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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.

  • ECHO EGi-4000
  • Generac #8251 GP2500i
  • Model EGi-4000
    Model EGi-4000

    ECHO 3,400W Gas Generator

    3400W
    Running
    67 dB
    Noise
    View details
  • Model #8251 GP2500i
    Model #8251 GP2500i

    Generac 2,200W Gas Generator

    2200W
    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
SpecificationECHO EGi-4000Generac #8251 GP2500i
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterYesYes
Parallel capableNoYes
RV readyYesNo
Running watts
Winner: Winner: 3400 W
2200 W
Starting watts
Winner: Winner: 4000 W
2500 W
Noise (lower limit)
Winner: Winner: 67 dB
0 dB
Weight
86 lbs
Winner: Winner: 48 lbs
Run time @50% load
Winner: Winner: 10 h
4.5 h
Run time @25% load
Not available—
8 h
Fuel tank
3.3 gal
1 gal
Fuel gaugeYesNo
Approx. dimensions (L × W × H)
27 x 18.8 x 24
19.7 x 11.4 x 17.9
Electrical
Voltage (AC)
120
120
Voltage (DC)
5
12
GFCI outletsNoNo
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
Not available—
Not available—
Engine
Engine
212 cc OHV 4-stroke
98 cc OHV 4-stroke
Alternator
Not available—
Not available—
Starting system
Recoil
Recoil
Warranty
Warranty
3 years
3 years
Power by fuel
GasolineNot available—Not available—
Running watts
3400 W
2200 W
Starting watts
4000 W
2500 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
10 h
4.5 h
Run time @25% load
Not available—
8 h
Other
Data center
Not available—
Not available—
Indicators
false
true
Compliance
CARB
EPA, ANSI/PGMA G300-2023
Security
Not available—
Not available—
Spark arrestorYesYes
Neutral
Floating
Not available—
UPC
743184017579
696471003946
Core / High-priority specs
Running Watts (Gasoline)
3400
2200
Starting Watts (Gasoline)
4000
2500
Runtime @ 50% Load (Gasoline)
10
4.5
Runtime @ 25% Load (Gasoline)
Not available—
8
AC Outlet Types
1x Duplex 120V 20A (5-20R)1x 120V 30A (TT-30R)
1x Duplex 120V 20A (5-20R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-stroke
98 cc OHV 4-stroke
Engine Displacement
212
98
Engine Oil Type
Not available—
10W-30
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
Not available—
8
Runtime @ 50% Load (Gasoline)
10
4.5
Safety & compliance
Overload Protection System
Not available—
Low oil and overload protection
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesYes
Included equipment
Starting Components
Not available—
Recoil
Included Accessories
Wheel kit
Oil, funnel, tool kit, and battery charging cables
Warranty & identification
Commercial Warranty
Not available—
3
Part Number
Not available—
82512
Additional specs
Summary
The ECHO EGi-4000 is a 3,400-watt inverter generator built around a 212 cc OHV 4-stroke engine. This wattage class handles essential household appliances during outages, job site tools, and RV systems. The 4,000-watt peak capacity means it can start larger equipment like air compressors or circular saws without stalling. Because the unit runs on gasoline with a 3.3-gallon tank, users will find refueling cycles manageable for weekend trips or short-term backup scenarios. The inverter technology protects laptops, phones, and other sensitive electronics from power fluctuations. A 10-hour runtime at 50% load means users can operate mid-range loads like a refrigerator or power tools for most of a workday without refueling. The 86-pound weight and included wheel kit make it movable for one person, though not effortless.
The Generac GP2500i is a 2200-watt inverter generator built for portable backup power and recreational use. At 48 pounds, it moves easily between campsites, job sites, and emergency situations. The inverter technology means laptops, phones, and sensitive tools run safely because the power output stays stable. This unit runs on gasoline and delivers 2500 starting watts, so it can handle the initial surge when motors kick on.
  • Most Powerful
    ECHO EGi-4000
    3400W running
  • Quietest
    ECHO EGi-4000
    67 dB
  • Longest Runtime
    ECHO EGi-4000
    10h at 50% load
Where to buy
Prices can change. We update these automatically.
ECHO EGi-4000
Store links
No links yet.
Generac #8251 GP2500i
Store links
No links yet.
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