HomeCummins/OnanCummins/Onan RS20AC C20N6HC

Cummins/Onan RS20AC C20N6HC Generator Set

The Cummins/Onan RS20AC C20N6HC is a 20 kW natural gas or propane vapor standby generator set powered by a Cummins/Onan QSJ999G engine. It is available at 120/240 V, single-phase, 60 Hz and rated 75 A. Starting uses 1 group-51 battery rated 450 CCA at 12 V. The set measures 865×915×694 mm (34.1×36.0×27.3 in), weighs about 271 kg (597 lb) and produces 65 dBA at 7 m.

20 kW
Standby
1.0 L
Displacement
1
Document types

How to read your Cummins/Onan serial & model number →

Typical fuel consumption for 20–25 kW Bi-Fuel (NG/LP) generators →

Compare with other 20–25 kW Bi-Fuel (NG/LP) generators →

Specifications

Fuelnatural gas or propane vapor
Frequency60.0 Hz
Standby power20 kW
Voltage options120/240 V
Phase1
Rated current75 A
Circuit breaker100 A
Battery group51R
Battery cranking450 CCA
Battery voltage12V V
Battery quantity1
Dimensions (L×W×H)865×915×694 mm
Dry weight271 kg
Sound level65.0 dBA @ 7 m

Engine

Cummins/Onan QSJ999G
Displacement1.0 L
AspirationNaturally aspirated
Rated speed3600 rpm

Common questions

What size generator is the Cummins/Onan RS20AC C20N6HC?

The Cummins/Onan RS20AC C20N6HC is rated 20 kW standby.

What engine does the Cummins/Onan RS20AC C20N6HC use?

The Cummins/Onan RS20AC C20N6HC is powered by the Cummins/Onan QSJ999G engine.

What fuel does the Cummins/Onan RS20AC C20N6HC use?

The Cummins/Onan RS20AC C20N6HC runs on natural gas or propane vapor.

Fuel consumption

RatingLoadL/hgal/h
Standby25%5.31.4

Available documents

Spec sheet (Cummins/Onan)