The Cummins Onan DFM 300 generator is listed with standby output of 300 kW, Diesel fuel, 60 Hz operation, and Three phase.
Generator • Diesel • 60 Hz • Three phase
Key specifications
Useful generator charts
Charts are shown only when this model has enough usable source data.
45.1 kW
45.1 kW
How the Cummins Onan DFM 300 compares
This compares the supplied numeric specification with Cummins Onan generators in the same broad standby-power class where enough comparable data exists.
About 29% above the similar-output Cummins Onan average. Around the 77th percentile for this field.
About 12% above the similar-output Cummins Onan average. Around the 69th percentile for this field.
About 7% above the similar-output Cummins Onan average. Around the 57th percentile for this field.
Generator information
| Manufacturer | Cummins Onan |
|---|---|
| Model | DFM 300 |
| Generator type | Generator |
| Fuel | Diesel |
| Frequency | 60 Hz |
Electrical output
| Standby power | 300 kW |
|---|---|
| Standby kVA | 375.0 |
| Phase | Three phase |
| Power factor | 0.8 |
Engine, cooling and controls
| Engine model | Cummins/Onan NTA855G2 |
|---|---|
| Engine displacement | 854 cu in (14 L) |
| Aspiration / cooling | Turbo Aftercooled |
| Rated engine speed | 1800 rpm |
| Engine oil capacity | 10.2 gal (38.6 L) |
| Engine coolant capacity | 21.1 gal (79.8 L) |
| Oil capacity | 8.19 gal (31 L) |
| Coolant capacity | 19 gal (72 L) |
| Alternator | Cummins/Onan 3 Phase 60 Hz YB |
Physical specifications
| Dry weight | 6, 656 lb (3, 019 kg) |
|---|
Battery
| Battery group | 8D |
|---|---|
| Battery voltage | 12 V |
| Battery quantity | 2 |
Maintenance and service parts
| Engine oil | Interval: 500 hr |
|---|---|
| Oil filter | Interval: 250 hr |
| Fuel filter | Part number: M-1398-1; Interval: 500 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.