Included Accessories
Funnel and Tool Kit
No accessories
Warranty & identification
Commercial Warranty
1
3
Additional specs
Summary
The Genmax GM2000i is a 1,600-watt gasoline inverter generator built for portable use. Its 2,000 starting watts handle brief motor surges, while the 1,600 running watts sustain household devices, power tools, and small appliances. At 34.2 lbs, it moves easily between campsites, job sites, and storage.
The Yamaha EF2200iS is a portable inverter generator that offers a balance between power and portability, making it ideal for campers, caravanners, adventurers, and outdoor enthusiasts.
  • Most Powerful
    Yamaha EF2200iS
    1800W running
  • Quietest
    Yamaha EF2200iS
    57 dB
  • Longest Runtime
    Genmax GM2000i
    8h at 50% load
Where to buy
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Genmax GM2000i
Store links
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Yamaha EF2200iS
Store links
No links yet.
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