Skip to content
Skip to main 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.

  • Firman W02981
  • Yamaha EF2800i
  • Model W02981
    Model W02981

    Firman 2,900W Gas Generator

    2900W
    Running
    58 dB
    Noise
    View details
  • Model EF2800i
    Model EF2800i

    Yamaha 2,500W Gas Generator

    2500W
    Running
    65 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
SpecificationFirman W02981Yamaha EF2800i
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterYesYes
Parallel capableYesNo
RV readyYesNo
Running watts
Winner: Winner: 2900 W
2500 W
Starting watts
Winner: Winner: 3200 W
2800 W
Noise (lower limit)
Winner: Winner: 58 dB
65 dB
Weight
84 lbs
Winner: Winner: 68 lbs
Run time @50% load
Not available
Not available
Run time @25% load
10 h
Winner: Winner: 14.7 h
Fuel tank
1.8 gal
2.6 gal
Fuel gaugeNoYes
Approx. dimensions (L × W × H)
23.2 x 17.8 x 17.9
19.2 x 15.6 x 16.7
Electrical
Voltage (AC)
120
120
Voltage (DC)
12
12
GFCI outletsNoYes
Covered outletsYesNo
Automatic Voltage RegulationYesYes
THD
3 %
2.5 %
Engine
Engine
171 cc Firman Max-Pro Series OHV 4-stroke, cast iron sleeve
Yamaha MZ175 OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil
Recoil
Warranty
Warranty
3 years
3 years
Power by fuel
GasolineNot availableNot available
Running watts
2900 W
2500 W
Starting watts
3200 W
2800 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
10 h
14.7 h
Other
Data center
Not available
Not available
Indicators
true
true
Compliance
CARB, EPA
EPA
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Floating
Not available
UPC
840876129814
799530396645
Core / High-priority specs
Running Watts (Gasoline)
2900
2500
Starting Watts (Gasoline)
3200
2800
Runtime @ 25% Load (Gasoline)
10
14.7
AC Outlet Types
1x Duplex 120V 20A (5-20R)1x 120V 30A (TT-30R)
1x Duplex 120V 20A (5-20R) GFCI1x 120V 30A (L5-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
Firman Max-Pro Series OHV 4-stroke
OHV 4-stroke
Engine Displacement
171
171
Cylinder Sleeve
cast iron sleeve
Not available
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
10
14.7
Safety & compliance
Overload Protection System
Low oil and overload protection
Not available
Low Oil ProtectionYesYes
Included equipment
Included Accessories
Oil, funnel, tool kit, and battery charging cables
Not available
Warranty & identification
Commercial Warranty
3
Not available
Additional specs
Summary
The Firman W02981 is a 2,900-watt inverter generator built around a 171cc Max-Pro Series OHV 4-stroke engine with a cast iron sleeve. This wattage runs a refrigerator, microwave, and several household circuits simultaneously, or powers a small RV setup with air conditioning. The 1.8-gallon fuel tank delivers 10 hours of runtime at 25% load, meaning light-duty operation stretches a single tank across a full workday or camping trip. At 58 decibels, it operates quietly enough for residential neighborhoods and campgrounds. The 3% THD output protects laptops, phones, and sensitive electronics from voltage spikes that damage circuits. Weighing 84 pounds with a wheel kit included, it sits at the threshold between portable and stationary, requiring two hands or a dolly for regular movement.
The Yamaha EF2800i is a lightweight and quiet inverter generator capable of powering a range of devices, from power tools to sensitive electronics, making it suitable for home backup, job sites, and on-the-go use.
  • Most Powerful
    Firman W02981
    2900W running
  • Quietest
    Firman W02981
    58 dB
  • Longest Runtime
    h at 50% load
Where to buy
Prices can change. We update these automatically.
Firman W02981
Store links
No links yet.
Yamaha EF2800i
Store links
No links yet.
Disclosure: Some links may be affiliate links. Specs and comparisons are never hidden.