Cummins Onan C20 D6 Specs (Power | Fuel Consumption)

The Cummins Onan C20 D6 generator is listed with standby output of 20 kW, Diesel fuel, 60 Hz operation, and 4 available voltage configurations.

Cummins Onan Generator Specifications

Generator • Diesel • 60 Hz

Standby power: 20 kWVoltage options: 4 configurationsDry weight: 974 lb (442 kg)

Key specifications

20 kW Standby power

Diesel Fuel

4 configurations Voltage options

974 lb (442 kg) Dry weight

60 Hz Frequency

Useful generator charts

Charts are shown only when this model has enough usable source data.

Power-to-weight

Standby output per 1,000 lb of dry weight versus similar-output Cummins Onan models.

This model

20.5 kW

Peer average

19.2 kW

57th percentile

Power output

Low 18 kW High 20 kW

Standby

20 kW

Prime

18 kW

Model spec snapshot

Representative numeric specifications from this generator.

20 kWStandby

974.44 lbWeight

How the Cummins Onan C20 D6 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

20 kW

3% below avg

47th percentile

Dry weight

974 lb

25% below avg

48th percentile

Standby power20 kW

Low 15 kWAverage 20.7 kWHigh 26.8 kW

About 3% below the similar-output Cummins Onan average. Around the 47th percentile for this field.

Dry weight974 lb

Low 531 lbAverage 1,292 lbHigh 3,100 lb

About 25% below the similar-output Cummins Onan average. Around the 48th percentile for this field.

This model Peer average

Generator information

Manufacturer	Cummins Onan
Model	C20 D6
Generator type	Generator
Fuel	Diesel
Frequency	60 Hz

Electrical output

Standby power	20 kW
Prime power	18 kW
Standby kVA	25.0
Voltage options	120/240 V, 120/208 V, 277/480 V, 347/600 V

Engine, cooling and controls

Engine model	Cummins/Onan Kubota heavy-duty engine
Engine displacement	101 cu in (1.65 L)
Aspiration / cooling	Naturally aspirated
Rated engine speed	1800 rpm
Maximum ambient	122 °F (50 °C)
Controller	PC 1.1, PowerCommand 1.1
Alternator	Cummins/Onan Brushless, 4 pole, drip proof, revolving field
Emissions	EPA Tier 4i

Physical specifications

Dry weight	974 lb (442 kg)
Dimensions (L × W × H)	65.6 × 36.6 × 50.5 in (1667 × 930 × 1282 mm)

Battery

Battery cranking	550 CCA

Maintenance and service parts

Engine oil	Specification: Cummins heavy-duty engine oil
Oil filter	Specification: Spin on full flow filter, filtration efficiency 25 micron 99% (min)
Fuel filter	Specification: Spin on fuel filters with water separator
Air filter	Specification: Dry replaceable element
Coolant	Specification: Antifreeze 50/50 (Ethylene glycol)

Disclaimer: Specifications should be verified against the official owner’s or service manual and confirmed on the Cummins North America generator website.