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.

  • Energizer eZV8000
  • Powerhorse 2500i
  • Model eZV8000
    Model eZV8000

    Energizer 6,500W Gas Generator

    6500W
    Running
    76 dB
    Noise
    View details
  • Model 2500i
    Model 2500i

    Powerhorse 1,800W Gas Generator

    1800W
    Running
    62 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
SpecificationEnergizer eZV8000Powerhorse 2500i
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterYesYes
Parallel capableNoYes
RV readyYesNo
Running watts
Winner: Winner: 6500 W
1800 W
Starting watts
Winner: Winner: 8000 W
2500 W
Noise (lower limit)
76 dB
Winner: Winner: 62 dB
Weight
194 lbs
Winner: Winner: 48.3 lbs
Run time @50% load
Not available
Winner: Winner: 9.5 h
Run time @25% load
15.5 h
10.5 h
Fuel tank
5.5 gal
1.2 gal
Fuel gaugeYesNo
Approx. dimensions (L × W × H)
28 x 28 x 30
20.4 x 12.5 x 18.3
Electrical
Voltage (AC)
120/240V 60 Hz
120
Voltage (DC)
Not available
Not available
GFCI outletsYesNo
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
<3% %
3 %
Engine
Engine
420 cc OHV 4-stroke
80 cc OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil, Electric
Recoil
Warranty
Warranty
3 years
2 years
Power by fuel
GasolineNot availableNot available
Running watts
6500 W
Not available
Starting watts
8000 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
Not available
9.5 h
Run time @25% load
15.5 h
10.5 h
Other
Data center
Not available
Not available
Indicators
true
true
Compliance
CARB, EPA
EPA, ANSI/PGMA G300-2023
Security
Not available
Not available
Spark arrestorYesYes
Neutral
true
Floating
UPC
Not available
840321763969
Core / High-priority specs
Running Watts (Gasoline)
6500
Not available
Starting Watts (Gasoline)
8000
2500
Runtime @ 50% Load (Gasoline)
Not available
9.5
Runtime @ 25% Load (Gasoline)
15.5
10.5
AC Outlet Types
2x Duplex 120V 20A (5-20R) GFCI; 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R)
1x Duplex 120V 20A (5-20R); 1x 120V 30A (L5-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-stroke
80 cc OHV 4-stroke
Engine Displacement
420
80
Engine Oil Type
10W-30
Not available
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
15.5
10.5
Runtime @ 50% Load (Gasoline)
Not available
9.5
Safety & compliance
Overload Protection System
Low oil and overload protection
Low oil and overload protection, CO monitoring
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringNoYes
Included equipment
Included Accessories
Oil, funnel, tool kit, battery, and wheel kit
Funnel and tool kit
Warranty & identification
Commercial Warranty
3
2
Part Number
INVEZV8000CD
Not available
Additional specs
Summary
The Energizer eZV8000 is a 6,500-watt inverter generator built around a 420cc OHV 4-stroke engine. This wattage places it squarely in the mid-to-heavy duty range, capable of powering multiple household appliances simultaneously. A typical home refrigerator (600 watts), microwave (1000 watts), and several lights (300 watts) can run together, leaving headroom for power tools or additional devices. The 8,000-watt peak rating handles the inrush demand when motors first spin up. Because the eZV8000 runs on gasoline and includes inverter technology with less than 3% THD, users can safely power laptops, TVs, and other sensitive electronics without risk of damage from power spikes. The 5.5-gallon fuel tank delivers 15.5 hours of runtime at 25% load, meaning a full tank can sustain light-duty operation through an entire workday or camping trip.
The Powerhorse 2500i is a portable inverter generator delivering 2,500 surge watts and 1,800 rated watts, featuring a quiet 52dB operation, CO shutdown function, and parallel-ready design for increased power needs.
  • Most Powerful
    Energizer eZV8000
    6500W running
  • Quietest
    Powerhorse 2500i
    62 dB
  • Longest Runtime
    Powerhorse 2500i
    9.5h at 50% load
Where to buy
Prices can change. We update these automatically.
Energizer eZV8000
Store links
No links yet.
Powerhorse 2500i
Store links
No links yet.
Disclosure: Some links may be affiliate links. Specs and comparisons are never hidden.