The Cummins Onan 25DEC generator is listed with standby output of 25 kW, diesel fuel, and 50 Hz operation.
Cummins Onan Generator Specifications
Generator • diesel • 50 Hz
Standby power: 25 kW
Key specifications
25 kW Standby power
diesel Fuel
50 Hz Frequency
How the Cummins Onan 25DEC compares
This compares the supplied numeric specification with Cummins Onan generators in the same broad standby-power class where enough comparable data exists.
Standby power
25 kW
21% above avg
82nd percentile
Oil capacity
2.02 gal
15% above avg
69th percentile
Standby power25 kW
Low 15 kWAverage 20.7 kWHigh 26.8 kW
About 21% above the similar-output Cummins Onan average. Around the 82nd percentile for this field.
Oil capacity2.02 gal
Low 0.61 galAverage 1.76 galHigh 3.12 gal
About 15% above the similar-output Cummins Onan average. Around the 69th percentile for this field.
This model Peer average
Generator information
| Manufacturer | Cummins Onan |
|---|---|
| Model | 25DEC |
| Generator type | Generator |
| Fuel | diesel |
| Frequency | 50 Hz |
Electrical output
| Standby power | 25 kW |
|---|
Engine, cooling and controls
| Engine model | Ford C3PX6005A |
|---|---|
| Engine displacement | 220 cu in (3.6 L) |
| Rated engine speed | 1800 rpm |
| Engine oil capacity | 2.02 gal (7.7 L) |
| Engine coolant capacity | 4.25 gal (16.1 L) |
| Oil capacity | 2.02 gal (7.7 L) |
| Coolant capacity | 4.25 gal (16.1 L) |
Battery
| Battery voltage | 12 V |
|---|---|
| Battery quantity | 2 |
Maintenance and service parts
| Engine oil | Interval: 200 hr; Specification: SAE type DS; Capacity: 8.1 qt |
|---|---|
| Oil filter | Interval: 200 hr |
| Air filter | Interval: 50 hr |
| Belt | Interval: 100 hr |
Disclaimer: Specifications should be verified against the official owner’s or service manual and confirmed on the Cummins North America generator website.