Cummins Onan · Inverter generator
Onan P2500i
Lightweight, low-THD inverter power for electronics, camping, and tailgating.
Visual spec gallery
The numbers, made scannable.
Up to 2,500 peak watts
Power output changes by fuel. Match against the rating for the fuel you will actually use.
Gas · 25% load
10hr
Gas · 50% load
8hr
Operational volume
52 dBA
Manufacturer-rated minimum
Onboard tank
1.0 gal (3.8 L) gasoline
48lb
Dry weight
19.8 × 10.5 × 18.3 in
L × W × H
- Handle
- Integrated molded carry handle
- Wheels
- None
- Shipping weight
- 57 lb
Start
Recoil
Engine
98cc Cummins Onan OHV 4-stroke
Power quality
≤3% THD · inverter
Safety
Low-oil shutdown
1 duplex 120V 20A (5-20R) · 1 × 12V 8A DC · 2 × 5V USB
Complete specifications
Every useful detail we could verify.
Specifications were compiled from Cummins’ current North American product page and official model spec sheet. Always verify the current manual and exact part number before purchase.
Electrical output
- Gasoline output
- 2,200W running / 2,500W peak · 18.3A @ 120V running · 20.8A @ 120V peak
- Voltage / frequency
- 120V AC / 5V DC · 60 Hz
- Power quality
- Built-in inverter · ≤3% THD
- Parallel capable
- Yes
Engine, fuel & runtime
- Engine
- 98cc Cummins Onan OHV 4-stroke · Variable; 5,500 rpm maximum
- Starting system
- Recoil
- Fuel tank
- 1.0 gal (3.8 L) gasoline
- Gas · 25% load
- 10 hours
- Gas · 50% load
- 8 hours
- Oil
- SAE 10W-30 · 0.37 qt / 11.8 oz
- Altitude
- Carburetor kit required above 2,000 ft
- Sound
- As low as 52 dBA
Connections, safety & portability
- AC outlets
- 1 duplex 120V 20A (5-20R) · 1 × 12V 8A DC
- USB / DC
- 2 × 5V USB
- Grounding
- Floating neutral
- Transfer-switch ready
- No
- GFCI outlets
- No
- Protection
- Automatic low-oil shutdown · CO shutdown not listed on cited sheet · Circuit-breaker overload protection
- Display
- LED: fuel, output, remaining runtime, voltage, lifetime hours
- Dimensions
- 19.8 × 10.5 × 18.3 in
- Weight
- 48 lb dry / 57 lb shipping
- Mobility
- Integrated molded carry handle · None
Ownership details
- Part number
- A074Z433
- Availability
- United States and Canada; this EPA model is not for sale in California
- Certification
- EPA / CSA
- Emissions
- EPA
- Spark arrestor
- Yes
- Residential warranty
- 3 years
- Commercial warranty
- 1 year
Best-fit uses
- Camping
- Tailgating
- Electronics
- Small appliances
Standout features
- Low-THD power for sensitive electronics
- Economy mode
- Rubber-covered outlets
- Parallel-ready with compatible Onan inverter models
Does this model fit your load?
Run your essentials through our independent wattage calculator.