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Cummins Onan 20kW LP Liquid Cooled Standby Generator with 200 Amp Automatic Transfer Switch

Onan Onan
Model#: RS20L-200LP
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Details and Specifications

Cummins Onan 20kW Propane Fueled Liquid Cooled Standby Generator

49 State Compliant - Not for Sale to California

Cummins Onan RS Series 20,000 Watt Propane Fueled Liquid Cooled Standby Generator offers many features, a fully weather protective enclosure, significantly quieter operation, comes on automatically when you need it and shuts down automatically once main power is restored.  Comfort, security and convenience are things you can depend on with a Cummins Onan standby generator - just in case the power goes out.


Cummins Onan RS 20kW Generator Model 20GGMA-6111

• Very quiet operation
• Aluminum weather resistant housing
• Fully automatic operation when used with a Cummins Onan automatic transfer panel
• Atractive and discreet housing
• Electronic governor for precise frequency control
• Includes 120V coolant heater
• Low coolant shutdown
• Listed to UL 2200
• 2 Year Warranty


• RSS200-6635 Cummins Onan 200 Amp Automatic Transfer Switch, outdoor rated (Nema 3R), programmable exerciser and integrated battery charger.

Warranty Information

Manufactures Warranty: 2 Years

Product Specifications

Model Number RS20L-200LP
Manufacturer Cummins Onan
Made In USA Yes
Rated Watts 20kW
Rated Amps 83.3 Amps
Voltage 120/240V Single Phase
A/C Ton Rating 5 Ton
Enclosure Aluminum
UL Listed Yes
Decibel Rating 68 db(A) at 7m at Full Load
Starting System Automatic
Low Oil Alert Yes
Mainline Breaker 100 Amp
Hour Meter Yes
Battery Requirement 12V - 325 CCA
Mounting Pad Requires Prepared Site
Product Weight 1105 lbs.
Dimensions (Inches) 64.4L x 30W x 46.7H
Engine Brand GM Industrial
Engine Size 3.0 Liter/Inline 4 Cylinder
Engine RPM 1800
Cooling System Liquid Cooled
Alternator Type Brushless
Frequency 60 Hz
Auto Voltage Regulation Yes
Fuel Type LPV (Propane)
LP Power Capacity 20kW
LP Consumption @ Full Load 3.2 gal/hr
LP Consumption @ 1/2 Load 2.2 gal/hr
Transfer Switch
Transfer Switch Model RSS200-6635
Transfer Switch Amps 200 Amps
Transfer Switch Circuits Whole Panel
ATS Poles 2 Pole
Warranty Information
Consumer Warranty 2 Year Limited
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